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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 (1 Gallon Kit)

    • Based on 217 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon
Arrives Wednesday, Apr 23
Order within 19 hours and 20 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 1 Gallon Kit; Consists of 1/2 gallon of Part A and 1/2 gallon of Part B and produces 5 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

Brand: Fiberglass Supply Depot


Specific Uses For Product: Flooring, Repair, Wall Repair, Woodworking, Casting


Material: Foam


Compatible Material: Fiberglass


Item Form: Liquid


Package Dimensions ‏ : ‎ 10.12 x 9.06 x 4.53 inches; 10.12 Pounds


Item model number ‏ : ‎ Poly2lbgk


Date First Available ‏ : ‎ December 30, 2020


Manufacturer ‏ : ‎ Fiberglass Supply Depot Inc.


Best Sellers Rank: #41,588 in Industrial & Scientific (See Top 100 in Industrial & Scientific) #63 in Urethane Adhesives


#63 in Urethane Adhesives:


Customer Reviews: 4.6 4.6 out of 5 stars 217 ratings


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Apr 23

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

    • Fast-acting and really dense
Magnificent. I had a sewer vent inside of a wall cavity that was leaking sewer gas inside the concrete slab. Faced with $5000 of work, I instead mixed a cup of each of these and poured it into the cavity. The closed-cell foam blocks sewer gas better than concrete. It worked beautifully! The next day, I decided to fix my tippy mailbox. Instead of mixing a bunch of concrete, I poured in a half-cup of this. Job done. The only thing unclear is that you have to add B to A, not the other way around. (Or maybe it is the other way around. Read the instructions.) The only thing that's annoying is that A and B have different densities so I have to mix it by volume, not weight. I'm probably too careful with that. ... show more
Reviewed in the United States on March 8, 2025 by J. Smith
    • Works great.
Great stuff.
Reviewed in the United States on January 17, 2025 by leslee
    • Crafty
Review Image by Brittney Burger Brittney Burger
This product was amazing!!!! This was not what This product was made for but using this for my halloween project is great. Can be messy if not used properly but with the instructional video and how to use guide, it makes it easy for anyone to use. Great, great, great product highly recommended.
Reviewed in the United States on October 16, 2024 by Brittney Burger Brittney Burger
    • Didn't go as far as I'd hoped it would
I'm doing under the floor of a 1975 17' smoker craft aluminum boat. I was hoping that I could do the whole thing in one order. I even put blocks of pink foam board to use up more space, it helped but it still only did about half. And that's with a channel down the center of the bottom of the boat. I also pulled out all the leftover from the mixing bucket after it was fully expanded and put into the next space to help fill for the next pour. Other than that, it works good and does what it's supposed to do. I just wish one order would have been enough. ... show more
Reviewed in the United States on August 2, 2024 by Joe G
    • Awesome
This product was easy to mix and has done a great job keeping me and my family safely fishing on our homemade outriggers
Reviewed in the United States on March 21, 2025 by Frequent Amazon Customer
    • Just wow! Expands WAY more than I expected.
Expanded beautifully. If you are looking to fill a very large void or something like I did, this is the stuff. I was building an insulated cover for a water hydrant that I need to use all winter. I used two bits of sonotube 40" tall. One was 24" dia and one was 18" inserted inside the other one. I used this stuff to fill the gap and it was perfect. I bought the half gallon set and am very pleased. ... show more
Reviewed in the United States on October 26, 2023 by David Cottrell
    • Good product
Worked as directed, if you poor too much it will definitely come over th e top
Reviewed in the United States on August 21, 2024 by Kindle Customer
    • One gallon total. Not one gallon each container.
Review Image by wadelex wadelex
-Had to replace the flotation 20”x12”x48” comportment of a boat Im refitting. Once i saw the size of the containers I didn’t think it would be enough. Luckily it was more than enough. -Pops off quickly so better be ready to pour once stirred. -No complaints.
Reviewed in the United States on August 9, 2024 by wadelex wadelex

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