---
product_id: 51946952
title: "Bostik Flexacryl Instant Repair for Flat Roofs – Black"
brand: "bostik"
price: "S$272"
currency: SGD
in_stock: true
reviews_count: 6
category: "Bostik"
url: https://www.desertcart.sg/products/51946952-bostik-flexacryl-instant-repair-for-flat-roofs-black
store_origin: SG
region: Singapore
---

# Instant waterproofing on wet/damp surfaces Deep matte black finish 1-hour full cure time Bostik Flexacryl Instant Repair for Flat Roofs – Black

**Brand:** bostik
**Price:** S$272
**Availability:** ✅ In Stock

## Summary

> 🛠️ Fix it fast, fix it smart—roof rescue in a single coat!

## Quick Answers

- **What is this?** Bostik Flexacryl Instant Repair for Flat Roofs – Black by bostik
- **How much does it cost?** S$272 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/51946952-bostik-flexacryl-instant-repair-for-flat-roofs-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

- • **Works Rain or Shine:** Effective on dry or damp surfaces, perfect for unpredictable weather.
- • **One-Coat Instant Shield:** Apply once, waterproof immediately—no waiting, no fuss.
- • **Universal Roof Compatibility:** Seamlessly bonds with felt, asphalt, concrete, metal, and more.
- • **Flexible Fiber-Infused Formula:** Bridges gaps with durable flexibility for long-lasting protection.
- • **Professional Matte Black Finish:** Sleek, non-reflective coating that blends with any flat roof.

## Overview

Bostik Flexacryl Instant Repair is a high-performance, fiber-reinforced waterproofing compound designed for flat roofs. It cures fully in just one hour, providing immediate protection on both dry and damp surfaces. Compatible with a wide range of roofing materials, this flexible, matte black coating ensures durable, gap-bridging coverage in a single, easy application.

## Description

From the manufacturer Bostik Flexacryl Instant Repair for Flat Roofs Waterproofing compound for flat roofs Bostik Flexacryl Instant Repair for Flat Roofs is a flexible roof coating that offers immediate waterproofing on most conventional roof substrates. Suitable uses and materials Bostik Flexacryl Instant Repair for Flat Roofs can be brushed straight from the tin onto substrates such as old roofing felt, asphalt, bituminous roof coatings, cement, concrete, lead work, metal, brickwork, slate and rigid PVC. Coverage 1 – 2kg (approx.) per m2 Advantages at a glance Immediate waterproofer for flat roofs Apply to dry or damp surfaces Contains fibres to bridge gaps Can be brushed straight from the tin Suitable for felt, asphalt, bituminous roof coatings, cement, concrete, slate and more Colour: Black 5kg tin

Review: Good waterproofing for flat roofs - Brilliant stuff just very sticky and just throw brush away when finished
Review: Supplied by desertcart - It seems a good product. It also covers well.

## 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 | 221,715 in DIY & Tools ( See Top 100 in DIY & Tools ) 232 in Waterproofers |
| Brand | Bostik |
| Brand Name | Bostik |
| Colour | Black |
| Colour Code | #000000 |
| Container Type | Pail |
| Coverage | one-coat waterproofing |
| Customer Reviews | 4.6 out of 5 stars 14 Reviews |
| Dry Time In Hours | 1 |
| Finish Type | Matte |
| 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 |
| 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 |
| Special feature | Long Lasting, Flexible |
| Specific Uses For Product | Flat Roofs and Gutters |
| Surface Recommendation | Roof |
| Unit Count | 1000.0 gram |
| 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 for Flat Roofs – Black - Image 1](https://m.media-amazon.com/images/I/61kGhiFC6AL.jpg)
![Bostik Flexacryl Instant Repair for Flat Roofs – Black - Image 2](https://m.media-amazon.com/images/I/81x3EeKWZvL.jpg)
![Bostik Flexacryl Instant Repair for Flat Roofs – Black - Image 3](https://m.media-amazon.com/images/I/71s7IrvWU1L.jpg)
![Bostik Flexacryl Instant Repair for Flat Roofs – Black - Image 4](https://m.media-amazon.com/images/I/71XO0qRhBVL.jpg)
![Bostik Flexacryl Instant Repair for Flat Roofs – Black - Image 5](https://m.media-amazon.com/images/I/916tv9ikg8L.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

### ⭐⭐⭐⭐ Supplied by Amazon
*by P***N on 17 July 2026*

It seems a good product. It also covers well.

### ⭐⭐⭐⭐⭐ 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.

## 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.sg/products/51946952-bostik-flexacryl-instant-repair-for-flat-roofs-black](https://www.desertcart.sg/products/51946952-bostik-flexacryl-instant-repair-for-flat-roofs-black)

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*Product available on Desertcart Singapore*
*Store origin: SG*
*Last updated: 2026-08-14*