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Fiberglass Supply Depot

Fiberglass Supply Depot 2 Lb Density Expanding Pour Foam, 2 Part Polyurethane Closed Cell Liquid Foam for Boat and Dock Flotation, Soundproofing, Filling Voids, and Insulation (2 Gallon Kit)

  • Based on 113 reviews
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Availability: In Stock.
Fulfilled by Amazon
Arrives Tuesday, Jul 14
Order within 1 hour and 50 minutes
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Features

  • Flotation Foam is a polyurethane 2 part foam that, when mixed in equal parts and poured in place this foam will soundproof, insulate, or provide extra buoyancy.
  • This expandable foam is recommended for void filling in nonstructural applications. It can be poured underneath decks and inside cavities where a lightweight flotation foam is needed to provide buoyancy.
  • 2# Density polyurethane flotation Foam 2 Gallon Kit; Consists of 1 gallon of Part A and 1 gallon of Part B and produces 10 cubic feet.
  • Once fully cured this foam can be laminated over with any type of polyester, epoxy or vinyl ester resin without melting.
  • All expansion rates and times given are temperature critical. Temperatures below 75° F will lower the expansion rate therefore requiring more foam. Ideal working temperature is 75° to 80° F or above. Accurate measuring of these products is extremely critical. Working time before foaming: approx. 45 seconds Time before full expansion: approx. 5 minutes

Specific Uses For Product: Boat and Dock Flotation, Void Filling, Soundproofing, Insulation


Item Form: Liquid


Other Special Features of the Product: Flotation, Soundproofing, Water Resistant


Container Type: Bottle


Full Cure Time: 5 Minutes


Water Resistance Level: Water Resistant


Viscosity Level: Medium to High


Compatible Material: Fiberglass


Item Package Quantity: 1


Volume: 2 Gallons


Material Type: Foam, Resin


Color: Clear


Brand Name: Fiberglass Supply Depot


Model: poly2lb2gk


Unit Count: 256.0 Fluid Ounces


UPC: 819794022675


Number of Pieces: 2


Manufacturer: Fiberglass Supply Depot Inc.


Part Number: poly2lb2gk


Item Weight: 20 Pounds


Included Components: Part A Part B


Best Sellers Rank: #43,202 in Industrial & Scientific (See Top 100 in Industrial & Scientific) #81 in Urethane Adhesives


ASIN: B08LW1ZNK8


Customer Reviews: 4.7 4.7 out of 5 stars (113) 4.7 out of 5 stars


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Tuesday, Jul 14

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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Top Amazon Reviews

    • Works quickly
Works as it should. Expands very fast!!
Reviewed in the United States on April 13, 2026 by Soup bowl
    • Very effective.
Worked great. As described. Used as floatation for kayaks. Perfect. Shipped in quality packaging, no leakage.
Reviewed in the United States on June 21, 2026 by Scott Hough
    • Works great for sculpting
We use this foam to "glue" blocks of foam together for carving into characters for Burbank's Rose Parade floats. The 2 lb density matches the density of the blocks and is easy to carve.
Reviewed in the United States on May 10, 2026 by RLH
    • Works well
Worked well redid a 21 ft sylvan with it
Reviewed in the United States on January 2, 2026 by chevy16001
    • Good product Good product
Review Image by Kindle Customer
Does well. Be prepared to work quickly
Reviewed in the United States on August 27, 2025 Reviewed in the United States on August 27, 2025 by Kindle Customer
    • Great chemistry with this product
Over all a high quality expanding foam with an average price point. It will expand quickly so you need to prepare your project before mixing it will not wait for a slow mover!
Reviewed in the United States on June 23, 2023 by William Bell
    • Works well. Works well.
Review Image by Amazon Customer
16 oz of part A and 16oz of part B will yield 1 cubic foot of foam. Mix fast as you have 30-45 seconds to mix before it starts to grow. Works great in cardboard forms be sure to reinforce large ones at the top so they don’t bulge. It shapes real easy if needs to be trimmed.
Reviewed in the United States on February 10, 2024 Reviewed in the United States on February 10, 2024 by Amazon Customer
    • This pour foam works great.
I would recommend this pour foam to anyone replacing their boats foam. This was my first time using pour foam and I can recommend a few things. Get the silicone mixing attachment for a small drill, mask off with plastic film because it doesn't stick well to it and makes clean up easier. I poured a very small amount first to seal up any small holes and then a larger amount to fill space. Hopefully this helps, have fun and good luck. ;) ... show more
Reviewed in the United States on May 19, 2023 by Livin' D. Dream

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