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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Great Stuff 157911 Insulating Foam Sealant, 20 Ounce, Ivory

Product ID: 10613960

Details

Brand
Great Stuff
Item Weight
20 Ounces
Item dimensions L x W x H
2.75 x 2.75 x
Material
Polyurethane
Style
Gaps & Cracks

💧Waterproof & moisture-resistant seal

🧱Expands to fill gaps up to 1 inch

🛠️Easy straw applicator for precision

¥5946

Duties & taxes included

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Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🛡️ Seal smart, save energy, and never let a draft crash your vibe!

WEATHERPROOF YOUR SPACE - Creates a durable, waterproof barrier that resists moisture and condensation indoors and out.
SEAL EVERY CRACK LIKE A PRO - Expands seamlessly to fill and insulate gaps up to 1 inch, blocking drafts and boosting energy efficiency.
INVISIBLE INSULATION UPGRADE - Ivory color blends discreetly with most surfaces, maintaining your space’s sleek aesthetic.
VERSATILE INDOOR OUTDOOR USE - Perfect for sealing cracks in wood, masonry, and more—protect your home year-round.
EFFORTLESS PRECISION APPLICATION - Straw applicator ensures smooth, controlled foam delivery for clean, professional results every time.

Great Stuff 157911 Insulating Foam Sealant is a 20-ounce polyurethane foam that expands to fill gaps up to 1 inch, creating an airtight, waterproof seal that improves energy efficiency and prevents drafts. Its ivory color blends with most surfaces, and the included straw applicator allows for precise, easy application both indoors and outdoors.

Specifications

ASIN	B0002YX98O
Best Sellers Rank	#4,605 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #9 in Industrial Joint Sealants
Brand Name	Great Stuff
Color	Ivory
Compatible Material	Polyurethane
Customer Reviews	4.5 4.5 out of 5 stars (1,896)
Global Trade Identification Number	00074985001567
Included Components	Expanding foam sealant
Item Dimensions	2.75 x 2.75 x 9.5 inches
Item Form	Foam
Item Type Name	Insulating Foam Sealant
Item Weight	20 Ounces
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	Wood
UPC	074985001567
Unit Count	20.0 Ounce
Warranty Description	Warranty
Water Resistance Level	Waterproof

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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¥5946

Duties & taxes included

In stock

Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Japan.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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Received my product in pristine condition. Great service overall.

1 month ago

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Great price for an authentic product. Fast international shipping too!

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