What is the R-rating on this?

Hi Dave! The initial R-value is 4.3 per inch and the aged R-value is 3.7. Good luck with your project!

Is closed or open cell foam?

Hi Meggi, This is a closed cell foam.

can this be used to fill holes between dry wall and hardwood, then covered with molding? Will the foam crack if a nail goes into it?

This is the perfect place to use this foam! I did this in my own home recently when we were installing new baseboard. You can apply the foam in the gap, and like others said be careful about overfilling because it does expand quite a lot. I also highly recommend buying our Cleaner / Amazon # B0002YWRG4 because you can spray this on a paper towel and clean up foam when it's still wet. It's a useful product for any project using GREAT STUFF foams. Don't worry if it puffs out too much, you can cut, sand, caulk or paint this foam once fully cured/dry. The foam will not crack if you nail through it but it also is not structural so you'll need to make sure you're nailing the molding into the wall. Good luck with your project!

is it safe around a hot baseboard heater pipe coming into the room through the floor?? thats where mice get into the rooms from under the floor

I looked at the can and it doesn't really say. The stuff before it cures is full of flammable gas but it doesn't say anything about keeping the cured material from heat. Now, that being said, (I'm putting on my professional chemist hat) Great Stuff is a polyurethane. And polyurethanes are flammable. So, I would be concerned if the area got very hot, say over 150F. Hope this helps.

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157911 Insulating Foam Sealant, 20 Ounce, Ivory

Product ID: 271576377

Details

Brand
Great Stuff
Item dimensions L x W x H
7 x 7 x 24.1
Item weight
0.4 Kilograms
Material
Polyurethane
Style
Gaps & Cracks

💧Waterproof & moisture-resistant

🕒Long-lasting airtight seal

🧱Expands to fill gaps & cracks

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€ 50.09

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Sold byAmazon AustriaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🛠️ Seal smart, save energy, and never let drafts win!

TRUSTED TESTED - Meets ASTM C-920 standards and backed by 4.5-star reviews from nearly 1,800 satisfied users.
EFFORTLESS APPLICATION - 20-ounce can designed for easy, precise use in tight or hard-to-reach areas.
SEAMLESS SURFACE MATCH - Ivory color blends naturally with most walls, tiles, and sinks for a clean, professional finish.
WEATHERPROOF YOUR SPACE - Waterproof formula ensures lasting protection against moisture and drafts, indoors or out.
SEAL EVERY CRACK LIKE A PRO - Expands on application to create a durable, airtight barrier that boosts energy efficiency.

Great Stuff 157911 Insulating Foam Sealant is a 20-ounce polyurethane foam that expands to fill gaps and cracks, creating a waterproof, airtight seal. Ideal for both interior and exterior use, its ivory color blends seamlessly with most surfaces. Certified to ASTM C-920 standards, it enhances energy efficiency by preventing drafts and moisture intrusion, making it a top-rated choice among homeowners and professionals alike.

Specifications

ASIN	B0002YX98O
Best Sellers Rank	#18,438 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #122 in Hardware Sealers
Brand Name	Great Stuff
Color	Ivory
Compatible Material	Glass
Customer Reviews	4.5 4.5 out of 5 stars (1,795)
Global Trade Identification Number	00074985001567
Included Components	Expanding foam sealant
Item Dimensions	7 x 7 x 24.1 centimeters
Item Form	Foam
Item Type Name	Insulating Foam Sealant
Item Weight	0.4 Kilograms
Manufacturer	Great Stuff
Material Type	Polyurethane
Model	157911
Number of Items	1
Part Number	157911
Style Name	Gaps & Cracks
Supported Standards	ASTM C-920
Surface Recommendation	[At least some of: Wall, Sink, Tile, Floor]
UPC	074985001567
Unit Count	20 Ounce
Water Resistance Level	Waterproof

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