---
product_id: 41927704
title: "3M 540 Polyurethane Sealant Adhesive Black Marine Grade 10.5 oz Cartridge"
brand: "3m"
price: "€ 6.61"
currency: EUR
in_stock: false
reviews_count: 1
url: https://www.desertcart.nl/products/41927704-3m-540-polyurethane-sealant-adhesive-black-marine-grade-10-5
store_origin: NL
region: Netherlands
---

# Waterproof 300 psi Tensile Strength 90 Min Skin Time 3M 540 Polyurethane Sealant Adhesive Black Marine Grade 10.5 oz Cartridge

**Brand:** 3m
**Price:** € 6.61
**Availability:** ❌ Out of Stock

## Summary

> 🌊 Seal Your Success with 3M!

## Quick Answers

- **What is this?** 3M 540 Polyurethane Sealant Adhesive Black Marine Grade 10.5 oz Cartridge by 3m
- **How much does it cost?** € 6.61 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.nl](https://www.desertcart.nl/products/41927704-3m-540-polyurethane-sealant-adhesive-black-marine-grade-10-5)

## Best For

- 3m enthusiasts

## Why This Product

- Trusted 3m brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Safety First:** Smoke and flame rated, meeting ASTM standards for peace of mind.
- • **Seal the Deal:** Experience a 90-minute skin time for quick applications.
- • **Marine Mastery:** Engineered for submerged waterproof applications—perfect for marine environments.
- • **Versatile Bonding:** Adheres to a wide range of materials including plastics, metals, and wood.
- • **Paintable Perfection:** Easily paintable after tack-free for seamless integration into your projects.

## Overview

The 3M 540 Polyurethane Sealant Adhesive is a marine-grade solution designed for superior bonding and waterproofing. With a quick skin time of 90 minutes and the ability to bond to various materials, this sealant is perfect for both professional and DIY projects. It meets stringent safety standards and is paintable, making it a versatile choice for any application.

## 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

## 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
- Delivers great performance with tensile strength of 300 psi.

## Images

![3M 540 Polyurethane Sealant Adhesive Black Marine Grade 10.5 oz Cartridge - Image 1](https://m.media-amazon.com/images/I/61awrvAWdQL.jpg)

## Questions & Answers

**Q: Will a regular silicone gun work with this cartridge? Or does it need a fancier one (like those made by 3M)?**
A: Yes it will work but is better to have a gun with a top and bottom bar. I use itout of the freezer which is tougher to use. If used at room temp it works fine in stanard gun.

**Q: Is the color black? Just want to make sure**
A: yes

**Q: Does it neeed a primer to bind a metal panel to fiberglass gelcoat?**
A: No primer is required, however they recommend you sandpaper the fiberglass gelcoat to give it a better profile to grab hold of.

## Customer Reviews

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    ... which makes it softer than 550 but its still super tough and hard
  

*by B***Y on Reviewed in the United States on February 27, 2018*

3m 550 is for similar materials & 540 disimilar which makes it softer than 550 but its still super tough and hard. The specs read better than urethane seal for automotive and my neighbor does ice machine repair in tx with it so re did my car's weld seals. scraped clean, sanded, primed, sealed, 3m 540, primed, sealed, painted, clear coat. no more leaks. we'll see about longevity but the results appear great.Plan your project and have what you are doing ready. Tube is rated to last 24hrs after opening. I got 48 hrs out of it. 3M website has a chemical recommendation to make smoothing the surface easier.  I would assume using something else may compromise the product integrity. I used acetone to clean up but not on the product where applying to protect product integrity. Didn't have time to order other 3M product to smooth down bead, but most places will be hidden by car paneling so not a big deal for me.

---

## 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.nl/products/41927704-3m-540-polyurethane-sealant-adhesive-black-marine-grade-10-5](https://www.desertcart.nl/products/41927704-3m-540-polyurethane-sealant-adhesive-black-marine-grade-10-5)

---

*Product available on Desertcart Netherlands*
*Store origin: NL*
*Last updated: 2026-01-27*