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FiberglassSupplyDepotInc

Fiberglass Supply Depot Inc offers premium 2-part polyurethane expanding pour foam kits in various densities for boat flotation, insulation, soundproofing, and void filling, plus urethane adhesives for industrial applications.

7 products Updated March 4, 2026

FiberglassSupplyDepotInc Products (7)

1
Prime

Fiberglass Supply Depot 8 lb Density Expanding Polyurethane Pour Foam Gallon Kit - High-Strength Structural Fill & Reinforcement

FiberglassSupplyDepotInc
9.9
ProductReviews.org score rating is a scoring system developed by our experts. The score is from 0 to 10 based on the data collected by the ProductReviews.org tool. This score doesn't impact from any manufacturer or sales agent websites. We encourage you to write a review of your experiences with these products. Learn more »
Pros & Cons

Pros

  • Very high density ensures structural grade strength and rigidity
  • Closed-cell design excels in water resistance
  • Simple equal-part mixing for straightforward application
  • Fully versatile post-cure for machining and coating
  • Ideal for high-strength void filling and reinforcement

Cons

  • Lower expansion rate yields less volume per kit
  • Limited suitability for flotation due to high density
  • Requires accurate mixing for optimal curing
2
Prime

Fiberglass Supply Depot 2 lb Density Expanding Pour Foam - 2-Part Polyurethane Closed Cell Kit for Boat Flotation, Soundproofing & Insulation (2 Gal)

FiberglassSupplyDepotInc
9.8
ProductReviews.org score rating is a scoring system developed by our experts. The score is from 0 to 10 based on the data collected by the ProductReviews.org tool. This score doesn't impact from any manufacturer or sales agent websites. We encourage you to write a review of your experiences with these products. Learn more »
Pros & Cons

Pros

  • Very high expansion rate maximizes coverage from small kit
  • Excellent for marine flotation and nonstructural void filling
  • Good water resistance and sound dampening properties
  • Semi-rigid once cured, suitable for lightweight cores

Cons

  • Expansion and cure times are highly temperature-sensitive below 75°F
  • Requires precise equal-part measuring for optimal results
  • Low-moderate compressive strength limits to nonstructural use
3
Prime

Fiberglass Supply Depot 4 lb Density Expanding Pour Foam: 2-Part Polyurethane Closed Cell Kit for Boat Flotation, Insulation & Soundproofing (2 Gallon)

FiberglassSupplyDepotInc
9.8
ProductReviews.org score rating is a scoring system developed by our experts. The score is from 0 to 10 based on the data collected by the ProductReviews.org tool. This score doesn't impact from any manufacturer or sales agent websites. We encourage you to write a review of your experiences with these products. Learn more »
Pros & Cons

Pros

  • High expansion efficiency covers more area with less material
  • Moderate rigidity and compressive strength for structural use
  • Closed-cell design prevents water absorption
  • Quick cure time for fast project turnaround
  • Compatible with multiple resin types without degradation

Cons

  • Expansion rate drops in temperatures below 75°F, requiring more product
  • Short 45-second working time demands precise and quick mixing
  • Accurate measurement of parts A and B is critical for best results
4
Prime

Fiberglass Supply Depot 2 lb Density Expanding Pour Foam - 2-Part Polyurethane Closed Cell Kit for Boat Flotation, Insulation, Soundproofing (1 Gallon)

FiberglassSupplyDepotInc
9.7
ProductReviews.org score rating is a scoring system developed by our experts. The score is from 0 to 10 based on the data collected by the ProductReviews.org tool. This score doesn't impact from any manufacturer or sales agent websites. We encourage you to write a review of your experiences with these products. Learn more »
Pros & Cons

Pros

  • Very high expansion rate yields up to 5 cubic feet from 1 gallon kit
  • Excellent for marine flotation and void filling
  • Closed cell design ensures strong water resistance
  • Versatile for sound dampening and insulation
  • Quick cure time for efficient projects

Cons

  • Requires precise equal-part measuring and 75-80°F temps for optimal expansion
  • Low-moderate compressive strength limits to non-structural uses
  • Short 45-second working time demands fast application
5
Prime

Fiberglass Supply Depot 4 lb Density Expanding Pour Foam: 2-Part Polyurethane Closed Cell for Boat Flotation, Insulation, Soundproofing (1 Gallon Kit)

FiberglassSupplyDepotInc
9.7
ProductReviews.org score rating is a scoring system developed by our experts. The score is from 0 to 10 based on the data collected by the ProductReviews.org tool. This score doesn't impact from any manufacturer or sales agent websites. We encourage you to write a review of your experiences with these products. Learn more »
Pros & Cons

Pros

  • Very good water resistance and flotation performance
  • Versatile for multiple applications including marine and structural
  • Can be laminated over without melting once cured
  • Moderate expansion rate for controlled pours
  • Rigid result supports medium-duty structural needs

Cons

  • Expansion rate drops below 75°F, requiring more product
  • Requires precise equal-part mixing and 45-second working time
  • Temperature-sensitive for optimal results above 75°F
6
Prime

Fiberglass Supply Depot 6 lb Density Expanding Pour Foam Kit - 2-Part Polyurethane Closed Cell Foam for Boat Flotation, Insulation, Soundproofing (1 Gallon)

FiberglassSupplyDepotInc
9.6
ProductReviews.org score rating is a scoring system developed by our experts. The score is from 0 to 10 based on the data collected by the ProductReviews.org tool. This score doesn't impact from any manufacturer or sales agent websites. We encourage you to write a review of your experiences with these products. Learn more »
Pros & Cons

Pros

  • Very rigid with high compressive strength for load-bearing applications
  • Excellent water resistance and closed-cell structure for reliable flotation
  • Versatile for insulation, soundproofing, and creative carving projects
  • Expands to 1.5 cubic feet, providing efficient coverage
  • Cures strong enough for lamination with various resins

Cons

  • Requires precise equal-part measuring for proper expansion
  • Short 45-second working time demands quick application
  • Optimal performance needs 75-80°F temperatures; colder conditions reduce expansion
7
Prime

Fiberglass Supply Depot 2 lb Density Expanding Pour Foam: 2-Part Polyurethane Closed Cell Kit for Boat Flotation, Insulation & Soundproofing (Quart)

FiberglassSupplyDepotInc
9.6
ProductReviews.org score rating is a scoring system developed by our experts. The score is from 0 to 10 based on the data collected by the ProductReviews.org tool. This score doesn't impact from any manufacturer or sales agent websites. We encourage you to write a review of your experiences with these products. Learn more »
Pros & Cons

Pros

  • Very high expansion rate maximizes coverage with minimal material
  • Excellent water resistance and flotation performance
  • Versatile for soundproofing, insulation, and void filling
  • Closed-cell design prevents moisture absorption
  • Quick curing allows fast project turnaround

Cons

  • Expansion and performance are temperature-sensitive below 75°F
  • Requires precise equal-part measuring for optimal results
  • Fast 45-second working time limits use in large pours

FiberglassSupplyDepotInc Brand Guide

Fiberglass Supply Depot Inc is a trusted name in specialty materials, renowned for its expanding pour foam kits and urethane adhesives. These products cater to a wide range of applications, from marine construction and insulation to crafting and industrial bonding, making them essential for hobbyists, builders, and professionals seeking durable, high-performance solutions.

Brand Overview

Fiberglass Supply Depot Inc focuses on delivering reliable polyurethane-based products designed for toughness and versatility. Their lineup includes closed-cell expanding pour foams in densities like 2 lb and 4 lb, ideal for creating buoyant structures in boats and docks, as well as filling voids, providing soundproofing, and offering thermal insulation. Complementing these are their urethane adhesives, which excel in strong, flexible bonds for demanding industrial environments.

What sets Fiberglass Supply Depot Inc apart is their commitment to quality formulations that expand uniformly and cure into rigid, water-resistant materials. Users appreciate the ease of use in these 2-part liquid foam systems, which mix and pour effortlessly to deliver professional results without specialized equipment.

Product Quality and Reputation

The brand's products are engineered for reliability, featuring closed-cell structures that resist moisture and maintain structural integrity over time. This makes them a go-to choice for applications where longevity matters, such as marine flotation or automotive sound deadening. Fiberglass Supply Depot Inc has built a solid reputation among DIY enthusiasts and industry experts for consistent performance across kit sizes, from quarts to gallons.

Quality control ensures each kit provides predictable expansion ratios and strong adhesion properties, reducing waste and enhancing project outcomes. Whether sealing gaps or creating custom cushions, these materials stand up to real-world stresses.

Who Are These Products Best For?

Fiberglass Supply Depot Inc products shine for marine enthusiasts restoring boats, builders insulating structures, and crafters needing firm pillow forms or foam supports. They're also perfect for industrial users requiring robust urethane adhesives for assembly and repairs.

  • Boat and dock builders seeking flotation solutions
  • Homeowners tackling soundproofing or insulation projects
  • Crafters in Pillow Forms & Foam for sewing and upholstery
  • Professionals in heavy-duty bonding with Urethane Adhesives

Key Product Categories

Explore their offerings in specialized categories that align with practical needs. In the Sewing Notions & Supplies area, their foams serve as sturdy inserts for pillows and cushions, combining craft utility with industrial strength. For tougher jobs, check Industrial Adhesives, where urethane options provide unbeatable flexibility and durability.

These categories highlight the brand's versatility, bridging hobbyist crafting with professional-grade applications like void filling and structural support.

Frequently Asked Questions

What is expanding pour foam used for?

Expanding pour foam from Fiberglass Supply Depot Inc is used for boat and dock flotation, soundproofing, filling irregular voids, and insulation. Its closed-cell structure makes it lightweight yet buoyant and moisture-resistant.

What are the density options available?

The brand offers 2 lb and 4 lb density kits. Lower density provides more volume for flotation, while higher density delivers firmer support for structural uses.

How do I use the 2-part polyurethane foam kits?

Mix the two liquid components in the specified ratio, pour into the desired area, and allow it to expand and cure. Always follow safety guidelines and work in a well-ventilated space.

Are these products suitable for marine applications?

Yes, the closed-cell foams are specifically formulated for boat flotation, resisting water absorption and providing long-lasting buoyancy.

What makes urethane adhesives from this brand special?

They offer strong, flexible bonds that withstand vibration, temperature changes, and moisture, ideal for industrial and heavy-duty assembly tasks.