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

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
Material
Resin
Colour
Clear
Item package quantity
1
Package information
Can

🧊2lb density for superior buoyancy

🧪1 gallon kit yields 5 cubic feet foam

⏱️5 min full expansion time

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€ 273.74

Duties & taxes included

In stock

Sold byAmazon FranceDelivered 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
Best Sellers Rank	#15,640 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #35 in Urethane Adhesives
Brand Name	Fiberglass Supply Depot
Color	Clear
Compatible Material	Fiberglass
Container Type	Can
Customer Reviews	4.5 4.5 out of 5 stars (250)
Full Cure Time	5 Minutes
Item Form	Liquid
Item Package Quantity	1
Manufacturer	Fiberglass Supply Depot Inc.
Material Type	Foam
Model	Poly2lbgk
Specific Uses For Product	Flooring, Repair, Wall Repair, Woodworking, Casting
UPC	819794022859
Unit Count	128.0 Fluid Ounces
Viscosity	Medium to High
Volume	1 Gallons
Water Resistance Level	Water Resistant

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