Item Price Qty
24/25-A
4.9 lb. (2 cubic feet)
$34.95
24/25-B
19.3 lb. (9 cubic feet)
$119.95
24/25-C
96.5 lb. (45 cubic feet)
$405.95
Quantity Discounts
4+ $ 369.95  
10+ $ 344.95  
24/25-Drum
1000 lb. (500 cubic feet)
$3,395.95

Fill Cavities for Flotation and Reinforcement

This 2 lb. density foam comes as a two-part kit, both parts equally mixed. It is a closed-cell system, meaning individual cells of foam trap in air and keep liquids out. As a result, it is most frequently used for flotation applications, delivering 60 pounds of float per cubic foot. It can be used to fill cavities for reinforcement and insulation, and can be shaped or carved , once cured, for use as a plug in mold-making or sculpting.

  • 2 lb. foam expands approximately 30 times its liquid volume before cure, and will fill any shape.
  • Once two parts are mixed, it will begin to react and expand within 45 seconds, and will continue for several minutes.
  • Closed-cell structure does not react with oil or gasoline, and will not absorb water.
  • Laminate directly onto foam using epoxy or polyester resin; it can also be used with urethane pigments (#141, #143), latex paint, and parting wax (#1016) when used in-mold.

Before filling cavities for insulation, flotation or reinforcement, determine how much foam you'll need.

  • First, calculate the volume of your container in cubic feet. For example 1 ft. high x 1 ft. long x 2 ft. deep = 2 total cubic feet.
  • Second, for 2 lb. foam, multiply that total by 2.5. In this case, 2 cubic ft. x 2.5 = 5 lb. of required foam.

This foam is designed to meet USCG Title 33, Chapter 1, Part 183 when mixed properly.

Foam kits, when ordered alone, will typically ship in a medium or large box. Where possible, we will combine ordered items to reduce the number of boxes shipped.
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2 lb Density Polyurethane foam Mix
May 19, 2015  |  By Rick T
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Excellent product , performed as planned with nice expansion and finish.. My only concern was the deformed metal gallon cans - Part A and Part B together in the same box with some peanuts...No leakage, but a plastic bag or other leak protection may prevent a real problem if both can leak due to rough handling during shipment.


Fibre Glast
May 12, 2015  |  By Maureen T
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We did not know what product to use to fix a situation. We had a long 90 degree radius pipe down in the ground attached to a utility pole. It was getting water in it and needed to be sealed off. After doing a search on the internet, it seemed like your product might be what we were looking for. We used it the other day, and it was very successful. Thank you for a great product!!


Boat Project
Apr 29, 2015  |  By Bob M
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I replaced the plywood floor in a 15' runabout. I dug out the old (saturated foam) and refoamed with 24/25. By trial and error I met my goal of having a solid / firm floor without using any hardware. I did my floor section by section. I held the plywood in place from above and drilled 3/4" holes. I would pour into one hole and scrape of the excess foam coming out of both holes. I then patched the filler holes with a filled epoxy. Also used 3M 5200 silicone adhesive for laminating and waterproofing the plywood sections. Now that I'm a "polyurethane foam expert", unfortunately, I've completed my first and probably last foam project. My 40 yr fiberglass boat is now good as new.


Pourable Foam
Mar 29, 2015  |  By Renn N
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I recieved my purchase quickly.

2 lb. Polyurethane Mix and Pour Foam

Mix and Pour Foam is a two-part kit, meaning it is one product made up of two containers. It is available in a variety of sizes:

4.9 lb., fills 2 cubic feet (#24/25-A); Both A Side and B Side are quart containers.

19.3 lb., fills 9 cubic feet (#24/25-B); Both A Side and B Side are gallon containers.

*96.5 lb., fills 45 cubic feet (#24/25-C); Both A Side and B Side are 5-gallon containers.

1000 lb., fills 500 cubic feet (#24/25-Drum); Both A Side and B Side are drums)

*Quantity discounts are available on the 96.5 lb. kits only when four or more kits are purchased in one order.

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