would this provide floatation if used in the bow of a kayak?

Yes, that is one of its intended uses. It is a closed cell foam.

Question any way to pump this? I have a void under a concrete walkway and I need to get it back 4 feet The void is 4x4 and 2 to 6 inches deep.

You only have a brown 30 seconds after you mix the product to put it in the location that you are wanting depending on temperature if you have a mixing tip then you could pump it however it needs to be agitated for 20 seconds

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Fiberglass Supply Depot 4 Lb. Density Expanding Pour Foam, 2 Part Polyurethane Closed Cell Liquid Foam for Boat and Dock Flotation, Soundproofing, Filling Voids, and Insulation (Quart Kit)

Fiberglass Supply Depot 4 Lb. Density Expanding Pour Foam, 2 Part Polyurethane Closed Cell Liquid Foam for Boat and Dock Flotation, Soundproofing, Filling Voids, and Insulation (Quart Kit)

Product ID: 273973810

Details

Brand
Fiberglass
Color
Black Clear
Item Form
Liquid
Item Package Quantity
1
Material
Foam Resin

⏱️5 min full cure time

⚖️4 lb density for optimal buoyancy

🌡️Ideal working temp 75-80°F

€ 134.45

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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 floats, fills, and fortifies!

RAPID 5 MINUTE CURE - Get fully cured foam fast to keep your projects moving
PRECISION 2 PART MIX - Equal parts A & B for flawless expansion and performance
VERSATILE CLOSED CELL FOAM - Waterproof, soundproof, and insulates with unmatched durability
SEAMLESS RESIN COMPATIBILITY - Laminates perfectly with polyester, epoxy, or vinyl ester resins
TEMPERATURE SMART APPLICATION - Optimized for 75-80°F to maximize expansion and minimize waste

Fiberglass Supply Depot’s 4 lb density expanding pour foam is a high-performance, 2-part polyurethane closed-cell liquid foam designed for boat and dock flotation, soundproofing, insulation, and filling voids. It cures fully in 5 minutes, is waterproof, and compatible with various resins, making it a versatile solution for professional-grade applications requiring durability and precision.

Specifications

ASIN	B08T255GS5
Best Sellers Rank	#20,801 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #52 in Urethane Adhesives
Brand	Fiberglass Supply Depot
Brand Name	Fiberglass Supply Depot
Color	Black, Clear, Yellow
Compatible Material	Vinyl
Container Type	Bottle
Customer Reviews	4.4 out of 5 stars 148 Reviews
Full Cure Time	5 Minutes
Item Form	Liquid
Item Package Quantity	1
Manufacturer	Fiberglass Supply Depot Inc.
Material	Foam , Resin
Material Type	Foam,Resin
Number of Pieces	2
Other Special Features of the Product	Versatility
Part Number	poly4lbqk
Special Feature	Versatility
Specific Uses For Product	Floating Decoy, Taxidermy
UPC	819794022897
Unit Count	64.0 Ounce
Viscosity Level	Medium to High
Volume	1 Quarts
Water Resistance Level	Waterproof

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Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

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Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

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Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

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.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

Vikram D.

The MOLLE sheath is of exceptional quality. Very happy with my purchase.

2 weeks ago

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€ 134.45

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

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Abdullah B.

Great price for an authentic product. Fast international shipping too!

3 weeks ago

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

View all Trustpilot reviews