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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Fiberglass Supply Depot 4 Pounds. Density Expansion Foam, 2-Part PU Closed Cell Liquid Foam for Boat Flotation and Dock, Acoustic Insulation, Vaz Fill

Product ID: 680856745

Details

Brand
Fiberglass
Manufacturer
Fiberglass
Material
Foam Resin
Number of Items
1
Recommended uses for product
Flotation

🔇Closed-cell foam for soundproofing

⏱️5 min full expansion time

🛥️4 lbs density for robust flotation

$290.75

Duties & taxes included

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Sold byAmazon USADelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

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

MULTI PURPOSE USE CASES - Perfect for soundproofing, insulation, sculpting, casting, and even taxidermy—unlock creative and practical potential.
VERSATILE COMPATIBILITY - Seamlessly laminates with polyester, epoxy, or vinyl ester resins without melting, ensuring durable finishes.
SUPERIOR BUOYANCY SUPPORT - 4LB density foam designed to handle moderate loads, perfect for boat flotation and gas tank support.
TEMPERATURE OPTIMIZED PERFORMANCE - Best results at 75°-80°F; precise mixing critical to maximize expansion and strength.
RAPID EXPANSION EASY APPLICATION - Expands fully in just 5 minutes with a quick 45-second working time—ideal for efficient project completion.

Fiberglass Supply Depot’s 4LB Density Expansion Foam is a high-performance 2-part polyurethane closed-cell foam delivering 2 cubic feet of durable, buoyant, and soundproof material. Engineered for boat flotation, insulation, and versatile crafting applications, it cures quickly and bonds with common resins without damage. Ideal for professionals demanding reliable strength and multi-functionality in one kit.

Specifications

ASIN	B08T2195F8
Brand Name	Fiberglass Supply Depot
Coverage	2 cubic feet
Customer Reviews	4.4 4.4 out of 5 stars (247)
Manufacturer	Fiberglass Supply Depot Inc.
Manufacturer Part Number	FBAPOLY4LBGK
Material Type	Foam, Resin
Recommended Uses For Product	Flotation, Soundproofing, Insulation, Filling Voids, Sculpting, Casting
UPC	819794022934
Unit Count	192 Milliliters

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