Can you use on basement cracks

The foam is made to fill voids in boats for flotation and is not structurally strong. That said, it will fill cracks as long as you're not depending on it for strength. After it is poured, it will expand. It pours like water so it might be difficult to get it where you want it on vertical walls. Easy to pour on a floor crack but not strong enough to walk on.

What is the flotation range for the 2g kit? will it support 1500 to 2000 lb floating dock?

1 cubic foot of 2 lb. Polyurethane close cell foam will float 60.2 lbs. per US Coast Guard regulations of Flotation. So by the their formula it should float about 480 lbs. of weight. So no you would need 6 2 gallon kits to float just the dock. That's not counting any weight of people that stand on the dock ....

How much does this cover?

A two gallon kit (1 gallon resin + 1 gallon activator) will yield 8 cubic feet which is equal to 59.84 gallons. 1 cubic foot equals 7.48 gallons.

Can the 2lb product be used to fill the void in my kayak made of high-density polyethylene or will it deform?

It should work just fine. Use a smaller amount at first and then mixed more as needed until the void was filled. I was not not sure how much it would expand so I started with a smaller amount . It expands and hardens quickly. I don't think it will deform your kayak, but it will expand out of any cracks and holes, but you can cut off any foam you don't want.

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TotalBoat 2 Lb Density Expanding Foam Kit, 2 Part Closed Cell Pourable Polyurethane for Boat Flotation, Insulation, Reinforcement and Void Filling (2 Gallon Kit)

TotalBoat 2 Lb Density Expanding Foam Kit, 2 Part Closed Cell Pourable Polyurethane for Boat Flotation, Insulation, Reinforcement and Void Filling (2 Gallon Kit)

Product ID: 23482186

Details

Brand
TotalBoat
Manufacturer
TotalBoat
Material
Polyurethane
Recommended Uses For Product
Thermal Sound
UPC
811932022103

💧94% closed cell - superior water resistance

⏱️5 min cure time - rapid hardening

⚖️2 lb density - ultra lightweight strength

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Description

🚤 Float, Fill, and Fortify Like a Pro — Stay Ahead of the Wave!

READY WHEN YOU ARE - Optimal working temp 75-85°F ensures peak expansion and rigidity in just minutes.
MARINE GRADE DURABILITY - USCG-compliant closed cell foam resists water, oil, and solvents—built to last on the water.
MULTI FUNCTIONAL MASTERY - From buoyancy to soundproofing and insulation, one kit covers all your marine and DIY needs.
EFFORTLESS 1 1 MIX POUR - Simplify your project with a foolproof equal-part formula that expands rapidly for flawless fills.
PRECISION LAYERING FOR PERFECT RESULTS - Pour in stages to build strength and shape complex voids with zero shrinkage.

TotalBoat’s 2 lb density expanding polyurethane foam kit delivers fast-setting, closed cell foam engineered for marine flotation, insulation, and soundproofing. With a simple 1:1 mix ratio and rapid 5-minute cure time, it offers superior water resistance and structural reinforcement for nonstructural applications. US Coast Guard compliant and versatile, this 2-gallon kit yields up to 8 cubic feet of durable, lightweight foam perfect for boat decks, pontoons, and creative DIY projects.

Specifications

ASIN	B01AAP3ILC
Best Sellers Rank	#21,936 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #31 in Boat Painting Supplies
Brand	TotalBoat
Brand Name	TotalBoat
Coverage	8 cubic feet
Customer Reviews	4.6 out of 5 stars 1,028 Reviews
Included Components	resin and hardener
Item Type Name	polyurethane foam
Item Weight	20 Pounds
Manufacturer	TotalBoat
Manufacturer Part Number	TB-FOAM
Material	Polyurethane Resin
Material Type	Polyurethane Resin
Model Number	TB-FOAM
Number of Items	1
Number of Packs	1
Recommended Uses For Product	Thermal Insulation, Sound Insulation, Flotation, Gap Filling, Nonstructural Support
UPC	811932022103
Unit Count	256.0 Fluid Ounces

Reviews

E**L

30.03.2026

B**H

3.01.2024

S**E

1.05.2026

C**L

5.12.2017

D**Y

18.06.2019

A**R

19.02.2026

F**0

18.06.2023

M**Y

24.05.2018

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