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Fiberglass Supply Depot 8 lb Expanding Polyurethane Pour Foam: Gallon Kit (Part A and Part B)

Based on 15 reviews
Condition: New
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$75.98
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Availability: In Stock.
Fulfilled by Fiberglass Supply Depot

Arrives Nov 5 – Nov 7
Order within 16 hours and 13 minutes

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At a glance

Condition
New
Size
1 Gallon Kit
Model
8lb-foam-kit
Dimensions
9 x 6 x 10 in
Weight
10 lb
Color
Amber
Shape
Rectangular

Features 6

  • TWO-PART SYSTEM: This 8 lb density expanding polyurethane pour foam kit includes Part A (Base) and Part B components in 1/2-gallon containers each for a total gallon kit
  • HIGH DENSITY FORMULA: 8 lb per cubic foot density provides superior strength and rigidity, ideal for void filling, and structural reinforcement applications
  • VERSATILE APPLICATIONS: Once cured, it can be cut, sanded, drilled, painted, fiberglassed, or coated
  • EASY MIXING AND POURING: Simply mix equal parts of Part A and Part B together, then pour into desired area where it will expand and cure to form a solid, closed-cell foam

Description

Fiberglass Supply Depot was founded in 2005, but our hands-on experience began in the Florida Keys in the 1980s, building boats, dock boxes and custom fiberglass products. We created FSD to give customers more than just materials—we wanted to share the knowledge to use them. Whether you're a professional or doing it yourself, we offer real-world experience to help you choose the right products and get the job done right. Our roots began in the Florida Keys in the 1980s, building boats, dock boxes and custom fiberglass products. In 2005, we turned that experience into Fiberglass Supply Depot. We don't just sell fiberglass supplies—we've actually used them. Our hands-on experience helps customers choose the right materials and understand how to use them. We enjoy helping people tackle projects themselves. From building to repairing and restoring, our goal is to provide the products and knowledge to help get the job done right. Quality materials backed by decades of hands-on experience to help you build, repair and restore with confidence.

Specs 20

Material high-density closed-cell polyurethane foam
Brand Fiberglass Supply Depot
Item dimensions L x W x H 9 x 6 x 10 inches
Color Amber
Shape Rectangular
Brand Name Fiberglass Supply Depot
Number of Packs 1
Number of Items 1

Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Nov 5 – Nov 7

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Leasing options through Acima may also be available during checkout.

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Top Amazon Reviews


Top notch quality
Size: Quart Kit
Worked as expected. Instructions are simple. Excellent quality, Excellent value
Reviewed in the United States on October 3, 2026 by Amazon Customer

Hardens quick.
Size: Quart Kit
Amazing. Great for setting fence and other posts. Like concrete in 5 minutes.
Reviewed in the United States on July 18, 2026 by Steve S.

Excellet results
Size: 1 Gallon Kit
Absolutely fantastic for me. Good expansion, a bit more than expected but no problems. Dense, firm but still light weight.
Reviewed in the United States on July 8, 2026 by Tim J.

Strong foam
Size: Quart Kit
Worked as expected. If you're used to the regular lighter weight foams, this stuff doesn't expand anywhere near those amounts. The cured foam is strong. I used two whole kits to fill an inflatable keel chamber that had been repaired twice and eventually failed. If you're unsure on how much you'll need, do yourself a favor and buy the gallon kit. It's basically the same price as two quart kits. ... show more
Reviewed in the United States on August 3, 2026 by Nate

Good Stuff
Size: 2 Gallon Kit
I used this to fill a large void under my sidewalk. Followed the instructions, it expanded great. Very happy with it.
Reviewed in the United States on June 26, 2026 by JD

Too expensive since it does not expand as much as they claim
Size: Quart Kit
Too expensive for what it really accomplish. Rethink your project and using thid The foam works out very expensive because it does not expand as much as they claim to. It works, but you will need at least two to three times more to fill the same area they claim. They added that you need to follow the instructions to make it work, as a disclaimer and sales gimmick to fall back on if someone complains. Blame shifting tactics ... show more
Reviewed in the United States on July 1, 2026 by Cecilia Putter

Buy it
Size: 1 Gallon Kit
Works great using it to replace a wood floor that was rotten on the boat
Reviewed in the United States on June 6, 2026 by Enmanuel

Easy to use
Size: Quart Kit
works as advertised, I’m new to this product and even managed to not screw up the first time.
Reviewed in the United States on May 14, 2026 by Amazon Customer
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