---
product_id: 6326307
title: "3M Marine Adhesive Sealant 4000 UV (05280), Medium Strength Flexible Waterproof Adhesive Sealant for Boats and RVs, UV Resistant, Cures in 24 Hours, White, 3 fl oz Tube"
brand: "3m"
price: "VT6581"
currency: VUV
in_stock: true
reviews_count: 13
category: "3 M"
url: https://www.desertcart.vu/products/6326307-3m-marine-adhesive-sealant-4000-uv-05280-medium-strength-flexible
store_origin: VU
region: Vanuatu
---

# Waterproof & flexible seal 500 PSI tensile strength Superior UV resistance 3M Marine Adhesive Sealant 4000 UV (05280), Medium Strength Flexible Waterproof Adhesive Sealant for Boats and RVs, UV Resistant, Cures in 24 Hours, White, 3 fl oz Tube

**Brand:** 3m
**Price:** VT6581
**Availability:** ✅ In Stock

## Summary

> ⚓ Seal it like a pro—marine toughness that won’t quit!

## Quick Answers

- **What is this?** 3M Marine Adhesive Sealant 4000 UV (05280), Medium Strength Flexible Waterproof Adhesive Sealant for Boats and RVs, UV Resistant, Cures in 24 Hours, White, 3 fl oz Tube by 3m
- **How much does it cost?** VT6581 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/6326307-3m-marine-adhesive-sealant-4000-uv-05280-medium-strength-flexible)

## 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

- • **Flexible Yet Firm:** Medium-strength elastomeric sealant that allows disassembly without compromising hold
- • **UV-Proof Confidence:** Maintains color & integrity even under relentless sun exposure
- • **Instant Paintability:** Paint over wet sealant within 60 minutes with water-based paints—no wait, no hassle
- • **Unmatched Durability:** Withstands shock, vibration, swelling & shrinking for long-lasting bonds
- • **Marine-Grade Versatility:** Perfect for aluminum, wood, gel coat & fiberglass above or below waterline

## Overview

3M Marine Adhesive Sealant 4000 UV is a medium-strength, moisture-curing sealant designed for marine and industrial use. It delivers a flexible, waterproof bond with exceptional UV resistance and tensile strength of 500 PSI, suitable for aluminum, wood, gel coat, and fiberglass surfaces both above and below the waterline. Paintable when wet and durable against environmental stress, it’s the trusted choice for professionals demanding reliable, long-lasting seals.

## Description

3M Marine Adhesive Sealant 4000 UV is a one-component, medium-strength, moisture-curing, gap-filling sealant that cures to form a firm, flexible and waterproof seal on aluminum, wood, gel coat and fiberglass, making it well-suited for marine applications above or below the waterline. This product offers excellent UV resistance for reliable long term performance.

Review: Best RV Sealant Ever... - Works better than any standard RV sealant. I always use marine quality items on my RV... They last longer and perform better on the road.
Review: If this can't seal it, it can't be sealed - Moving to a new house, we unknowingly let a vinyl lined hot tub (Softub) sit in the summer air upside down for three months. BIG mistake. This resulted in several rips and tears (including one 2 feet by 6 inches!) in the inverted sagging of the long-water-dependant vinyl. We thought our hot tub was a goner. Tried numerous hot tub rip repair kits, and none of them worked well enough for this major repair job. The hot tub was aging and had served us well for nearly a decade, so we didn't want to purchase a complete replacement liner because of the price - either fix it or toss it. Vinyl patches provided were strong enough, but none of the vinyl patch kit adhesives were able to really withstand the stresses of a full 300 gallon water load on the stretchable vinyl. We made all repairs while tub was empty so as to obtain the best seal. In addition to vinyl-specific glues and patch kit adhesives, we tried vinyl contact cement, shower pan liner adhesive, and every single type of PVC/vinyl glue at the local home improvement store. Not even Loctite plastic bonder would hold once the hot tub was full and chlorine was added to the water. As a last resort, we decided to give this "below the waterline" "hull repair" "permanently flexible" sealant a try - and WOW! it sticks to everything. We gave it a good cure of several days (this was outdoors in winter, so took a bit longer). We used this to adhere the vinyl patches to the tub' vinyl liner, to each other, and to feather around the edges so as to prevent bathers from tearing up the sides or water working the sides loose from the jets. 2 months in to this repair, from which no other product/system/glue previously lasted longer than a week. Much impressed by the miracles of modern petroleum strength commercial chemical derivatives - nicely done 3M!

## Features

- COLOR STABLE: Maintains its color in applications above and below the water line
- PAINTABLE WHEN WET: Forms a skin in 30-60 minutes but can be painted over with water-based paints immediately after application
- EXCELLENT UV RESISTANCE: A distinct ability to withstand the sun's rays allows it to excel in challenging outdoor industrial, transportation, and construction environments
- MULTI-PURPOSE MARINE SEALANT: This medium-strength marine sealant bonds portholes, deck fittings, rub rails, screw holes, and stanchion supports while still allowing disassembly
- For industrial/occupational use only. Not for consumer sale or use
- FLEXIBLE BONDS: Durable elastomeric adhesion maintains joint movement and withstands stress caused by shock, vibration, swelling and shrinking

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0000AY0ND |
| Best Sellers Rank | #4,114 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #53 in Adhesive Caulk #107 in Industrial Sealants #6,112 in Hardware |
| Brand Name | 3M |
| Color | White |
| Compatible Material | Plastic |
| Container Type | Tube |
| Customer Reviews | 4.6 4.6 out of 5 stars (1,916) |
| Full Cure Time | 24 Hours |
| Global Trade Identification Number | 00051135052808 |
| Included Components | Adhesive Sealant |
| Item Form | Liquid |
| Item Package Quantity | 1 |
| Item Type Name | 3M Marine Adhesive Sealant 4000 UV (05280), Medium Strength Flexible Waterproof Adhesive Sealant for Boats and RVs, UV Resistant, Cures in 24 Hours, White, 3 fl oz Tube |
| Item Weight | 3.2 Ounces |
| Manufacturer | 3M |
| Material Type | Plastic |
| Model | 4000UV |
| Number of Pieces | 1 |
| Other Special Features of the Product | special_feature |
| Part Number | 00051135052808 |
| Specific Uses For Product | specific_uses_for_product |
| Tensile Strength | 500 Pounds Per Square Inch |
| UPC | 051135052808 |
| Unit Count | 1.0 Count |
| Viscosity Level | Medium to High |
| Volume | 3 Fluid Ounces |
| Warranty Description | Warranty |
| Water Resistance Level | Waterproof |

## Product Details

- **Brand:** 3M
- **Item Form:** Liquid
- **Material:** Plastic
- **Special Feature:** special_feature
- **Specific Uses For Product:** specific_uses_for_product

## Images

![3M Marine Adhesive Sealant 4000 UV (05280), Medium Strength Flexible Waterproof Adhesive Sealant for Boats and RVs, UV Resistant, Cures in 24 Hours, White, 3 fl oz Tube - Image 1](https://m.media-amazon.com/images/I/61dKb3-u0dL.jpg)

## Available Options

This product comes in different **Color, Size** options.

## Questions & Answers

**Q: is it paintable?**
A: I did use a permanent marker to match my convertible to to the glued glass window

**Q: Can I use this as a glue/sealer on my wooden hot tub?**
A: This is low strength. I would choose at least a medium strength silicone sealer.

**Q: Will this work to seal the top on a raised roof van?**
A: 3M Marine 4000 UV Adhesive is an excellent UV resistant caulk. The 4000 is especially designed for fiberglas and teak. If you want the toughest structural waterproof joint use the 3M 5200. Do not use the 5200 if you plan to take the raised part off. Once cured the 5200 forms a tenacious glued together joint.

**Q: does this caulk contain polyurethan?**
A: No, unless it goes by another name.  I did not see it listed on the label.  -Jim

## Customer Reviews

### ⭐⭐⭐⭐⭐ Best RV Sealant Ever...
*by T***R on February 1, 2026*

Works better than any standard RV sealant. I always use marine quality items on my RV... They last longer and perform better on the road.

### ⭐⭐⭐⭐⭐ If this can't seal it, it can't be sealed
*by S***Y on March 11, 2013*

Moving to a new house, we unknowingly let a vinyl lined hot tub (Softub) sit in the summer air upside down for three months. BIG mistake. This resulted in several rips and tears (including one 2 feet by 6 inches!) in the inverted sagging of the long-water-dependant vinyl. We thought our hot tub was a goner. Tried numerous hot tub rip repair kits, and none of them worked well enough for this major repair job. The hot tub was aging and had served us well for nearly a decade, so we didn't want to purchase a complete replacement liner because of the price - either fix it or toss it. Vinyl patches provided were strong enough, but none of the vinyl patch kit adhesives were able to really withstand the stresses of a full 300 gallon water load on the stretchable vinyl. We made all repairs while tub was empty so as to obtain the best seal. In addition to vinyl-specific glues and patch kit adhesives, we tried vinyl contact cement, shower pan liner adhesive, and every single type of PVC/vinyl glue at the local home improvement store. Not even Loctite plastic bonder would hold once the hot tub was full and chlorine was added to the water. As a last resort, we decided to give this "below the waterline" "hull repair" "permanently flexible" sealant a try - and WOW! it sticks to everything. We gave it a good cure of several days (this was outdoors in winter, so took a bit longer). We used this to adhere the vinyl patches to the tub' vinyl liner, to each other, and to feather around the edges so as to prevent bathers from tearing up the sides or water working the sides loose from the jets. 2 months in to this repair, from which no other product/system/glue previously lasted longer than a week. Much impressed by the miracles of modern petroleum strength commercial chemical derivatives - nicely done 3M!

### ⭐⭐⭐⭐⭐ excellent product
*by B***N on March 30, 2026*

This is the best sealer I have ever used, the self-leveling is a great tool that allows the flow into the cracks, also sets up quickly, I did apply this stuff while it was above70 degrees which I believe helped with the cure time It may cost a little more but trust me it is well worth it for sealing the roof on my car trailer.

## Frequently Bought Together

- 3M Marine Adhesive Sealant 4000 UV (05280), Medium Strength Flexible Waterproof Adhesive Sealant for Boats and RVs, UV Resistant, Cures in 24 Hours, White, 3 fl oz Tube
- 3M Marine Adhesive Sealant Fast Cure 5200 (06535) Permanent Bonding and Sealing for Boats and RVs Above and Below the Waterline Waterproof Repair, White, 1 fl oz Tube
- 3M Marine Grade Silicone Sealant, 08019, For Boats and RVs, Above the Waterline Interior/Exterior Sealing, Clear, 3 fl oz Tube

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*Product available on Desertcart Vanuatu*
*Store origin: VU*
*Last updated: 2026-05-08*