Questions and Answers for GREAT STUFF 16 oz. Big Gap Filler Insulating Foam Sealant

A:  Dear Kris, Thank you for your inquiry. great Stuff products would not be recommended for use inside a pipe or other enclosed spaces nor will they be effective in prevention of rust. Regards, DuPont Contact Center

A:  GREAT STUFF(TM) Big Gap Filler is frequently used to air seal around pipe penetrations in a wall, including gas lines, hot water lines, and dryer vents, without any issues. This product is flammable during dispensing. Do not smoke or use near open flame. Shut off pilot lights and sources of ignition until tack free.

A:  Dear SSellers: Yes, in general. Great Stuff and similar spray foams will not damage the pipes. However, if you are trying to seal a hole in a a stud or the "top plate" (the 2x across the top of the studs), this is called "fire blocking" -- a key step, often overlooked, to slow the spread of fire in a wall -- and spray foam is the wrong product to use. It ignites at just 240 degrees F, significantly lower than the ignition temp for wood studs. So the foam will begin to burn long before your studs or top plate do! (The versions of spray foam with "Fire Block" on the label have the same problem.) Building inspectors are becoming more informed on this issue and can fail an inspection if foam is used to seal and fire block these holes. So we use non-flammabe fire resistant caulk. See: 3M Model # CP-25WB+, Home Depot Internet #100166701 Store SKU #163096 If you are trying to seal a hole to the exterior, e.g. through a "rim joist" (the 2x on edge at the top of a basement or foundation wall), this is the wrong product again because it will not reliably seal out water etc. DAP 230 sealant is a good option if the temp is above 45 degrees F. If the temp is below 45 degrees F, use DAP 3.0. Both are available at Home Depot. I hope all of this detail is helpful, Mark

A:  This product is combustible in the cured state. Try a non-combustible product like rock wool. Good luck.

A:  It has a sister meant to be closer to fire/high heat, go to mfr website to find out more

A:  When cured, the maximum use temperature of this product is 240°F, at which point the material is combustible. You may need to use a thermometer to check the temperature of the area in which you plan to apply the material. If you do decide to use GREAT STUFF(TM), please be sure that all pilot lights and other sources of ignition are turned off or disabled during the application, as well as during the approximately 8-hour cure time.

A:  5 second Google search = http://greatstuff.dow.com/product/big-gap-filler.htm

A:  Dear Out in the Cold: Yes, but this is a larger space to fill - 720 cubic inches -- so here are some tips: (1) Temperature: Great Stuff should not be applied in temperatures below 40 degrees F. So pick a warmer day. (2) Multiple passes: Do not try to fill the entire space in one go. The foal will not cure correctly. Spray one 'level' and let it cure for a couple of hours. Then spray another. It will probably take three or four passes to completely fill this space. (3) Number of cans: Standard cans with the straw applicator produce 36 cubic inches per ounce. With a 16 ounce can this equals 576 cubic inches or 1/3 cubic feet. (Thanks to a detailed test by the Fine Homebuilding team.) So you may need two cans -- unless you use the "spritz of water" technique noted below. (4) Great Stuff is a one-component foam that uses moisture in the air to cure. If you spritz the foam with a little water after you apply it, you can boost the volume by 92%. This also improves the density of the cured foam and accelerates the curing process. With a spritz of water, a 16 ounce can with a straw can produce 1,104 cubic inches or .64 cubic feet. So you might be able to fill the space with one can. (5) Cured Great Stuff foam is very flammable (including the 'Fireblock' version) and will ignite at just 240 degrees F. Do not install it near anything that might get hot. The large cavity you are filling must be covered by an approved thermal barrier, e.g. 1/2" drywall, 3/4" plywood, etc. (6) Great Stuff sticks tenaciously to everything, including painted surfaces, carpet, your hair and hands, etc. No standard solvent will dissolve it; you have to let it cure, then scrap, sand or scrub it off. So wear gloves and eye protection, and tarp off everything nearby when you spray it. I hope this is helpful. Mark

A:  Hi outinthecold, GREAT STUFF™ is not to be used for filling closed cavities or voids such as behind walls and under tub surrounds; this improper use of the product could result in the accumulation of flammable vapors and/or uncured material. Failure to follow the warnings and instructions provided with the product, and/or all applicable rules and regulations, can result in injury or death.

A:  1. yes 2. what ARE you going to do when (not if) it OVER expands? ... it carries the expansion force to push wallboard & siding outwards like a balloon might consider some other blow in options or removing/replacing siding/gyp.bd or cutting a hole for batts then disguising it as a wood panel or cabinet door/storage

A:  Acetone or nail polish remover (as per directions on can) may dissolve it while discoloring the carpet. Best to pre-trim and scrape whatever possible first and the sooner, the better before full curing makes things harder. Once cured, you options reduce to cutting the hard foam away and filling in bald spots with new carpet plugs.

A:  Dear Linda: It sounds like you (unfortunately) discovered just how sticky Great Stuff is! This is great for sealing surfaces, but not for your carpet, hair, hands or anything else. No standard solvent will dissolve or soften Great Stuff. The only option is to carefully scrape any large pieces off your carpet. After it fully cures, the foam becomes brittle -- so let the rest sit for a few days to make sure it is completely cured, then try a brush and a little water. I hope this is helpful. Mark

A:  Yes but consider insulated boards/sheets, foil faced

A:  The product would be compatable with all the materials that I can imagine being used in a chichen coop. You would not want the foam accessable to the chickens because the foam might be eaten by the chickens. The foam also does not do well when exposed to daylight. It would do well I think if protected from sun light and our feathered friends I thnk.

A:  YES this is open cell foam not designed to carry weight Shop for no flat tires with a weight capacity rated instead

A:  Yes, This will initially firm up after being injected, but will compress and get smaller under these conditions. Eventually it will become hard and break down. This material is designed to "fill" gaps and "seal" as it clearly states (static conditions). There are no structural or mechanical properties intended with its use. I am not sure of how much weight you are moving but there are many commercial and industrial tire service companies that can solid fill your tires. Probably not cheap like you want but it will give you the outcome you desire. Spray foam is not the answer though.