---
product_id: 364654375
title: "Waterproof Polyurethane Glue 20.3 fl oz. Bottle Marine Glue for Boats and RVs Natural PU Adhesive for Above and Below The Waterline (1 Pack)"
brand: "mitreapel"
price: "€ 46.96"
currency: EUR
in_stock: true
reviews_count: 8
category: "Mitreapel"
url: https://www.desertcart.nl/products/364654375-waterproof-polyurethane-glue-20-3-fl-oz-bottle-marine-glue
store_origin: NL
region: Netherlands
---

# 100% waterproof marine-grade sealant Withstands extreme heat & cold Versatile on wood, metal, glass & more Waterproof Polyurethane Glue 20.3 fl oz. Bottle Marine Glue for Boats and RVs Natural PU Adhesive for Above and Below The Waterline (1 Pack)

**Brand:** mitreapel
**Price:** € 46.96
**Availability:** ✅ In Stock

## Summary

> 🔧 Seal it once, trust it forever — the ultimate marine glue for pros!

## Quick Answers

- **What is this?** Waterproof Polyurethane Glue 20.3 fl oz. Bottle Marine Glue for Boats and RVs Natural PU Adhesive for Above and Below The Waterline (1 Pack) by mitreapel
- **How much does it cost?** € 46.96 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nl](https://www.desertcart.nl/products/364654375-waterproof-polyurethane-glue-20-3-fl-oz-bottle-marine-glue)

## Best For

- mitreapel enthusiasts

## Why This Product

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

## Key Features

- • **Gap-Filling Precision:** Expands to fill joints without drips or runs on vertical surfaces
- • **Multi-Surface Mastery:** Bonds wood, metal, ceramics, foam, glass, concrete effortlessly
- • **All-Weather Durability:** Resists heat, cold, and moisture for lasting repairs
- • **User-Friendly Application:** No mixing needed; easy spread, stainable, paintable & sandable
- • **Unmatched Waterproof Strength:** Seals above & below waterline with absolute reliability

## Overview

Mitreapel’s Waterproof Polyurethane Glue delivers a robust, 100% waterproof bond ideal for marine and outdoor repairs. Its medium viscosity formula withstands extreme temperatures and moisture, bonding diverse materials like wood, metal, glass, and concrete. Ready-to-use with no mixing, it cures fully in 24 hours, expanding to fill gaps without dripping, and dries paintable and sandable for professional finishes.

## Description

Waterproof Polyurethane Marine Glue, 16 oz. Bottle, Natural Poly Marine Adhesive, PU Adhesive for Marine, Liquid Foaming Underwater Sealant

Review: Excellent product ! - Great substitute for water based glue. When Titebond will cause a warped panel, this is the answer. Easy to spread . drying time is 40 min at 70 degrees. Very Pleased.
Review: Perfect Glue For Items That Will Be Exposed To The Elements - Comes out like syrup, so squeeze lightly; project is moveable in a couple hours and ghe glue expands and dries completely in 24 hours to a very strong bond. You can cut off any excess glue easily with a razor blade/exacto knife. Will update review only if it doesn’t hold up in the rain, otherwise, a great marine glue to work with.

## Features

- Marine waterproof sealant : 100% waterproof. Extreme heat, cold, and water have no effect on glue, ideal for indoor and outdoor repairs.
- Versatile performance : Your solution for almost any project or repair a wood, picture frames, toys, crafts, brick, metal, cement, ceramics, foam, glass, concrete, etc.
- Easy to use & Apply : Roughen up the shiny surfaces, glass, some plastics and metals. Then clean the surfaces and moisturize surface spraying with water.
- Fix & Repairs : Fills small gaps on joints. No runs in vertical surfaces and construction. Dried glue is stainable, paintable and sandable boat construction sealant.
- Solvent free : Original polyurethane strong marine adhesive, requires no mixing, for better results allow cure completely in 1 day.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B097PZWHWX |
| Best Sellers Rank | #85,470 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #469 in Cyanoacrylate Adhesives |
| Brand | Mitreapel |
| Color | Clear |
| Date First Available | June 22, 2021 |
| Full Cure Time | 1 Days |
| Item Form | Liquid |
| Item Package Quantity | 1 |
| Item Volume | 16 Fluid Ounces |
| Item Weight | 1.21 pounds |
| Item model number | UFZ-PA300-1-FBM |
| Manufacturer | Adhesive Guru |
| Material | Polyurethane |
| Number of Pieces | 1 |
| Package Dimensions | 10.24 x 7.24 x 3.15 inches |
| Package Information | Bottle |
| Special Feature | Strong, Strong Waterproof |
| UPC | 769613972943 |
| Unit Count | 20.3 Fluid Ounces |
| Viscosity | Medium |
| Viscosity Level | Medium |
| Water Resistance Level | Waterproof |

## Product Details

- **Brand:** Mitreapel
- **Color:** Clear
- **Item Form:** Liquid
- **Material:** Polyurethane
- **Special Feature:** Strong, Strong Waterproof

## Images

![Waterproof Polyurethane Glue 20.3 fl oz. Bottle Marine Glue for Boats and RVs Natural PU Adhesive for Above and Below The Waterline (1 Pack) - Image 1](https://m.media-amazon.com/images/I/61lfsUnTBgL.jpg)

## Questions & Answers

**Q: Is this the right product to use when adhering a keel protector to the bottom of a thermoformed plastic skin or hdpe kayak?**
A: No it is not, not much sticks to hdpe, I would look at a plastic welder

**Q: Will this work with adhering marine grade carpet on treated lumber for bunk boards on boat trailer for use in saltwater?**
A: No. This glue expands just like expandable foam filler or insulation.

**Q: will this work to glue wood strips to styrofoam in a boat seat?**
A: Depends on the foam. If the glue is compatible with your particular foam, and does not melt it, it would work. Watch the shelf life on this glue. It is only about a year.

**Q: Will this glue work with rubber?**
A: This type of glue is only suited for nonflexible joints.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Excellent product !
*by F***N on April 11, 2025*

Great substitute for water based glue. When Titebond will cause a warped panel, this is the answer. Easy to spread . drying time is 40 min at 70 degrees. Very Pleased.

### ⭐⭐⭐⭐⭐ Perfect Glue For Items That Will Be Exposed To The Elements
*by N***A on January 20, 2026*

Comes out like syrup, so squeeze lightly; project is moveable in a couple hours and ghe glue expands and dries completely in 24 hours to a very strong bond. You can cut off any excess glue easily with a razor blade/exacto knife. Will update review only if it doesn’t hold up in the rain, otherwise, a great marine glue to work with.

### ⭐⭐⭐⭐ Really nice product
*by D***G on October 3, 2024*

Smoother than other brands. Not quite as foamy. Really my favorite of this type of glue. It does expire very quickly. Just to keep around the shop I’d buy the smallest size- you will be throwing it away. I used this on a multiple piece gate post made out of 8x8, and 2x12 treated fir, and 4x4 posts- it’s been almost 2 years- looking fine so far.

## Frequently Bought Together

- Waterproof Polyurethane Glue 20.3 fl oz. Bottle Marine Glue for Boats and RVs Natural PU Adhesive for Above and Below The Waterline (1 Pack)
- Akfix PA370 Express Marine Adhesive (1x15.4 fl.oz) - Extra Strength Wood Glue for Metal & Woodworking, for Furniture Repair, Waterproof Polyurethane Glue for Outdoors & Indoors | 15.4 fl.oz. 1 Pack
- Gorilla Original Gorilla Glue, Waterproof Polyurethane Glue, 8 Ounce Bottle, Brown, (Pack of 1)

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---

*Product available on Desertcart Netherlands*
*Store origin: NL*
*Last updated: 2026-03-01*