---
product_id: 337073066
title: "– Butyl Seal Putty Tape | 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) | Black"
brand: "llpt"
price: "€ 66.59"
currency: EUR
in_stock: true
reviews_count: 13
category: "Llpt"
url: https://www.desertcart.hr/products/337073066-butyl-seal-putty-tape-3mm-thick-x-19mm-wide-x
store_origin: HR
region: Croatia
---

# Black synthetic rubber, non-drying Waterproof & airtight protection 3mm thick for durable sealing – Butyl Seal Putty Tape | 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) | Black

**Brand:** llpt
**Price:** € 66.59
**Availability:** ✅ In Stock

## Summary

> 🖤 Seal it once, seal it right — the ultimate no-leak confidence tape!

## Quick Answers

- **What is this?** – Butyl Seal Putty Tape | 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) | Black by llpt
- **How much does it cost?** € 66.59 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-3mm-thick-x-19mm-wide-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

- • **Value & Reliability:** 10 meters per roll doubles the length of competitors, delivering premium performance without compromise.
- • **Weatherproof Warrior:** Blocks wind, water, dust, oil, and corrosive chemicals for indoor/outdoor peace of mind.
- • **Effortless Application:** Moldable, mess-free tape with instant adhesion—perfect for quick, professional repairs.
- • **Precision Seal Mastery:** 3mm thickness ensures a robust, long-lasting barrier against leaks and drafts.
- • **Versatile Surface Compatibility:** Adheres flawlessly to glass, metal, wood, plastic, and more—even on jagged or curved surfaces.

## Overview

LLPT Butyl Seal Putty Tape is a 3mm thick, black synthetic rubber tape designed for airtight, waterproof sealing on a variety of surfaces. Its high viscosity and elasticity provide shock absorption and long-lasting protection against leaks, wind, dust, and chemicals. With easy molding and instant adhesion, this 10-meter roll offers superior value and professional-grade performance for indoor and outdoor repairs.

## Description

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

Review: Good Stuff - Used this to repair a inner door lining on my car which wasn’t stuck down properly allowing a little water leak, easy to apply and stuck the lining down very well so fingers crossed no more leak.
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 |
| Batteries Required? | No |
| Batteries included? | No |
| Best Sellers Rank | 7,469 in DIY & Tools ( See Top 100 in DIY & Tools ) 11 in Butyl Tape |
| Colour | 1 X Black |
| Customer Reviews | 4.5 4.5 out of 5 stars (2,633) |
| Date First Available | 28 Jan. 2021 |
| Finish | Black |
| Installation method | Self-Adhesive |
| Item Package Quantity | 1 |
| Item Weight | 830 g |
| Item model number | BST343 |
| Item thickness | 3 Millimetres |
| Manufacturer | LLP International Group |
| Material | ROHS Rubber |
| Maximum weight capacity | 500 Grams |
| Package Dimensions | 21.5 x 21.4 x 4.2 cm; 830 g |
| Part number | BST343 |
| Shape | Circular |
| Size | 19MM X 10M |
| Special Features | Strong |
| Style | 1 X Black |

## Product Details

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

## Images

![– Butyl Seal Putty Tape | 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) | Black - Image 1](https://m.media-amazon.com/images/I/71R6blhra0L.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

### ⭐⭐⭐⭐⭐ Good Stuff
*by N***L on 23 February 2025*

Used this to repair a inner door lining on my car which wasn’t stuck down properly allowing a little water leak, easy to apply and stuck the lining down very well so fingers crossed no more leak.

### ⭐⭐⭐⭐⭐ 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.

### ⭐⭐⭐⭐ Mess free sticky
*by F***D on 24 May 2024*

Easy to use doesn't set in the tube doesn't make a huge mess to clean up. Sticks very well. A great alternative to sickaflex on non load baring joins

## 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)
- Dicor 551LSB-1 HAPS-Free NON-Leveling Lap Sealant - 10.3 Oz, Black, Secure, Ideal for RV Roofing, Maintenance, Repair, Appliance Application
- 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-3mm-thick-x-19mm-wide-x](https://www.desertcart.hr/products/337073066-butyl-seal-putty-tape-3mm-thick-x-19mm-wide-x)

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-03-06*