---
product_id: 337073066
title: "Butyl Seal Putty Tape | 1 Pack Black | 3MM Thick x 19MM Wide x 10M Long | Water Tight Seal Butyl Tape | for Leak Proof RV Repair Window Glass Boat Sealing EPDM Roof Patching (BST343)"
brand: "llpt"
price: "€ 37.45"
currency: EUR
in_stock: true
reviews_count: 13
category: "Llpt"
url: https://www.desertcart.hr/products/337073066-butyl-seal-putty-tape-1-pack-black-3mm-thick-x
store_origin: HR
region: Croatia
---

# Water-tight & weatherproof 3MM thick for durable sealing 10M length for extensive coverage Butyl Seal Putty Tape | 1 Pack Black | 3MM Thick x 19MM Wide x 10M Long | Water Tight Seal Butyl Tape | for Leak Proof RV Repair Window Glass Boat Sealing EPDM Roof Patching (BST343)

**Brand:** llpt
**Price:** € 37.45
**Availability:** ✅ In Stock

## Summary

> 💪 Seal it once, seal it right — the ultimate no-drip, no-slip butyl tape!

## Quick Answers

- **What is this?** Butyl Seal Putty Tape | 1 Pack Black | 3MM Thick x 19MM Wide x 10M Long | Water Tight Seal Butyl Tape | for Leak Proof RV Repair Window Glass Boat Sealing EPDM Roof Patching (BST343) by llpt
- **How much does it cost?** € 37.45 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/337073066-butyl-seal-putty-tape-1-pack-black-3mm-thick-x)

## Best For

- llpt enthusiasts

## Why This Product

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

## Key Features

- • **Extended Coverage Roll:** 10 meters of high-viscosity tape means fewer replacements and more projects sealed with confidence.
- • **Precision Seal Mastery:** 3MM thick synthetic rubber ensures a non-drying, flexible, and shock-absorbing seal that lasts through all seasons.
- • **Mess-Free, Instant Adhesion:** Easy to mold and apply with no curing time—get a professional-grade airtight seal in minutes.
- • **Universal Surface Compatibility:** Adheres flawlessly to glass, metal, wood, plastic, and EPDM roofs—perfect for your RV, boat, or home repairs.
- • **Weatherproof & Chemical Resistant:** Blocks wind, water, dust, oil, and corrosive chemicals to keep your space leak-proof and protected.

## Overview

LLPT Butyl Seal Putty Tape is a 3MM thick, 19MM wide, and 10M long synthetic rubber tape designed for airtight, waterproof sealing on diverse surfaces including glass, metal, wood, and plastic. Its non-drying, high-viscosity formula offers shock absorption and chemical resistance, making it ideal for RV repairs, window sealing, and roof patching. Trusted by thousands with a 4.5-star rating, this tape delivers professional-grade durability and mess-free application for indoor and outdoor use.

## Description

LLPT Butyl Seal Putty Tape | 1 Pack Black | 3MM Thick x 19MM Wide x 10M Long | Water Tight Seal Butyl Tape | for Leak Proof RV Repair Window Glass Boat Sealing EPDM Roof Patching (BST343) : desertcart.co.uk: DIY & Tools

Review: Great stuff - Great product, sticks well and should be waterproof. We'll see!
Review: Sticky, sticky..... - I usually buy a mastic based sealant to seal my Motorhome roof windows, after a recommendation from a friend I looked at the Butyl strips as an alternative, the other 'Named' brands were a 5 meter roll for roughly the same cost as this item but this one has 10 meters on the roll so better value straight away. Still a bit sceptical, I installed the tape on the roof and Ohh my word, it sticks, I mean, it really sticks, when you use this you only get one chance to get it right, so be precise and certain you have everything lined up correctly. The window has been fitted and it has sealed perfectly, there was heavy rain that evening and there were no leaks at all. Highly recommend this tape and I certainly won't be going back to the mastics.

## Features

- APPLICATION: Widely used for window and door waterproof reinforcement, airtight sealing, windshield, RV, retrofit, pipe, joint sealing, mobile home, glass, EPDM roof or galvanized metal roofing patching for indoor and outdoor.
- WORKING PATTERNS: Suitable to be use on glass, fiberglass, wood, coated or uncoated metals, plastic, rubber at tight corners, unusual curves, uneven and most jagged surfaces; reliably shut off wind, water, dust, oil, grease, vapor, moisture, corrosive chemical and other leakages; paintable feature is making your installation area a seamless, clean, dry and heavy duty water tight workspace.
- FEATURES: LLPT Butyl Putty Tape (3.5mm/0.14 inch thick) is made of synthetic composited rubber for non-drying, non-hardening and extremely working temperature that provides easy installation, easy forming, quick molding, shock-absorbing, mess free, air tight sealing, waterproof, high viscosity and elasticity.
- EASY TO USE: LLPT Sealant Putty Tape delivers easy molding and instant adhesion to the surface of object. Simply clean the surface first for better bonding and release the butyl tape to areas you want to seal with proper press all around the tape. The ideal installation temperature is around 10 Celsius degree, to low will make the tape stiffer which might need a little bit longer time for molding.
- LLP-TAPES: LLPT produces various tapes for industrial and commercial use with ideal sizes and thickness based on the desires of users. Search on desertcart for other LLPT tapes like PET Repair Tape, Woodworking Tape, Aluminum Foil Tape, Foam Tape, Black/Gray/Clear Acrylic Mounting Tape, Duct Tape, Silicone Tape, Caulking Tape, Gaffer Tape and so on.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08HSY9N76 |
| Best Sellers Rank | 6,662 in DIY & Tools ( See Top 100 in DIY & Tools ) 12 in Butyl Tape |
| Brand | LLPT |
| Colour | 1 X Black |
| Compatible Material | Glass |
| Country Of Origin | China |
| Customer Reviews | 4.5 4.5 out of 5 stars (2,623) |
| Global Trade Identification Number | 07915901300544 |
| Item Dimensions L x W x Thickness | 19W x 3Th millimetres |
| Item Thickness | 3 Millimetres |
| Item Weight | 0.83 Kilograms |
| Manufacturer | LLP International Group |
| Material | ROHS Rubber |
| Number of Items | 1 |
| Other Special Features of the Product | Strong |
| Recommended Uses For Product | Windows and doors, Windshield, Mobile home, Pipes, Joint sealing, Glass, EPDM or metal roofs, Wood, Plastic, Glass |
| Size Name | 19MM X 10M |
| Surface Recommendation | Glass, Metal, Plastic, Wood |
| UPC | 791590130054 |
| Unit Count | 10.0 meter |
| Upper Temperature Rating | 98 Degrees Celsius |
| Water Resistance Level | Water Resistant |

## Product Details

- **Brand:** LLPT
- **Colour:** 1 X Black
- **Material:** ROHS Rubber
- **Number of items:** 1

## Images

![Butyl Seal Putty Tape | 1 Pack Black | 3MM Thick x 19MM Wide x 10M Long | Water Tight Seal Butyl Tape | for Leak Proof RV Repair Window Glass Boat Sealing EPDM Roof Patching (BST343) - Image 1](https://m.media-amazon.com/images/I/61NWVKE74+L.jpg)

## Available Options

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

## Questions & Answers

**Q: Can you roll it like dumdum or bluetac to make a lump to fill a small space that's a bit bigger than the 3mm thick?**
A: Yes as long as you set your hands.

**Q: Hi. How thick is the tape?   Thank you.**
A: 3.5mm thick, 1 inch wide and 33 feet for roll size. The butyl tape is double sided, putty like for water and air tight seal.

**Q: Hi can I use around the bath**
A: Not designed for a bath but there are similar products that are designed for baths

**Q: Could I use this to stop a leak in a shower from between grout, there is movement on the shower tray so I need something flexible?**
A: I would certainly give it a try. Ive used it my windscreen where the seal has perished. works great. Not sure how easy it is to remove. Might use on my shower when the glass has broken free of the old mastic. Bought it to fix the rainscreen back into the car doors. Perfect.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great stuff
*by R***R on 12 February 2026*

Great product, sticks well and should be waterproof. We'll see!

### ⭐⭐⭐⭐⭐ Sticky, sticky.....
*by L***R on 3 January 2025*

I usually buy a mastic based sealant to seal my Motorhome roof windows, after a recommendation from a friend I looked at the Butyl strips as an alternative, the other 'Named' brands were a 5 meter roll for roughly the same cost as this item but this one has 10 meters on the roll so better value straight away. Still a bit sceptical, I installed the tape on the roof and Ohh my word, it sticks, I mean, it really sticks, when you use this you only get one chance to get it right, so be precise and certain you have everything lined up correctly. The window has been fitted and it has sealed perfectly, there was heavy rain that evening and there were no leaks at all. Highly recommend this tape and I certainly won't be going back to the mastics.

### ⭐⭐⭐⭐ Great stuff.
*by C***H on 11 February 2026*

Good stuff, did the job. Worth knowing that if using in any kind of situation where it is squeezed under tension and left over time (I used it for mounting boat rubbing strakes) that it will continue to squeeze out in areas, particularly in hot weather.

## Frequently Bought Together

- LLPT Butyl Tape Black 3/4 Inch x 33Ft Tight Seal for Leak Proof EPDM RV Repair Window Glass Boat Sealing Roof Pipe Patching(BST343)
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- Sika Sikaflex-221 - Black - Multi-Purpose Polyurethane sealant/Adhesive - Creates Permanent Elastic Seal - Sandable/paintable - Non-Corrosive - 10.1 fl oz

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**Shop now:** [https://www.desertcart.hr/products/337073066-butyl-seal-putty-tape-1-pack-black-3mm-thick-x](https://www.desertcart.hr/products/337073066-butyl-seal-putty-tape-1-pack-black-3mm-thick-x)

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-05-17*