can this be cut with hot wire ?

Yes, but it is high density. It will not cut as easily as Styrofoam

Does this require moisture to cure?

This will not cure with moisture present.

whats the difference between 2#,4# & 6#? is the polyurethane hydrophobic or hydrophilic?

To clarify, each density of foam has a different expansion rate, so they are all used for different applications. Please refer to the reference chart of each listing for details regarding expansion. This material is hydrophobic. -FSD

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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2lb Density Expanding Cast Foam, 2-Piece Polyurethane Closed Cell Liquid Foam for Boat and Dock Flotation, Sound Insulation, Filling Gaps and Insulation (1 Gallon Kit)

2lb Density Expanding Cast Foam, 2-Piece Polyurethane Closed Cell Liquid Foam for Boat and Dock Flotation, Sound Insulation, Filling Gaps and Insulation (1 Gallon Kit)

Product ID: 733261437

Details

Brand
Fiberglass
Manufacturer
Fiberglass
Material
Resin
Number of Items
2
UPC
819794022859

🧊2lb density for superior buoyancy

🧪1 gallon kit yields 5 cubic feet foam

⏱️5 min full expansion time

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C$26324

Duties & taxes included

In stock

Sold byAmazon NicaraguaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🚤 Elevate your float game with foam that works as hard as you do!

FLOAT ABOVE THE REST - 2lb density closed-cell foam delivers unmatched buoyancy for boats and docks.
RAPID RISE NO COMPROMISE - Expands fully in just 5 minutes, saving you time on every project.
PRECISION POUR PERFECT FIT - Equal parts mix with a 45-second working window ensures flawless application.
BUILT TO LAST READY TO COAT - Cured foam resists melting and accepts polyester, epoxy, or vinyl ester coatings.
VERSATILE INSULATION SOUNDPROOFING - Ideal for filling gaps, insulating, and soundproofing non-structural spaces.

This 2lb density, 2-piece polyurethane closed-cell foam kit produces 5 cubic feet of expanding foam designed for buoyancy, insulation, and soundproofing. It cures in 5 minutes, can be coated with common resins, and is optimized for use between 75°-80°F, making it perfect for boat and dock flotation or gap filling.

Specifications

ASIN	B08RP8DNDB
ASIN	B08RP8DNDB
Brand Name	Fiberglass Supply Depot
Customer Reviews	4.6 4.6 out of 5 stars (273)
Customer reviews	4.6 4.6 out of 5 stars (273)
Date First Available	30 May 2025
Item model number	Poly2lbgk
Manufacturer	Fiberglass Supply Depot Inc.
Manufacturer	Fiberglass Supply Depot Inc.
Manufacturer Part Number	Poly2lbgk
Material Type	Resin
Model Number	Poly2lbgk
Package Dimensions	25.91 x 23.8 x 17.09 cm; 4.79 kg
UPC	819794022859

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