--- product_id: 41927701 title: "3M 540 (Gray) Marine Grade 20-oz Polyurethane Sealant Adhesive 600mL Sausage Pack (CASE of 12 Each)" brand: "industrial 3m sealants" price: "S$601" currency: SGD in_stock: true category: "Industrial 3 M Sealants" url: https://www.desertcart.sg/products/41927701-3m-540-gray-marine-grade-20-oz-polyurethane-sealant-adhesive store_origin: SG region: Singapore --- # Waterproof & submersible 90 min skin time Bonds 10+ materials 3M 540 (Gray) Marine Grade 20-oz Polyurethane Sealant Adhesive 600mL Sausage Pack (CASE of 12 Each) **Brand:** industrial 3m sealants **Price:** S$601 **Availability:** ✅ In Stock ## Summary > 🛠️ Seal it fast, seal it strong, seal it smart! ## Quick Answers - **What is this?** 3M 540 (Gray) Marine Grade 20-oz Polyurethane Sealant Adhesive 600mL Sausage Pack (CASE of 12 Each) by industrial 3m sealants - **How much does it cost?** S$601 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/41927701-3m-540-gray-marine-grade-20-oz-polyurethane-sealant-adhesive) ## Best For - industrial 3m sealants enthusiasts ## Why This Product - Trusted industrial 3m sealants brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Elastic Strength:** Withstands ±25% joint movement, ensuring long-lasting flexibility and crack resistance. - • **Fast-Track Fixes:** Tack-free in just 60 minutes to keep your projects moving at lightning speed. - • **Marine-Grade Durability:** Certified waterproof and submersible after full cure—built to brave the elements. - • **Universal Bonding Power:** Seamlessly adheres to plastics, metals, masonry, wood, and more for versatile applications. - • **Cost-Effective Excellence:** Premium 3M quality at half the price of comparable marine sealants—value meets performance. ## Overview 3M 540 Marine Grade Polyurethane Sealant is a high-performance, fast-curing adhesive designed for demanding construction and marine applications. It forms a permanent, elastic, waterproof bond to a wide range of materials including metals, plastics, and masonry. With a quick 60-minute tack-free time and full cure waterproofing within 24-48 hours, it offers superior durability and flexibility at a competitive price point. ## Description M Polyurethane Sealant 540 is a high performance, fast curing, one component, moisture curing product which forms a permanent elastic bond to a wide variety of materials including plastics, FRP, SMC, aluminum, masonry, steel, coated metal, and wood. This product is ideally suited for a number of construction applications including; expansion joints, control joints, doors and windows, aluminum curtain walls and storefront glass, as well as precast and tilt-up construction. 3M Polyurethane Sealant 540 is Tack-free in 60 minutes per ASTM C679, features a Joint movement capability of ±25%, and once fully cured is suitable for Submerged waterproof applications. Comparable to 3M 5200 Marine sealant but half the price! Meets ASTM C-920 ( 00068060471994 , 50068060471999 , 50068060471999 , 70068060471993 ) ## Features - 90 Minute Skin Time, Paintable after Tack-Free - Waterproof, Marine Grade, and Suitable for Submerged waterproof applications after 24-48 hours - Bonds to; Plastics, FRP, SMC, Concrete, Brick, Masonry, aluminum, steel, coated metal, and wood - Smoke, and Flame Rated, Meets ASTM C-920, ASTM C679 - 00068060471994 , 50068060471999 , 50068060471999 , 70068060471993 ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B071R6D9HM | | Best Sellers Rank | #256,752 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #105 in Polyurethane Adhesives #270 in Urethane Adhesives | | Brand | Industrial 3M Sealants | | Brand Name | Industrial 3M Sealants | | Color | gray | | Customer Reviews | 5.0 out of 5 stars 1 Review | | Full Cure Time | 24 hours | | Included Components | Item | | Initial Hardening Time | 60 minutes | | Item Form | Paste | | Item Weight | 0.27 g | | Liquid Volume | 600 ml | | Manufacturer | Scotch Seal | | Model | 540 | | Number of Items | 12 | | Number of Packs | 12 | | Part Number | 540 | | Surface Recommendation | Miscellaneous | | Tensile Strength | 250 psi | | UPC | 700287223535 | | Unit Count | 12 Count | | Water Resistance Level | Waterproof | ## Product Details - **Brand:** Industrial 3M Sealants - **Full Cure Time:** 24 hours - **Initial Hardening Time:** 60 minutes - **Item Weight:** 0.27 g - **Liquid Volume:** 600 ml ## Images ![3M 540 (Gray) Marine Grade 20-oz Polyurethane Sealant Adhesive 600mL Sausage Pack (CASE of 12 Each) - Image 1](https://m.media-amazon.com/images/I/51uUMOph3RL.jpg) ![3M 540 (Gray) Marine Grade 20-oz Polyurethane Sealant Adhesive 600mL Sausage Pack (CASE of 12 Each) - Image 2](https://m.media-amazon.com/images/I/51MIWE5byGL.jpg) ![3M 540 (Gray) Marine Grade 20-oz Polyurethane Sealant Adhesive 600mL Sausage Pack (CASE of 12 Each) - Image 3](https://m.media-amazon.com/images/I/41fu2FyAHjL.jpg) ![3M 540 (Gray) Marine Grade 20-oz Polyurethane Sealant Adhesive 600mL Sausage Pack (CASE of 12 Each) - Image 4](https://m.media-amazon.com/images/I/71lMJb3RgOL.jpg) ## Questions & Answers **Q: Is this compatible with Icf blocks? (Polystyrene)** A: Yes, ICF is one of the things I used it on ## Frequently Bought Together - 3M 540 (Gray) Marine Grade 20-oz Polyurethane Sealant Adhesive 600mL Sausage Pack (CASE of 12 Each) - ZIP System Liquid Flash | 29 oz. Cartridge | Weather-Resistant | Flashing Sealant (29oz Cartridge) - ZIP System Huber Flashing Tape | Self-Adhesive Flashing for Doors-Windows Rough Openings (3.75" x 30') --- ## 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/41927701-3m-540-gray-marine-grade-20-oz-polyurethane-sealant-adhesive](https://www.desertcart.sg/products/41927701-3m-540-gray-marine-grade-20-oz-polyurethane-sealant-adhesive) --- *Product available on Desertcart Singapore* *Store origin: SG* *Last updated: 2026-11-04*