





🛠️ Expand your possibilities with foam that works as hard as you do!
Fiberglass Supply Depot’s 4 lb density 2-part polyurethane expanding pour foam delivers 2 cubic feet of closed-cell insulation and flotation material. Designed for rapid 5-minute expansion at optimal temperatures, it’s perfect for soundproofing, filling voids, and boat or dock flotation. Once cured, it’s compatible with polyester, epoxy, and vinyl ester resins, making it a versatile, durable solution for professional-grade projects.





| ASIN | B08T2195F8 |
| Best Sellers Rank | 1,140,451 in DIY & Tools ( See Top 100 in DIY & Tools ) 41,918 in Adhesives & Sealers |
| Brand | Fiberglass Supply Depot |
| Coverage | 2 cubic feet (volume coverage) |
| Customer Reviews | 4.3 4.3 out of 5 stars (243) |
| Manufacturer | Fiberglass Supply Depot Inc. |
| Material | Polyurethane Foam |
| Recommended Uses For Product | Flotation, Soundproofing, Insulation, Filling Voids, Sculpting, Casting |
| UPC | 819794022934 |
L**E
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
R**H
Works well. Be quick and ready for it, it expands quickly and will come for you if you're not prepared to control it.
A**H
It worked perfectly to replace floatation foam in a boat
J**D
Works great , quick set up and easy to use
1**Y
Being a more dense foam I was hoping for more expansion but it did the job. I used this to repair my pool steps from where improper install caused the dirt to wash out underneath them. This filled the void well.
Trustpilot
2 days ago
1 month ago