--- product_id: 13105063 title: "FGCI Polyurethane Expanding Liquid Foam 1/2 Gallon Kit, 4 Lb Density 2 Part Marine Foam, 1 Quart Each Part A and Part B, Made in the USA" brand: "fgci" price: "S$101" currency: SGD in_stock: true category: "Fgci" url: https://www.desertcart.sg/products/13105063-fgci-polyurethane-expanding-liquid-foam-1-2-gallon-kit-4 store_origin: SG region: Singapore --- # 2-part rapid expanding foam 4 lb density for marine-grade strength Made in USA with 60+ years expertise FGCI Polyurethane Expanding Liquid Foam 1/2 Gallon Kit, 4 Lb Density 2 Part Marine Foam, 1 Quart Each Part A and Part B, Made in the USA **Brand:** fgci **Price:** S$101 **Availability:** ✅ In Stock ## Summary > 🛠️ Expand Your Projects, Not Your Worries! ## Quick Answers - **What is this?** FGCI Polyurethane Expanding Liquid Foam 1/2 Gallon Kit, 4 Lb Density 2 Part Marine Foam, 1 Quart Each Part A and Part B, Made in the USA by fgci - **How much does it cost?** S$101 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/13105063-fgci-polyurethane-expanding-liquid-foam-1-2-gallon-kit-4) ## Best For - fgci enthusiasts ## Why This Product - Trusted fgci brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Versatile Void Filler:** Seamlessly fills hulls, cavities, and transoms with rigid, closed-cell foam for lasting durability. - • **Marine-Grade 4 Lb Density:** Optimized for superior flotation, structural integrity, and insulation in harsh environments. - • **Compact & Ready-to-Use Kit:** Half-gallon size fits perfectly in your toolkit for on-demand professional repairs. - • **Precision-Mixed 2-Part Formula:** Pre-measured quart kits ensure flawless, rapid expansion every time. - • **Trusted American Craftsmanship:** Manufactured in Florida by Fiberglass Coatings, backed by six decades of marine innovation. ## Overview FGCI Polyurethane Expanding Liquid Foam is a premium 2-part marine foam kit with 4 lb density, designed for rapid expansion and rigid closed-cell structure. Ideal for boat flotation, void filling, and insulation, it delivers reliable strength and buoyancy. Made in the USA by Fiberglass Coatings, leveraging over 60 years of marine expertise, this half-gallon kit offers precise mixing and professional-grade performance for demanding applications. ## Description "FGCI Polyurethane Expanding Liquid Foam 1/2 Gallon Kit in 4 Lb density is a two-part structural foam engineered for marine flotation, void fill, and insulation applications. Includes 1 quart each parts A and B for accurate mixing.When mixed, the liquid foam expands rapidly to fill voids, hulls, and hollow cavities, then cures to a rigid, closed-cell structure. 4 Lb density provides a balance of structural strength and flotation suited to the intended application.Made in the USA by Fiberglass Coatings, LLC in Saint Petersburg, Florida, with over 60 years of marine and composite expertise." ## Features - 2 PART EXPANDING FOAM: Two-part polyurethane foam expands rapidly when mixed, filling voids, hulls, and hollow cavities with a rigid, closed-cell structure. - 4 Lb DENSITY: 4 Lb density balances structural strength and flotation, suiting marine flotation, void fill, and insulation applications appropriate to the rating. - COMPLETE 1/2 Gallon KIT: Includes 1 quart each of part A and part B, giving you accurate, pre-measured quantities for reliable mix ratios straight out of the kit. - MARINE AND STRUCTURAL USE: Engineered for boat flotation, transom fill, pontoon foam, void packing, and general insulation where rigid closed-cell foam is required. - MADE IN THE USA: Manufactured by Fiberglass Coatings, LLC in Saint Petersburg, Florida, backed by over 60 years of marine and composite coatings expertise. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B007V21IQK | | Best Sellers Rank | #124,054 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #163 in Urethane Adhesives | | Date First Available | April 17, 2012 | | Is Discontinued By Manufacturer | No | | Item Weight | 5.3 pounds | | Item model number | 135436 | | Manufacturer | Fiberglass Coatings | | Product Dimensions | 9 x 2 x 7 inches | ## Images ![FGCI Polyurethane Expanding Liquid Foam 1/2 Gallon Kit, 4 Lb Density 2 Part Marine Foam, 1 Quart Each Part A and Part B, Made in the USA - Image 1](https://m.media-amazon.com/images/I/71d1Fx-5xzL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: I need a closed cell foam to mold a motorcycle seat. Would this be the correct foam to use?** A: Hello Richard, this product is not recommended for molding motorcycle seats as it is firm. You will need to use memory foam. - Thank you, FGCI Customer Service **Q: what color is it when dry?** A: It drys to an off yellow|Amber color, this particular foam is extremely rigid as well. **Q: Making a form fitted seat cushion which of your products would suit me best. water and fire resistant, sand able, glue able. density? black. tks** A: This stuff i purchaced is by no means a cushion soft. If anything its like cement!! **Q: Can this be painted latex paint once cured?** A: Oh yes its HIGH DENCITY. (SP) ?? Very tuff stuff. Very dence. And can be formed ## Frequently Bought Together - Polyurethane Expanding Liquid Foam 1/2 Gallon KIT, 4 LB Density Polyurethane Foam, Includes 1 Quart of A & 1 Quart Part B, 2 Part Polyurethane Marine Foam - TotalBoat 5:1 Marine Epoxy Resin Kit for Bonding, Filleting, Coating, and Laminating - Use for Fiberglass, Wood, Carbon Fiber, Boat Building, Repairs, Woodworking (Gallon, Slow Hardener, Pumps) - Lifeboat Urethane Pour Foam - 2lb Density - 1 Gallon Kit 2-Part Closed Cell Rigid Pour Foam - Fast-Acting Formula - Great for Boat Buoyancy, Flotation, Filling, Soundproofing, & Insulation --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.sg/products/13105063-fgci-polyurethane-expanding-liquid-foam-1-2-gallon-kit-4](https://www.desertcart.sg/products/13105063-fgci-polyurethane-expanding-liquid-foam-1-2-gallon-kit-4) --- *Product available on Desertcart Singapore* *Store origin: SG* *Last updated: 2026-07-10*