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 lbs. Density Expansion Foam, 2 Part Polyurethane Closed Cell Liquid Foam for Boat and Dock Flotation, Acoustic Insulation, Void Fill

Fiberglass Supply Depot 4 lbs. Density Expansion Foam, 2 Part Polyurethane Closed Cell Liquid Foam for Boat and Dock Flotation, Acoustic Insulation, Void Fill

Product ID: 680856745

Details

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

🌊2 cubic feet coverage for versatile flotation

⏱️45 sec working time, 5 min full expansion

⚖️4 lbs density for robust support

€ 363.23

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Sold byAmazon CroatiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Elevate your projects with foam that’s fast, firm, and fiercely versatile!

ROCK SOLID SUPPORT - 4LB density foam engineered to withstand moderate loads, perfect for gas tank supports and deck reinforcement.
RAPID REACTION TIME - Mix and apply with a swift 45-second working window and full expansion in just 5 minutes—maximize efficiency on every project.
MULTI FUNCTIONAL MASTERY - Ideal for flotation, soundproofing, insulation, sculpting, casting, and filling voids—one foam to rule them all.
SEAMLESS RESIN COMPATIBILITY - Fully cured foam laminates flawlessly with polyester, epoxy, or vinyl ester resins without melting—engineered for professional finishes.
TEMPERATURE SAVVY PERFORMANCE - Optimized for 75°-80°F working temps to ensure precise expansion and minimal waste—control your craft with confidence.

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 insulating material. Designed for professional-grade flotation, soundproofing, and structural support, it cures rapidly and bonds seamlessly with common resins. Perfect for millennial managers seeking reliable, multi-use solutions that combine efficiency with premium results.

Specifications

ASIN	B08T2195F8
Brand Name	Fiberglass Supply Depot
Coverage	2 cubic feet
Customer Reviews	4.4 4.4 out of 5 stars (255)
Manufacturer	Fiberglass Supply Depot Inc.
Manufacturer Part Number	FBAPOLY4LBGK
Material Type	Foam, Resin
Number of Items	1
Number of Packs	1
Recommended Uses For Product	Flotation, Soundproofing, Insulation, Filling Voids, Sculpting, Casting
UPC	819794022934

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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€ 363.23

Duties & taxes included

In stock

Sold byAmazon CroatiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Croatia.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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