--- product_id: 98617127 title: "4lb Boat Pour Foam Kit, 1/2 Gallon | Closed-cell foam for flotation, insulation, filling & buoyancy." brand: "true composites" price: "¥14959" currency: JPY in_stock: true category: "True Composites" url: https://www.desertcart.jp/products/98617127-4lb-boat-pour-foam-kit-1-2-gallon-closed-cell store_origin: JP region: Japan --- # Superior soundproofing & insulation Fast 10-min set time 4-lb density closed-cell foam 4lb Boat Pour Foam Kit, 1/2 Gallon | Closed-cell foam for flotation, insulation, filling & buoyancy. **Brand:** true composites **Price:** ¥14959 **Availability:** ✅ In Stock ## Summary > 🛠️ Float, Fill, and Fortify with Foam That Means Business! ## Quick Answers - **What is this?** 4lb Boat Pour Foam Kit, 1/2 Gallon | Closed-cell foam for flotation, insulation, filling & buoyancy. by true composites - **How much does it cost?** ¥14959 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/98617127-4lb-boat-pour-foam-kit-1-2-gallon-closed-cell) ## Best For - true composites enthusiasts ## Why This Product - Trusted true composites brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Layer Like a Pro:** Pour multiple layers with seamless bonding; compatible with polyester, epoxy, and vinyl ester coatings without damage. - • **Mix & Pour in 20 Seconds:** Simple 1:1 ratio with a fast-acting formula that cures fully in just a few hours—get back to work faster. - • **Multi-Functional Masterpiece:** Perfect for flotation, insulation, soundproofing, sculpting, and structural support—one kit, endless possibilities. - • **Soundproof & Insulate Like a Boss:** High-density foam blocks noise and protects pipes in cold temps—ideal for boat and dock applications. - • **Unmatched Durability & Water Resistance:** 95%-98% closed-cell foam resists water, oil, gasoline & salt for years of reliable flotation. ## Overview The True Composites 4lb Boat Pour Foam Kit delivers a high-density, closed-cell urethane foam with 95%-98% cell closure, ensuring exceptional water resistance and durability. Its fast 10-minute set time and easy 1:1 mixing ratio make it ideal for professional-grade flotation, insulation, soundproofing, and structural applications. Compatible with multiple coatings and perfect for layered pours, this versatile kit is a must-have for millennial pros seeking reliable, multi-use solutions for marine and industrial projects. ## Description True Composites 4lb Boat Pour Foam Kit, 1/2 Gallon | Closed-cell foam for flotation, insulation, filling & buoyancy.: desertcart.com: Industrial & Scientific ## Features - ✅ High-Strength & Durable: This two-part liquid pour-foam component system produces foam when Parts A and B are mixed together. It does not contain any CFC blowing agents and has a closed-cell structure that resists water absorption for many years. Once cured, the urethane flotation foam stays intact against solvents, oil, gasoline, fresh or salt water, and features a 95%–98% closed-cell structure with a 4-lb density. - ✅ Easy to Mix & Apply: Just mix at a simple 1:1 ratio to ensure even distribution and the strongest foam possible. This fast-acting formula allows about twenty seconds for mixing and pouring, and the foam sets in place within 10 minutes. It’s fully cured and ready for use in just a few hours. - ✅ Excellent Insulation & Soundproofing: The high-density foam protects boat pipes in colder temperatures and blocks sound, making it ideal for filling dock floats or boat parts for soundproofing and insulation. - ✅ Various Applications: Ideal for casting, carving, sculpture, plug making, sign making, flotation for boats and buoys, floating decoys, part fabrication, replicating wooden parts, rigidifying, structural support and more. - ✅ Versatile & Adaptable: This 2-part liquid pour-foam system can be poured in multiple layers with excellent bonding between them. Once fully cured, the foam can be coated with polyester, epoxy, or vinyl ester resins without melting. Shaping is easy once cured. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07L545RDN | | Best Sellers Rank | #299,973 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #307 in Urethane Adhesives | | Brand Name | TRUE COMPOSITES | | Color | Multicolor | | Customer Reviews | 4.5 4.5 out of 5 stars (43) | | Grade Rating | Industrial | | Item Form | Liquid | | Item Shape | Rectangular | | Manufacturer | TRUE COMPOSITES | | Material | Liquid Foam | | Model Number | 4LBFOAM2QK | | Number of Items | 2 | | Part Number | 4LBFOAM2QK | | UPC | 850019564068 | | Unit Count | 2.0 Count | ## Product Details - **Brand:** TRUE COMPOSITES - **Color:** Multicolor - **Item Form:** Liquid - **Material:** Liquid Foam - **Shape:** Rectangular ## Images ![4lb Boat Pour Foam Kit, 1/2 Gallon | Closed-cell foam for flotation, insulation, filling & buoyancy. - Image 1](https://m.media-amazon.com/images/I/71Nu4APPrGL.jpg) ![4lb Boat Pour Foam Kit, 1/2 Gallon | Closed-cell foam for flotation, insulation, filling & buoyancy. - Image 2](https://m.media-amazon.com/images/I/81eedjSnrSL.jpg) ![4lb Boat Pour Foam Kit, 1/2 Gallon | Closed-cell foam for flotation, insulation, filling & buoyancy. - Image 3](https://m.media-amazon.com/images/I/41Wr75p5o7L.jpg) ![4lb Boat Pour Foam Kit, 1/2 Gallon | Closed-cell foam for flotation, insulation, filling & buoyancy. - Image 4](https://m.media-amazon.com/images/I/61nW-5mhvTL.jpg) ![4lb Boat Pour Foam Kit, 1/2 Gallon | Closed-cell foam for flotation, insulation, filling & buoyancy. - Image 5](https://m.media-amazon.com/images/I/71nJDdF9y-S.jpg) ## Questions & Answers **Q: What color is the expanded product?** A: It is a light beige color. I am using it floatation and painted the exposed surface blue (just because I had blue spray paint and thought it might protect the surface, probably not needed though) **Q: What can you use to break this down? I have some spillover i want to remove. Acetone?** A: Yes, that's what I used and it worked fine. **Q: If mixing by weight is says “100 parts 115parts”??? Is that 100 parts of the A and 115 parts of the B?** A: I do equal amounts **Q: As it expands, does it exert a lot of force on mold it is in?** A: By my experience it does not. But you will need couple of vents to release pressure and overflow. It does heat up and you can feel it. ## Frequently Bought Together - TRUE COMPOSITES Liquid Urethane Pour Foam Base-2 Part Closed Cell Rigid Pour Foam-4 lb Density-Fast-Acting Formula-Boat Buoyancy, Flotation, Filling, Soundproofing & Insulation-1/2 Gallon Kit - 4 Lb. Density Expanding Pour Foam, 2 Part Polyurethane Closed Cell Liquid Foam for Boat and Dock Flotation, Soundproofing, Filling Voids, and Insulation (1 Gallon Kit) --- ## 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.jp/products/98617127-4lb-boat-pour-foam-kit-1-2-gallon-closed-cell](https://www.desertcart.jp/products/98617127-4lb-boat-pour-foam-kit-1-2-gallon-closed-cell) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-07-08*