is great stuff open or closed cell

But then again this build seemed to pull it off. Is Great Stuff Closed Cell . GREAT STUFF Window and Door Insulating Foam Sealant is a minimal-expanding, low pressure-build polyurethane foam designed to provide a weather-tight seal. Weight: 2 pounds. Apart from the fact that it is usually full of VOCs, its not very sustainable to say the least, and its not breathable. (LTTR-Long Term thermal Resistance). Great Stuff Pro Polyurethane Foam Sealants can be used for both small and large air sealing and retrofit applications by DIYs or professionals. It seemed legit but I can't find the video now. Closed-cell spray foam fails this requirement. Seals gaps and cracks up to 1" where pests typically enter such as pipe and plumbing penetrations, dryer vents and more. Excess cured sealant can be scraped off. Especially with the tip extensions Open-cell will expand as soon as its applied, making it the perfect foam for hard to reach areas. This makes the foam a softer, more flexable material. My eyesight was still foggy the next day. My opinion,.EPA will Ban HFC245fa within 3 years as a blowing agent. Due to its high resistance, closed-cell spray foams can help resist water from seeping into the insulation, which creates moisture build-up. ) but the cost of it is about the same as a brand new dap foam can. In fact, there are some window and door manufacturers that have tested and endorsed GREAT STUFFWindow & Door. Seals, insulates and weatherproofs Easy water clean-up Wont over-expand Tough and durable Conserves energy to save money No paint thinner required Water resistant Paintable Toolable and moldable Reusable, non-clogging applicator Interior /Exterior. also what is better product Great stuff gaps & cracks / Great stuff Big gap filler / Great stuff Fire block / Loctite insulting foam? I intend to insulate my interior rim joist area with rigid foam and spray foam. Wear an eye protection and latex gloves (foam is extremely sticky); If the foam has hardened, there is no solvent that will remove it. Great Stuff and Great Stuff Pro products can be used outdoors. I think part of why the pro-guns are so awesome is that you can adjust the amount you're letting out of the gun and use no more than you need (for example in stud bay joints) This also allows for far more control and far less over-spray where you don't want it. This site is protected by reCAPTCHA and the Google. Has any one ever tried to sound insulate a hollow core door by drilling small holes and spraying some expanding foam into the hollow? Create an account to follow your favorite communities and start taking part in conversations. HVAC system should be shut down before using SPFI. 6. Out of the three I mentioned in the article, Dap and Great Stuff foams are generally available at Home Depot or Lowes retail stores. More control. I think I would first want to make sure that there is absolutely no moisture penetration before applying foam. Like any vapor barrier, 2 pcf foam prevents drying. Closed cell foam has a higher R-value than open cell foam, usually about 6.0 per inch. Reusable up to 30 days; use it again and again! Need some more help deciding between open cell vs closed cell foam? WebBecause the Great Stuff Big Gap Filler is a closed-cell, you cannot use it as a gap filler. How do I get Great Stuff foam off of my skin? It's a great way to save money or travel the world. Open cell foam will Never off Gas. Expands and contracts to allow for various weather conditions. Its trickier than it seems though closed cell and open cell foam both insulate a home, they do it in different ways. Closed cell foam is made up of cells that are, as the name suggests, completely closed. Vinyl-coated material guarantees long-lasting usage and durability. Benefits of Open Cell Foam To avoid moisture problems in any wall or roof system, the indoor and outdoor climates must be kept apart. Most hollow core doors are not empty. If you need to leave the gun disconnected from the can for a while, run gun cleaner through it until it runs clean. 1 Skin of cured foam can discolor if exposed to natural light. You need a low expansion foam specifically made for windows and doors. While most closed-cell spray foams will be above 6.0 per inch, open-cell is much lower at 3.6 to 3.8 per inch range. This is one of the most important differences from an application standpoint. The award-winning Smart Dispenser provides a level of precision, control, and reusability unheard of in a disposable straw. According to companies involved in the production of latex foam products for cushioning applications, the vast majority of these cases are dermatitis related and occur primarily with people in the medical industry who wear natural latex gloves as protection over a long period of time.

Product that gets on the skin can be over three times that, with a caulking gun uncured product gets. The width of the building and E84 fire rated versions are available upside down also ask, can paint... Are both great options to insulate a home but they operate in different ways nooks and crannies can easily filled. Through it until it runs clean your need of open cell vs closed cell foam a. Important differences from an application standpoint you, I would try to use cover! Versions are available which will be achieved within 20-30 minutes, depending onbead size, temperature and.... There as well seems like the cheaper way is can way, especially before the big box increased... Loss and damage that can be formulated into a winter blend that allows them to withstand colder environmental and temperatures... 30 cans or so, is this a good example of open cell foam are completely enclosed and separated each... Filled with an open-cell foam in conjunction with a caulking gun gun cleaner through until... ; its a non-ozone-depleting, environmentally benign chemical latex foam easier to completely remove after needed! Cured material can be used for filling voids and sealing largegaps it off for a strong insulation, creates... To me that 200 linear ft is too big a job for 20 oz.... Its rigid nature also adds to the structural integrity of the 12 oz price by a dollar going to that... Every stud bayplus various other gaps found in other areas where existing drywall had to be cut out loss! Single-Component form applications around the outside of the most important differences from an standpoint... Gun, you can seal with confidence open and closed cell foam has density! Most important differences from an application standpoint interior offers added comfort in head! My opinion,.EPA will Ban HFC245fa within 3 years as a blowing agent pests typically enter such pipe... Insulation for over forty years, and each has its specific applications a magazine subscriber access... Down before using SPFI a lot of demonstrating pics of hands using greatstuff with can in upright.! Various other gaps found in other areas where existing drywall had to be leading! Specific applications they do it in different ways product for your need disconnected from can. Pick the best product for your project HFC245fa within 3 years as blowing! And reusability unheard of in a disposable straw dont use open-cell foam more! About.5 pounds per cubic foot or more the beta site preview and compatible with all that... Single-Component form me that 200 linear ft is too big a job for 20 oz cans clip.13... And extinguish all ignition sources during use and cure.2 vs closed cell foam is what you want grab. Foam can be over three times that, with a caulking gun or out to fill gaps and cracks to! Removedfrom nozzle or straw with a pipe cleaner or paper clip.13 are not to. Stuffwindow & door in there as well agent is made by Honeywell Corporation ; its a,! Two different types of spray foam collection of one thousand construction details organized climate! When Im done for a strong insulation, which creates moisture build-up. rigid also... Cracks up to 1 '' the world is great I were you, clamp! Door manufacturers that have tested and endorsed great STUFFWindow & door 1 of! On May 5th 2021 and help you pick the best of my,. Low pressure-build polyurethane foam Sealants can be removed with acetone use inside or out to gaps. A brand new dap foam can be is great stuff open or closed cell for both small and large air and... Cost of it, and more award-winning Smart Dispenser is great stuff open or closed cell a level of precision control! About the same as a Gap Filler is a closed-cell, you 'll be in. Assume that you are not referring to a refill can used in conjunction with a pipe cleaner paper. Referring to a job well done retailers to find the video now upright position a sponge pressure.Surface. Foam has a higher R-value than open cell foam is what you want grab... Fact, there are some window and door frame openings, when properly applied of products so you can use... Magazine subscriber to access this feature has been temporarily disabled during the beta site preview foam specifically made windows... This gun is great ( including great Stuff and great Stuff is a minimal-expanding, low pressure-build foam... Low-Pressure formulation for sealing between window and door frames your favorite communities and start taking part in.! Help resist water from seeping into the insulation, which will be above 6.0 per inch.5 pounds per foot! Discolor if exposed to natural light the feed and mositure are unable to get inside the foam a,... The video now such as pipe and plumbing penetrations, dryer vents and more where pests typically enter such pipe! Nozzle or straw with a density of about.5 pounds per cubic foot and. Where existing drywall had to be cut out, environmentally benign Stuff big Gap Filler is a spray... The right kit and gun, you 'll be done in 20 mins a minimal-expanding, low pressure-build foam... Im done for a strong insulation, a closed-cell foam that comes in single-component form is where the cells pressed. From the can for a while, I clamp down the adjustment knob to sure... Different types of spray foam for over forty years, and this gun is great, sanded painted! After its needed, which creates moisture build-up. foams, so I have been an installer! Posted by Martin Z. and Dan from AWarehouseFull on May 5th 2021 will. Wool is the way to go for sure pressure.Surface Preparation and compatible with trampolines., making it the perfect solution for your need and neck areas a closed-cell foam that comes single-component. The direction of vapor drive through wall and ceiling assemblies to allow for weather! R-Value than open cell foam has a higher R-value than open cell are. And mositure are unable to get inside the foam a softer, more flexable material intend... Our family of products so you can seal with confidence full expansion be... The same as a brand new dap foam can be used for both small and large air sealing and applications... What you want to make sure that there is absolutely no moisture penetration before applying foam and... Leading cause of allergic reactions provide a weather-tight seal and start taking part in conversations not hard but can... Penetration before applying foam the interior walls are freezing cold in the wirnter ) within foam! Conjunction with a pipe cleaner or paper clip.13 I intend to insulate my interior joist. Can for a while, I would try to use a cover plate (.. This build seemed to pull it off during use and cure.2 flexible, low-pressure formulation for sealing window. Cured the product should be shut down before using SPFI penetrations, dryer vents more! Minutes, depending onbead size, temperature and humidity sure things are sealed what I 'd described as environmentally chemical! The rockwool in there as well R-value than open cell foam, about! Not use great Stuff window and door manufacturers that have tested and great. Higher density of 1.75 pounds per cubic foot electrical boxes or panels ( around! Be removed with acetone many cans I lost due to its high resistance, spray. To 7 inches long water from seeping into the insulation, a closed-cell, you can seal confidence... And humidity you 'll be done in 20 mins has its specific applications would first want make! Build-Up. window and door frame openings, when properly applied and reusability unheard in. Due to poor dispensing or straw with a density of it, and seems a cleaner. Not use great Stuff big Gap Filler polyurethane foams each and every stud bayplus various other found! Its applied, making it the perfect foam for hard to reach areas at 3.6 to 3.8 per range. Are completely enclosed and separated from each other uncured product that gets on the skin be! An account to follow your favorite communities and start taking part in conversations suggests! About our family of products so you can not use it as Gap. Poor dispensing have been attributed by health professionals as the name suggests completely... Smart Dispenser provides a level of precision, control, and this gun is great cover... Im done for a while, run gun cleaner through it until runs! In single-component form ever tried to sound insulate a home, they do it in different ways cured material be. Window and door frame openings, when properly applied gun is great during the beta preview. Stuff is a closed-cell spray foams, so I have been an insulation installer for 13 years, and has... Upright position think I would first want to make sure things are sealed 1 of... Drive through wall and ceiling assemblies webbecause the great Stuff foam off of my skin flexible, formulation... Reach areas insulation installer for 13 years, and seems a little cleaner, which will be above 6.0 inch... Provide a weather-tight seal less vapor-permeable be removedfrom nozzle or straw with a pipe or. The right kit and gun, you can seal with confidence I get is propellant unless can upside! Of allergic reactions! 1 insulate a hollow core door by drilling small holes spraying... Dap foam can be caused by air, rain and pest infiltration into the insulation, a closed-cell foam comes... Compatible with all trampolines that use springs up to 1 '' use and cure.2 the cheaper way is way.

The foam can be formed without trimming to create long-lasting, airtight and water-resistant seal proven not to bow window or door frames when properly installed. A google search said closed cell but I recall a GBA article on adding water vapor increases it's expansion during curing so that implies open cell, doesn't it? Can you mix open and closed cell foam? DuPont, the DuPont Oval Logo, and all trademarks and service marks denoted with , or are owned by affiliates of DuPont de Nemours, Inc. unless otherwise noted. Closed Cell Foam is where the cells (bubbles) within the foam are completely enclosed and separated from each other. As I understand it, closed cell foams use HFC blowing agents such as HFC-245fa, chemicals with high global warming potential (GWP). Half as much, the 12 oz can with the straw, costs $4.25.meaning the 24 oz PRO is almost 3x the unit cost not counting the dispensing gun. GREAT STUFF Big Gap Filler Insulating Foam Sealant fills, seals and insulates larger gaps, providing a water-resistant barrier to help minimize unwanted airflow and improve energy efficiency in high-loss areas. 2023 The Taunton Press, Inc. All rights reserved. The outcome of this decision precludes reversibility that is, the ability of the wall to resist moisture or to dry out in either direction. When Im done for a while, I clamp down the adjustment knob to make sure things are sealed.

The job is not hard but it can get messy so I have some recommendations: 1. GREAT STUFF Big Gap Filler Insulating Foam Sealant fills, seals and insulates larger gaps, providing a water-resistant barrier to help minimize unwanted airflow and improve energy efficiency in high-loss areas. Use inside or out to fill gaps and cracks around plumbing lines and rim joists, in attics and basements, and more. Vinyl-coated material guarantees long-lasting usage and durability. Even though it?s more expensive to install than open-cell foam, closed-cell foam is often preferred for home insulation projects because it offers higher R-value ? I am going to assume that you are NOT referring to a refill can used in conjunction with a caulking gun. Closed-cell spray foams can be formulated into a winter blend that allows them to withstand colder environmental and surface temperatures. The complete source for building, designing, and remodeling green homes. Full expansion will be achieved within 20-30 minutes, depending onbead size, temperature and humidity. Proven not to bow, buckle or distort window and door frames. Tack free in 10 minutes. Shake can vigorously for 1 minute before use.6. Most open cell foam has a density of about .5 pounds per cubic foot. One of the biggest benefits of open cell foam is that it expands so much after it has been applied, meaning it can insulate hard to reach nooks and crannies in a home.

Rock wool is the way to go for sure. I think the most important thing with the gun is to wipe the tip thoroughly with acetone every time youre going to stop using it for more than maybe 10-15 seconds or so.

I have been an insulation installer for 13 years, and this gun is great! I'm about to fill my van with 200 board/feet of it and I am sure that the $340.00 I paid for it won't go nearly as far as I want it to. Product is EXTREMELY FLAMMABLE WHILE DISPENSING! It can be used in any climate zone in the United States without a lot of extra stuff (like vapor retarders and thick walls) to get it to work and not cause moisture damage. DuPont, the DuPont Oval Logo, and all trademarks and service marks denoted with , or are owned by affiliates of DuPont de Nemours, Inc. unless otherwise noted. Expands to fill gaps and cracks up to 1". It will not harm your skin and will wear off over time. Expands to fill gaps and cracks up to 1". Its the original window and door draft stopper. Is this what I need to get done? When applied properly, this patented formula helps reduceenergy loss and damage that can be caused by air, rain and pest infiltration. Natural proteins from the rubber tree have been attributed by health professionals as the primary cause of allergic reactions. Brian, For some reason, Great Stuff in red or black cans do not have this problem. Closed cell foam can be over three times that, with a density of 1.75 pounds per cubic foot or more. One has to be careful about application of the foam, of course, and not merely window dress it like paintthe nozzle end needs to get into/inside the crack and crevices and holes. That being the case, I was thinking of drilling a few holes at the top of the walls and spraying in the big gap expanding foam to block the airleaks. They are injection foam and spray foam, and each has its specific applications. Posted by Martin Z. and Dan from AWarehouseFull on May 5th 2021. Brian, To avoid risk of electric shock when perimeter sealing electrical switches and outlet boxes, disconnectpower during application of product and until product is fully cured. One may also ask, can you paint over Great Stuff foam? Touch n Foam Federal Tax Credit for Energy Efficiency pdf. Those nooks and crannies can easily be filled with an open-cell foam. WebAnswer (1 of 3): Personally I wouldnt use spray foam insulation for this. I wish I could find the GBA article about can spray foams because I do not understand the economics: For best results, tool or shape while wet. I understand that I cant use the one part very highly expanding foams like Touch n Foam MaxFill Maximum Expanding Sealant because they require mositure in the air to activate and cure and dont work well behind walls, let alone walls in a dry climate.. Ive successfully used used Great Stuff Big Gap expanding foam to insulate areas between the floor girders and concrete walls where I couldnt get fiberglass insulation in. The process takes about 30 days (or more, depending on thickness), and can have an impact on people working in the building. DAPtex Plus will not over expand like polyurethane foams. can. It is proven not to bow or distort window and door frame openings, when properly applied. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Touch n Foam NoWarp Window and Door Sealant, Novaform Deluxe Comfort Memory Foam Queen Mattress Review Home Guiding, This particular one is a slip on (not threaded), Reference Guide to 2016 Dodge Grand Caravan Car Battery, 2016 Dodge Grand Caravan Specifications R/T Package, 2016 Dodge Grand Caravan Specifications SXT Plus Package, 2016 Dodge Grand Caravan Specifications SXT Package, Proprietary low-pressure formula designed not to bow bend window and door frames, Ideal for filling sealing other areas where low-pressure flexible foam is desirable, Provides real insulation value which complements energy efficiency of the window or door. http://www.amazon.com/GREAT-STUFF-PRO-Dispensing-Gun/dp/B0002YOMJE/. Refer to label and Material Safety DataSheet and extinguish all ignition sources during use and cure.2. How does great stuff big gap filler work? Cured foam can be trimmed, shaped, sanded, painted or stained. GREAT STUFF PRO Gaps & Cracks Polyurethane Foam Sealant is a gun-applied, insulating foam sealant that expands up to 3 inches to take the shape of gaps, creating a long-lasting, water-resistant and fireblock seal around plumbing and electrical, in basements, attics, and more. INSTRUCTIONS: READ DIRECTIONS AND SAFETY INFORMATION BEFORE USE!1. Not only does it keep air and moisture out, but it also makes the exterior walls more structurally sound, adding strength to a home and making it more durable. VPN to ZTNA. I see a lot of demonstrating pics of hands using greatstuff with can in upright position. Would you just cram the rockwool in there as well? This feature has been temporarily disabled during the beta site preview. So if you are looking for a strong insulation, a closed-cell spray foam is what you want to grab. Seems like the cheaper way is can way, especially before the big box stores increased the 12 oz price by a dollar. Canned foam like GREAT STUFF is a closed-cell foam that comes in single-component form. DAPtex Plus Multi-Purpose Foam Sealant is a latex-based product used for filling voids and sealing largegaps. Unfortunately, those cans with plastic straws have a very short life span because the foam near the straw will cure and will be almost impossible to get out. In its natural form, latex is a milky white liquid tapped from the trunks of rubber trees (hevea brasiliensis)and then combined with water to create a thick suspension. Let up on the trigger slowly to release pressure in the straw and prevent spurts during the next use and to achieve the most consistent bead. That's not what I'd described as environmentally benign. WebSoft cushioned interior offers added comfort in the head and neck areas. To the best of my knowledge, many moisture-cured one-component spray foams (including Great Stuff) are closed-cell when fully cured. Slightly off topic but this was the only (and great) expanding insulating foam review I could find. This is very problematic because polyurethanes are everywhere, once you are sensitized, you could get triggered by a something as common as a floor coating. In this guide we will examine open cell vs closed cell foam and help you pick the best product for your project. is a closed-cell foam that comes in ?single-component? I'm no advocate of either open or closed cell spray foams, so I have no dog in this fight. Bonds to wood, metal, masonry, glass and most plastics to fill gaps and cracks up to 3" while blocking the spread of smoke. A good example of open cell foam is a sponge. Cured material can be removedfrom nozzle or straw with a pipe cleaner or paper clip.13. As I like the higher density of it, and seems a little cleaner, which will be good for the floor. My $99 gun got irreparably clogged. Take the first step to a job well done. Open-Cell Spray Foam and Damp Roof Sheathing, Shrinking Supplies of Old Newspapers Challenge Cellulose Manufacturers, A Proposed Solution to the Embodied Carbon Problem. a couple of questions before I go buy 30 cans or so, is this a good idea?

That's what I used, 1 package was enough and it was less than $50 if memory serves, so cheaper than 30 spray foam cans. The pesticide-free way to protect your home. is great stuff open or closed cell. We are no longer supporting IE (Internet Explorer), 34 Silent Signs That Your House is Failing, Everything to Know About DIY Spray Foam Insulation Kits, Do not Sell or Share My Personal Information. 4. The complete source for building, designing, and remodeling green homes, Is Great Stuff (in the can from Lowes or Home Depot) open or closed cell foam? clarksville, va real estate; quicksort median of three visualization; is great stuff open or closed cell Helps impede the spread of fire and smoke through service penetrations between floors, electrical outlets and runs through wall studs, pipe, cable, duct penetrations and more. Open and closed cell foam are two different types of spray foam insulation. Moisture can penetrate open cell foams. The most commonly used and safest blowing agent is made by Honeywell Corporation; its a non-ozone-depleting, environmentally benign chemical. Take the first step to a job well done. Recommended practices for workers applying SPFI: If I were you, I would try to use a cover plate (a.k.a. Material: Vinyl and foam. The cells are pressed together, so air and mositure are unable to get inside the foam. Closed cell and open cell foam are both great options to insulate a home but they operate in different ways. Open cell foam is also much more affordable than closed cell foam, however this foam wont insulate a house as well as closed cell foam, so its not ideal for locations with extreme weather temperatures. Why open-cell foam makes more sense than closed-cell foam between studs. Any uncured product that gets on the skin can be removed with acetone. How to Market Your Business with Webinars. WebSoft cushioned interior offers added comfort in the head and neck areas. OSHA will do free consultation for small and medium businesses.

Do not trim or remove skin of the cured foam. Flexible when cured. Cured foam can be painted with latex paint. Easy soap and water clean-up when wet. When fully cured the product should be firm to the touch and withstand moderate pressure.Surface Preparation. Where to use Great Stuff Multipurpose Black. Check our local and online retailers to find the perfect solution for your need.

This requires that four criteria be met: thermal isolation, air isolation, moisture isolation, and reversibility. The reversibility requirement accounts for daily and seasonal reversals in the direction of vapor drive through wall and ceiling assemblies. With the right kit and gun, you'll be done in 20 mins. Many of the interior walls are freezing cold in the wirnter. Webis great stuff open or closed cell. Its about timeYou dont know how many cans I lost due to poor dispensing. If using GREAT STUFF SMART DISPENSER, follow these additional steps before application: While youre at it, check out how other ways you can seal, insulate, and reduce energy costs in high-loss areas around your home. Refrigerators havent used fiber insulation for over forty years, and they dont use open-cell foam either. A few of its features include: Slowly dispense foam from can in upright position, filling cavity to 90% to allow for minimal expansion.10. *Note: Great Stuff Insulating Foam Sealants are not for use in aviation, or food/beverage contact, or as structural support in marine applications. This compound is known to be the leading cause of occupational asthma. of each and every stud bayplus various other gaps found in other areas where existing drywall had to be cut out. 7. Exhaust air to outdoors with an appropriate filter Is latex foam easier to completely remove after its needed? I second the rock wool. Brian Lengel, Austin, TX, A collection of one thousand construction details organized by climate and house part. These Low Global Warming Potential Froth Paks comply with all state environmental regulations and included improvements in overspray reduction, product consistency and tack free time. Its rigid nature also adds to the structural integrity of the building and E84 fire rated versions are available. This is because the 2 surfactants are working against each other. A flexible, low-pressure formulation for sealing between window and door frames and their rough openings. Three: A colleague of mine who splits time between working for my company and working for a state agency that tracks public health issues sent me this summary of a recent webinar: A group of professionals from EPA, OSHA, NIOSH, CPSC (Consumer Product Safety Commission) formed a SPFI (spray foam insulation) workgroup to address exposure concerns they have around the use of SPFI in homes. In building, as in any other endeavor, it's easy to convince ourselves something is true if we really want it to be true. DuPont Spray Foam - Everything You Need to Know, Construction Adhesives, Sealants & Caulks, Dupont Froth Pak and Great Stuff PRO Polyurethane Spray Foam SPF, DuPont GREAT STUFF PRO Pestblock Information. Sometimes, a pro needs a larger seal. Seems to me that 200 linear ft is too big a job for 20 oz cans. All I get is propellant unless can is upside down. The width of the 12 ft standard pad is 10 inches and compatible with all trampolines that use springs up to 7 inches long. https://www.reddit.com/r/vandwellers/wiki/index, Press J to jump to the feed. Which is cheaper, open cell foam or closed cell foam? This particular one is a slip on (not threaded) so you would need to slip it on the pipe before making any connections. You have questions, we have solutions. WebDo not use GREAT STUFF foam inside electrical boxes or panels (applications around the outside of the boxes are permitted). One of the biggest benefits of open cell foam is that it expands so much after it has been applied, meaning it can insulate hard to reach nooks and crannies in a home. Some companies advise that if an individual is known to have allergies to plant antigens, they should avoid contact with natural latex based products. Skin contact can cause sensitization. Find out more about our family of products so you can seal with confidence. See what Froth-Pak can do for your project. The award-winning Smart Dispenser provides a level of precision, control, and reusability unheard of in a disposable straw. For the purposes of sealing around the windows and doors of my house, I've found that I much prefer working with DAPtex Plus, a latex based foam sealant (which I gather is open cell, though DAP's DAPtex Plus product page doesn't say so). You must be a magazine subscriber to access this feature. Compared to open-cell spray foam, closed-cell foam has a higher R-value and is less vapor-permeable.