---
product_id: 51946952
title: "Bostik Flexacryl Instant Repair – Black"
brand: "bostik"
price: "854 zł"
currency: PLN
in_stock: null
reviews_count: 5
category: "Bostik"
url: https://www.desertcart.pl/products/51946952-bostik-flexacryl-instant-repair-black
store_origin: PL
region: Poland
---

# Instant waterproofing with one coat Durable black matte finish 1-hour full cure time Bostik Flexacryl Instant Repair – Black

**Brand:** bostik
**Price:** 854 zł
**Availability:** ❌ Out of Stock

## Summary

> 🛠️ Fix it fast, fix it smart — waterproofing that works when you need it most!

## Quick Answers

- **What is this?** Bostik Flexacryl Instant Repair – Black by bostik
- **How much does it cost?** 854 zł with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/51946952-bostik-flexacryl-instant-repair-black)

## 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

- • **Matte Black Finish:** Seamlessly blends with flat roofs for a professional, discreet look.
- • **Rapid One-Coat Application:** Get immediate waterproof protection in just one coat—no waiting around.
- • **Trusted Outdoor Durability:** Designed specifically for flat roofs and gutters, built to last.
- • **Flexible & Fiber-Reinforced:** Bridges gaps with long-lasting flexibility to withstand roof movement.
- • **Works on Wet or Dry Surfaces:** Apply confidently even in damp conditions for emergency fixes anytime.

## Overview

Bostik Flexacryl Instant Repair is a high-performance, fiber-reinforced waterproof compound designed for flat roofs and gutters. It cures fully in just 1 hour, providing a flexible, durable matte black finish that works on both wet and dry surfaces. Ideal for emergency repairs or routine maintenance, this 5kg tin delivers instant, one-coat waterproofing to protect your roof with professional-grade reliability.

## Description

Free delivery and returns on all eligible orders. Shop Bostik Flexacryl Instant Repair Waterproof Compound for Flat Roofs, Colour: Black, 5kg.

Review: Good waterproofing for flat roofs - Brilliant stuff just very sticky and just throw brush away when finished
Review: doesn't go on as well on a damp surface so best wait for a dry day - I have used alot of this product recently.doesn't go on as well on a damp surface so best wait for a dry day. I have no hesitation in buying more when the time comes.

## Features

- Flammable liquid and vapour.
- A high performance, instant roof repair compound, ideal for emergency repairs or general waterproofing
- One coat application providing immediate waterproofing
- For wet or dry surfaces, Can be applied in damp conditions
- Flexible and long lasting, Contains fibres to bridge gaps
- Contents: 1x Bostik Flexacryl Instant Repair for Flat Roofs, Colour: Black, 5kg

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00G96Y8RU |
| Age Range Description | Adult |
| Best Sellers Rank | 223,878 in DIY & Tools ( See Top 100 in DIY & Tools ) 202 in Waterproofers |
| Brand Name | Bostik |
| Colour | Black |
| Colour Code | #000000 |
| Container Type | Tin |
| Coverage | one-coat waterproofing |
| Customer Reviews | 4.7 4.7 out of 5 stars (12) |
| Dry Time In Hours | 1 |
| Finish Type | Matte |
| Full Cure Time | 1 Hours |
| Global Trade Identification Number | 05021523175100 |
| Included Components | 1x Bostik Flexacryl Instant Repair for Flat Roofs, Colour: Black, 5kg |
| Indoor Outdoor Usage | Outdoor |
| Is Waterproof | True |
| Item Form | Paste |
| Item Type Name | Waterproof Compound |
| Item Volume | 5 Kilograms |
| Manufacturer | Bostik |
| Model Number | 30811957 |
| Paint Type | Waterproof Compound |
| Part Number | 30811957 |
| Product Warranty | No guarantee |
| Size | 1 kg (Pack of 1) |
| Special Features | Long Lasting, Flexible |
| Specific Uses For Product | Flat Roofs and Gutters |
| Surface Recommendation | Roof |
| Unit Count | 1000.0 Grams |
| Water Resistance Level | Waterproof |

## Product Details

- **Brand:** Bostik
- **Colour:** Black
- **Finish type:** Matte
- **Item volume:** 5 Kilograms
- **Paint type:** Waterproof Compound
- **Size:** 1 kg (Pack of 1)
- **Special feature:** Long Lasting, Flexible
- **Specific uses for product:** Flat Roofs and Gutters
- **Surface recommendation:** Roof
- **Unit count:** 1000.0 Grams

## Images

![Bostik Flexacryl Instant Repair – Black - Image 1](https://m.media-amazon.com/images/I/61kGhiFC6AL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good waterproofing for flat roofs
*by D***E on 22 November 2025*

Brilliant stuff just very sticky and just throw brush away when finished

### ⭐⭐⭐⭐⭐ doesn't go on as well on a damp surface so best wait for a dry day
*by M***L on 4 September 2016*

I have used alot of this product recently.doesn't go on as well on a damp surface so best wait for a dry day. I have no hesitation in buying more when the time comes.

### ⭐⭐⭐⭐⭐ Five Stars
*by M***R on 1 October 2015*

This is great just what it says on the tin would recommend

## Frequently Bought Together

- Bostik Flexacryl Instant Repair Waterproof Compound for Flat Roofs, Colour: Black, 5kg
- Harris Essentials Masonry Paint Brush, 4",Black

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**Shop now:** [https://www.desertcart.pl/products/51946952-bostik-flexacryl-instant-repair-black](https://www.desertcart.pl/products/51946952-bostik-flexacryl-instant-repair-black)

---

*Product available on Desertcart Poland*
*Store origin: PL*
*Last updated: 2026-04-25*