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Product Details

Mix TotalBoat 2-Part Polyurethane Flotation Foam in equal parts and pour in place to soundproof, insulate, provide buoyancy, and even create art. Pourable foam has 94% closed-cell structure to resist absorbing water, and is unaffected by gas or oil. Available in 2 lb & 6 lb density.

2 pound density foam is great for filling voids in non-structural applications. Can be poured beneath decks and inside cavities to provide buoyancy, and has a flotation range of 75 lbs/qt and 300 lbs/gal.

6 pound density foam has higher compressive strength, ideal for filling cavities to support heavy loads. Its smaller cell structure makes it a popular choice for uses ranging from buoys to sculptures. Its flotation range is 23 lbs/qt and 92 lbs/gal.

Both have been tested in accordance with U.S. Coast Guard Regulation # 33 CFR 183.114.

Available in 2-Quart and 2-Gallon Kits.

Tech Specs
Technical Specifications 2 LB. Density Foam 6 LB. Density Foam
Mix Ratio by WEIGHT 100 Resin:109 Activator 100 Resin:100 Activator
Mix Ratio by VOLUME 1 part Resin : 1 part Activator 1 part Resin : 1 part Activator
Cream Time 45 seconds 65 seconds
Gel Time 235 seconds 150 seconds
Tack-Free Time 380 seconds 215 seconds
Rise Time 400 seconds 200-250 seconds
Flotation (Admixed) 75 lbs/qt; 300 lbs/gal 23 lbs/qt; 92 lbs/gal
Application Temperature 60-85°F (75-85°F is optimal for yield and cure/working times) 60-85°F (75-85°F is optimal for yield and cure/working times)
Yield: 2-Quart Kit 2 cubic ft. 3/4 cubic ft.
Yield: 2-Gallon Kit 8 cubic ft. 3.0 cubic ft.
Weight 9.4 lbs/gal (resin), 10.2 lbs/gal (activator) 9.0 lbs/gal (resin), 10.2 lbs/gal (activator)
Storage 33-95°F - DO NOT ALLOW TO FREEZE 33-95°F - DO NOT ALLOW TO FREEZE
Info & Guides
2-Part Polyurethane Flotation Foam Specifications:
  • The lightweight, 2 lb. density foam is commonly used for filling voids, filling under decks, and practically any other flotation or insulation application.
  • 6 lb. density foam is used for architectural castings, support applications, and has virtually an unlimited number of potential uses.
  • The densities shown refer to the weight per cubic foot of expanded foam (12 in. x 12 in. x 12 in.)
  • 2 lb. density foam expansion: One 2-Quart Kit expands to approximately 2 cubic ft.; one 2-Gallon Kit expands to approximately 8 cubic ft.
  • 6 lb. density foam expansion: One 2-Quart Kit expands to approximately 3/4 cubic ft.; one 2-Gallon Kit expands to approximately 3 cubic ft.
  • All expansion rates and times given are temperature critical. Temperatures below 75 degrees F will lower the expansion rate, which will require more foam. The ideal working temperature is 75 to 80 degrees F, or higher.
  • Accurate measuring of these products is extremely critical.
  • Once fully cured, either foam can be laminated over with any type of polyester, epoxy, or vinyl ester resin without melting. Polyurethane foam is compatible with both epoxy and polyester resin systems.
  • This product can be poured in multiple layers, with excellent bonding between layers.
  • Working time before foaming: Approximately 45 seconds (2 lb. density) to 65 seconds (6 lb. density).
  • Time before full expansion: Approximately 5 minutes

WARNING: The 6 LB. Density Flotation Foam Activator can expose you to chemicals including ethylene glycol, which is known to the State of California to cause birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov

Reviews for TotalBoat 2 Part Expanding Polyurethane Flotation Foam

10 of 92 Reviews

February 19, 2024

Good Test Results
By Capt. Jack from Punta Gorda, FL

Verified Purchase

I mixed a small amount of this liquid to observe it the properties of the resulting foam. I was generally impressed. Two ounces of liquid (1 oz. each) resulted in 32 oz (volume) of foam. So a 16:1 expansion ratio. The form was easy to cut and did not absorb water that i could tell.

Bottom Line Yes, I would recommend to a friend

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January 2, 2024

Got the Job Done
By Neil R. from Kansas City

Verified Purchase

Replaced all original foam in a '88 Lund we're restoring. Two cavities in the stern and two bench seats. Took a little over 3 sets of product. Very happy with the results.

Bottom Line Yes, I would recommend to a friend

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December 7, 2023

This product worked great
By Jeff from Wisconsin

Verified Purchase

I should have had the temp higher when I did it for more volume.


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September 30, 2023

worked great. follow directions.
By JB from Sausalito, CA

Verified Purchase

foamed in a oddly shaped holding tank w/ 6lb foam. drill mixer and an infrared thermometer were handy tools to have. make sure everything is at recommended temperature or expansion rate will vary.

Bottom Line Yes, I would recommend to a friend

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August 29, 2023

Outstanding Product!
By Mr. Bob from Pennsylvania

Verified Purchase

Rebuilding an Aluminum boat


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August 22, 2023

Outstanding Product!
By Mr. BOb from PA

Verified Purchase

I am a Youtube Content Creator and the next project I am working on now is a 1976 Smoker Craft. A complete rebuild. I had purchased other (2 Part-closed cell) products that were twice the cost. Since this is the first time I am using pour foam, I didn't know how much I needed. The folks at Jamestown were awesome the chat with. I will be giving them a "Shout Out" on my channel when I am finished the project.

Bottom Line Yes, I would recommend to a friend

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August 11, 2023

I would buy this product again.
By Joe from Wisconsin

Verified Purchase

Worked as advertised

Bottom Line Yes, I would recommend to a friend

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December 19, 2022

Endless possibilities
By Bill's Exotic accessories from Lakewood, Co

Verified Purchase

Used polyurethane Flotation Foam to make a Kayak last summer. Worked out fantastic excellent water craft will provide pics. This year am using it for making light weight strong as heck custom terrariums for keeping small animal's and plants indoors. Really amazing foam if used according to directions there are endless possibilities for application.

Purple people eater
Bottom Line Yes, I would recommend to a friend

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August 23, 2022

Product performed exactly as advertised!
By Dennis the Menace from Austin, TX

Verified Purchase

Minor comment: The cans are labeled as net contents 1 Qt. Not quite sure what "net contents" means but contents are definitely less than one liquid quart. However, as long as contents are mixed as directed (1 to 1), the end results are perfect. :-)

Bottom Line Yes, I would recommend to a friend

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July 28, 2022

Very solid structural foam
By EJ from Nashville, TN

Verified Purchase

Using it to rebuild flooring in 1970 Correct Craft Freeport. Correct Craft made liberal use of foam to support the floor in addition to wood. Kept a lot of the old foam, but had to discard some of it that was too saturated with water. When cured it is extremely solid, yet easy to cut and shape to a fair surface.

Bottom Line Yes, I would recommend to a friend

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