What is the compressive strength of the foam, in PCF?

They only give the compressive strength in PSI and that is 78 for the 4lb foam

What is the viscosity of the liquids before they mix?

The best way to describe it would be like warm pancake syrup.

i'm new at this..what does density mean i see 2lb..4lb..6lb? thanks

Think of it as hardness or strength. The 2lb will be more sponge like 6 will be harder.

Can you use pole foam to insulate the walls of a shop? Does it go thru a heat? Will it blister the tyvek or metal on the outside?

It doesn't fill a very big volume like spray foam. It is very liquid and comes out of any cracks. Will set up hard as a rock though.

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🛠️ Float, fill, and fortify—foam that works as hard as you do!

RAPID EXPANSION - Expands fully in just 5 minutes, letting you finish projects faster without sacrificing quality.
PRECISION MIXING - Two-part formula with a 45-second working time ensures exact measurements and flawless results every time.
BUOYANT POWERHOUSE - 4 lb density foam engineered to support moderate loads—perfect for boats, docks, and gas tank stabilization.
TEMPERATURE OPTIMIZED - Best performance at 75-80°F, guaranteeing consistent expansion and maximum coverage.
VERSATILE APPLICATION - Seamlessly laminates with polyester, epoxy, or vinyl ester resins—ideal for sculpting, casting, and soundproofing.

This 4 lb density, two-part polyurethane foam kit delivers 2 cubic feet of closed-cell foam designed for flotation, soundproofing, insulation, and filling voids. With a quick 5-minute expansion and compatibility with multiple resin types, it’s the go-to solution for professionals seeking durable, versatile, and high-performance foam for marine and construction applications.

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Manufacturer	Fiberglass Supply Depot Inc.
Part number	FBAPOLY4LBGK
Item Weight	4.82 kg
Product Dimensions	25.4 x 22.86 x 15.24 cm; 4.82 kg
Manufacturer reference	FBAPOLY4LBGK
Size	Gallon Kit
Material	Polyurethane Foam
Item Package Quantity	1
Coverage	2 cubic feet (volume coverage)
Special Features	Soundproofing, Insulation
Specific uses	Boat, Dock
Batteries included?	No
Batteries Required?	No

4 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)

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