





๐ ๏ธ Elevate your build with foam that floats, fills, and finishes like a boss!
Fiberglass Supply Depotโs 4 lb density expanding pour foam is a two-part polyurethane closed-cell liquid foam kit designed for professional-grade flotation, soundproofing, insulation, and filling applications. Each 1-gallon kit produces 2 cubic feet of foam that fully expands in 5 minutes at optimal temperatures, cures to a resin-compatible finish, and offers versatile use from marine to sculpting projects.










| ASIN | B08T2195F8 |
| Best Sellers Rank | 476,072 in DIY & Tools ( See Top 100 in DIY & Tools ) 22,923 in Adhesives & Sealers |
| Brand | Fiberglass Supply Depot |
| Coverage | 2 cubic feet (volume coverage) |
| Customer Reviews | 4.4 out of 5 stars 255 Reviews |
| Manufacturer | Fiberglass Supply Depot Inc. |
| Material | Polyurethane Foam |
| Number of Items | 2 |
| Number of Packs | 1 |
| Number of items | 2 |
| Part Number | FBAPOLY4LBGK |
| Recommended Uses For Product | Flotation, Soundproofing, Insulation, Filling Voids, Sculpting, Casting |
| Recommended uses for product | Flotation, Soundproofing, Insulation, Filling Voids, Sculpting, Casting |
| UPC | 819794022934 |
| Unit Count | 5678.1177 millilitre |
J**Y
Reacts fast
Excellent
T**N
Not to be used near fuel
Petrol breaks this product down and absorbs petrol
A**R
Very solid works great
Works great but you have to be fast!
L**E
Great product!!!!
Awesome stuff, I used it to fill holes used from animals going under my cement driveway and walkway. Fantastic results and hardens like a rock
S**V
Dense and low expansion
I am used to working with 3lb foam and wanted to try a 4lb foam for a project that needed some extra stiffness. This product didn't disappoint. The volume of foam that it made wasn't as much as a lighter density, but it set off and hardened extremely quickly. I was able to do my project quickly and get it out of the way. Thanks for making it easy.
Trustpilot
5 days ago
2 months ago