---
product_id: 53127764
title: "Bostik Flashband Self Adhesive Flashing Tape for Roofs Grey -50mm x 10m - Provides an Instant Watertight Seal"
brand: "bostik"
price: "¥4503"
currency: JPY
in_stock: true
reviews_count: 13
category: "Bostik"
url: https://www.desertcart.jp/products/53127764-bostik-flashband-self-adhesive-flashing-tape-for-roofs-grey-50mm
store_origin: JP
region: Japan
---

# 50mm x 10m size Hand-applied, no tools needed Instant watertight seal Bostik Flashband Self Adhesive Flashing Tape for Roofs Grey -50mm x 10m - Provides an Instant Watertight Seal

**Brand:** bostik
**Price:** ¥4503
**Availability:** ✅ In Stock

## Summary

> 🛡️ Seal it once, forget it forever!

## Quick Answers

- **What is this?** Bostik Flashband Self Adhesive Flashing Tape for Roofs Grey -50mm x 10m - Provides an Instant Watertight Seal by bostik
- **How much does it cost?** ¥4503 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/53127764-bostik-flashband-self-adhesive-flashing-tape-for-roofs-grey-50mm)

## Best For

- bostik enthusiasts

## Why This Product

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

## Key Features

- • **Durability That Lasts:** Proven to stay tight and effective for months, even in harsh weather conditions.
- • **Effortless Application:** Apply with just hand pressure and a seam roller—no special tools or expertise required.
- • **Perfect for Quick Fixes:** Ideal for repairing lead flashing, sealing gutters, mending leaks, and emergency roof repairs.
- • **Universal Compatibility:** Adheres reliably to brick, masonry, metal, tiles, roofing felt, and more for versatile repairs.
- • **Seamless Weatherproofing:** Flexible bitumen strip bonds instantly to most building materials for a permanent, watertight seal.

## Overview

Bostik Flashband is a flexible, self-adhesive bitumen tape designed for instant, permanent watertight sealing on roofs and building materials. Measuring 50mm by 10m, it bonds effortlessly by hand to a wide range of surfaces, providing durable protection against leaks and weather damage without the need for special tools.

## Description

Flexible bitumen strip instantly bonds to building materials, providing a permanent, watertight seal. Easy to apply by hand, no special equipment needed.

Review: Excellent product - I used this very sticky flashing tape to repair rotting, but very dry wood on the lower half of my summer house doors before - the rain arrived. It worked a treat! I used 2x10m rolls and this completed 8 doors perfectly using 4 x15mil wide strips on each door panel (43W x 47H) Don't forget to allow extra for the overlaps... I used very sharp, long-bladed scissors to cut the required strips and it cuts like butter and is easily shaped. I found a knife 'gummed up' very quickly and did not cut nearly as neatly as the scissors. It's worth having some white spirit to hand to clean your tools. Don't be tempted to pull the backing off before you have the flashing in exactly the right position. Once it's stuck it's a nightmare to unstick! Be advised that it comes off the roll wrinkled and there's nothing you can do to iron them out. You can overpaint easily with water based paint. (two coats.) I would recommend for all sorts of jobs.
Review: Didn’t seem that sticky but 6months later still tight on the brick walls. - I got this to seal the polycarbonate roof against the house. The 6m run was easy to fit and used a small roller to press onto the brick work. Didn’t seem sticky but bonded on the wall well and checked after 6 months and it’s still tight on the wall. Very pleased. Great value for money.

## Features

- FLEXIBLE BITUMEN STRIP - Bonds instantly to most building materials to provide a permanent, watertight seal in all climates
- EASY TO APPLY – Can be applied using just hand pressure and a seam roller, No special equipment needed
- USES - Repairing lead flashing, Sealing valley gutters, Mending leaks in drain pipes and guttering, and much more
- BONDS TO MOST MATERIALS - Brick, masonry, slates, metal, terracotta tiles, roofing felt and more
- CONTENTS - 1x Bostik Flashband Self Adhesive Flashing Tape for Roofs, Colour: Grey, 50mm x 10m

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0001P03QA |
| Batteries Required? | No |
| Batteries included? | No |
| Best Sellers Rank | 404 in DIY & Tools ( See Top 100 in DIY & Tools ) 1 in Flashing |
| Colour | Grey |
| Customer Reviews | 4.3 4.3 out of 5 stars (4,803) |
| Date First Available | 24 Oct. 2012 |
| Included components | 1x Bostik Flashband Self Adhesive Flashing Tape for Roofs |
| Item Package Quantity | 1 |
| Item Weight | 640 g |
| Item model number | 196506 |
| Item thickness | Not applicable Millimetres |
| Manufacturer | Bostik |
| Material | Lamination |
| Measurement System | Metric |
| Part number | 196506 |
| Product Dimensions | 5.21 x 15.01 x 15.01 cm; 640 g |
| Size | 50mm x 10m |
| Special Features | Self Adhering |
| Style | Single |

## Product Details

- **Brand:** Bostik
- **Colour:** Grey
- **Material:** Lamination
- **Number of items:** 1
- **Recommended uses for product:** Metal

## Images

![Bostik Flashband Self Adhesive Flashing Tape for Roofs Grey -50mm x 10m - Provides an Instant Watertight Seal - Image 1](https://m.media-amazon.com/images/I/41OU6tAvmOL.jpg)
![Bostik Flashband Self Adhesive Flashing Tape for Roofs Grey -50mm x 10m - Provides an Instant Watertight Seal - Image 2](https://m.media-amazon.com/images/I/41f1pDJP7vL.jpg)
![Bostik Flashband Self Adhesive Flashing Tape for Roofs Grey -50mm x 10m - Provides an Instant Watertight Seal - Image 3](https://m.media-amazon.com/images/I/51-mTdd40PL.jpg)
![Bostik Flashband Self Adhesive Flashing Tape for Roofs Grey -50mm x 10m - Provides an Instant Watertight Seal - Image 4](https://m.media-amazon.com/images/I/51HAQ9wbJnL.jpg)
![Bostik Flashband Self Adhesive Flashing Tape for Roofs Grey -50mm x 10m - Provides an Instant Watertight Seal - Image 5](https://m.media-amazon.com/images/I/51LWT6cdA5L.jpg)

## Questions & Answers

**Q: Can this be used to patch a small hole, internally, within an attic space?**
A: All depends upon the size of the hole, it will adhere to the underside of the tiles or slates, but you will have to cut a piece large enough to ensure it has enough surface area to stick all around the hole permanently.

**Q: Can you use it when wet**
A: You can use it in the wet but best seal is created when everything is dry, I would wait for a dry day to ensure everything is dry then the joint is likely to stay dry for longer.

**Q: Will this adhere satisfactorily to the outside of an asbestos style roof?**
A: Yes it's good stuff

**Q: Would this react with treated timber? Want to use it to protect the top of the joists on my decking to prolong the life.**
A: Flashband works better on outside areas gutters chimney flashings anything exposed to weather for joists use a paint on product Cuprinol maybe

## Customer Reviews

### ⭐⭐⭐⭐⭐ Excellent product
*by B***O on 27 August 2025*

I used this very sticky flashing tape to repair rotting, but very dry wood on the lower half of my summer house doors before - the rain arrived. It worked a treat! I used 2x10m rolls and this completed 8 doors perfectly using 4 x15mil wide strips on each door panel (43W x 47H) Don't forget to allow extra for the overlaps... I used very sharp, long-bladed scissors to cut the required strips and it cuts like butter and is easily shaped. I found a knife 'gummed up' very quickly and did not cut nearly as neatly as the scissors. It's worth having some white spirit to hand to clean your tools. Don't be tempted to pull the backing off before you have the flashing in exactly the right position. Once it's stuck it's a nightmare to unstick! Be advised that it comes off the roll wrinkled and there's nothing you can do to iron them out. You can overpaint easily with water based paint. (two coats.) I would recommend for all sorts of jobs.

### ⭐⭐⭐⭐⭐ Didn’t seem that sticky but 6months later still tight on the brick walls.
*by M***S on 12 October 2025*

I got this to seal the polycarbonate roof against the house. The 6m run was easy to fit and used a small roller to press onto the brick work. Didn’t seem sticky but bonded on the wall well and checked after 6 months and it’s still tight on the wall. Very pleased. Great value for money.

### ⭐⭐⭐⭐ Good product but beware of the size
*by R***Y on 17 November 2025*

I used this to create a waterproof bond between the house and a lean-to, but after about 4-5 months it has slipped/dropped off the wall and has let water in during heavier rainfall. I used the recommended Bostik primer (black markings seen in photos) which I had hoped would mean this wouldn’t happen. I would recommend going for a size (width) larger than you may think, as I will have to redo this again.

## Frequently Bought Together

- Bostik Flashband Self Adhesive Flashing Tape for Roofs, Provides an Instant Watertight Seal, Colour: Grey, 50mm x 10m
- Rubber Roller, Ideal for Anti Skid Tape Construction Tools, Print, Ink and Stamping Tools (Black, 6.5CM)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-01-25*