---
product_id: 66918041
title: "Rapid Setting Cement 5kg - Fast-Setting 20 Minute Waterproof Repair Mortar - Ready Mixed, Just Add Water - Strong & Durable - For Drain Repairs & Concrete Fixing - Indoor & Outdoor Use"
brand: "bostik"
price: "758 Lei"
currency: RON
in_stock: true
reviews_count: 9
category: "Bostik"
url: https://www.desertcart.ro/products/66918041-rapid-setting-cement-5kg-fast-setting-20-minute-waterproof-repair
store_origin: RO
region: Romania
---

# Sets in 20 minutes Waterproof & durable High-strength bond Rapid Setting Cement 5kg - Fast-Setting 20 Minute Waterproof Repair Mortar - Ready Mixed, Just Add Water - Strong & Durable - For Drain Repairs & Concrete Fixing - Indoor & Outdoor Use

**Brand:** bostik
**Price:** 758 Lei
**Availability:** ✅ In Stock

## Summary

> ⏳ Fix it fast, fix it strong — don’t let cracks cramp your style!

## Quick Answers

- **What is this?** Rapid Setting Cement 5kg - Fast-Setting 20 Minute Waterproof Repair Mortar - Ready Mixed, Just Add Water - Strong & Durable - For Drain Repairs & Concrete Fixing - Indoor & Outdoor Use by bostik
- **How much does it cost?** 758 Lei with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ro](https://www.desertcart.ro/products/66918041-rapid-setting-cement-5kg-fast-setting-20-minute-waterproof-repair)

## 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

- • **Rock-Solid Strength:** Engineered to withstand cracks, leaks, and heavy use.
- • **Waterproof & Weatherproof:** Reliable performance indoors and out, rain or shine.
- • **Versatile Repair Powerhouse:** Perfect for drains, concrete fixes, and emergency patch-ups.
- • **Lightning-Fast 20-Minute Set:** Get your repairs done before your coffee cools down.
- • **Effortless Mixing & Application:** Just add water, mix, and apply—no fuss, no mess.

## Overview

Bostik Rapid Setting Cement is a premium 5kg fast-setting mortar that cures in just 20 minutes, delivering a waterproof, durable, and high-strength repair solution. Ideal for both indoor and outdoor use, it’s perfect for emergency fixes on drains, concrete, and structural cracks. Simply add water to the ready-mixed powder for a smooth, hassle-free application that professionals and DIYers trust to get the job done quickly and reliably.

## Description

Shop Bostik Rapid Setting Cement 5kg - Fast-Setting 20 Minute Waterproof Repair Mortar - Ready Mixed, Just Add Water - Strong & Durable - For Drain Repairs & Concrete Fixing - Indoor & Outdoor Use. Free delivery on eligible orders of £20 or more.

Review: Very good to use on cracks and for bedding in products. - This is a very good product provided that you follow the mixing instructions which are on the container TO THE LETTER. I used it to install a protective cover over an existing water meter manhole. This was done on a damp day at a temperature of 12 degrees Celsius. The mixture has a very creamy consistency but you only have about 20 minutes before it starts to set. Very good for filling in cracks on flat surfaces, but a bit too runny to lay bricks.
Review: Good but costly but still worth paying for use in the job at hand - The patio at the side of the house was laid badly where the motar was not of recommended mix during the winter months. Unknown to us it was virtuyally all sand with only a skim of cement mixture at very top. Therefore needed scoop it all out and re-point with proper mixture of cement & motar. Instead of using standard pack of 25kg cement at <£5, decided to use this as it is pre-mixed (but not ready-mixed; the user has to add water). By chance I ordered 3. This allowed most of the first bucket to be put into buckets 2 and 3 and leave 1kg or 2 kg in the first bucket with which to mix in some water. For the task above I could only manage to dig out on average 5 feet of old material between the slabs then re-point using this Bostik cement. This Bostik is expensive as compared to standard bag of cement but it is quick setting; strong enough for me to step on the slabs the next day to continue the task of repointing the other slabs. I have also a bucket of Blue Circle Extra Quck Setting cement, which is even more expensive, but which proved to be too quick setting for me to use - a professional brick layer may be proficiently fast to use that Blue Circle Extra Quick cement. I must also say it is mostly cement rather than a motar mixture. Also, depended how (quick or much) you use it, I could only use 1-2 kg at a time, some parts have dried white in colour, some sandy white, some light grey. At the moment noticed it tended to be sandy white from material at the bottom of the bucket - assuming heavier sand sunk to the bottom than the cement p;owder which stayed at the top of the bucket. After comparing with rest of the available versions of cement and different brands, conclusion is it may be expensive but fair as compared to standard and Extra Quick cement. It is also convenient to use; it is quick enough for me to continue work next day but slow enough for my lack of builders' skills (I am better at carpentry). More importantly, during this continued pandemic times, this remains available some of the time whereas standard bags of cement is like gold dust for their non-availability.

## Features

- Causes serious eye damage.
- Causes skin irritation.
- May cause an allergic skin reaction.
- May cause respiratory irritation.
- ⏳ Sets in Just 20 Minutes – Perfect for emergency repairs, patching, and quick installation projects.
- 💧 Waterproof & Durable – Suitable for interior and exterior use, including drains, paths, steps, and concrete surfaces.
- 🏗️ Strong & Reliable Bond – Creates a high-strength repair solution for cracks, leaks, and structural fixes.
- 🔨 Multi-Purpose Use – Ideal for sanitary installations, fixing drainage systems, and filling service apertures around pipes.
- ✅ Easy to Use & Mix – Simply add water (0.25L per 1kg of cement), mix, and apply with a trowel for a smooth, hassle-free finish.
- Contents: 1x Bostik Cementone Rapid Setting Cement, Colour: Grey, 5kg

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01N4M939C |
| Batteries Required? | No |
| Batteries included? | No |
| Best Sellers Rank | 452 in DIY & Tools ( See Top 100 in DIY & Tools ) 1 in Cement |
| Colour | Grey |
| Customer Reviews | 4.5 4.5 out of 5 stars (7,313) |
| Date First Available | 9 Jan. 2017 |
| Item model number | 30812808 |
| Material Type(s) | Cement |
| Number of pieces | 1 |
| Product Dimensions | 1 x 1 x 1 cm; 5.5 kg |

## Product Details

- **Brand:** Bostik
- **Item form:** cement
- **Material:** Cement
- **Special feature:** Waterproof
- **Specific uses for product:** Construction, Sanitary Fittings, Drainage Systems, Concrete Repair, Emergency Repairs

## Images

![Rapid Setting Cement 5kg - Fast-Setting 20 Minute Waterproof Repair Mortar - Ready Mixed, Just Add Water - Strong & Durable - For Drain Repairs & Concrete Fixing - Indoor & Outdoor Use - Image 1](https://m.media-amazon.com/images/I/612m5X9t1eL.jpg)

## Questions & Answers

**Q: Can you use this for cracks in back yard floor**
A: It would make an ideal filler for concrete cracks, yes, but be careful - you will need to work quickly - in sets in 10 minutes.

**Q: What colour Grey is this. Dark or Light?**
A: more on the dark grey side, more or less the same as brick joint cement

**Q: What colour is this?**
A: its the colour of cement but if you want you could add dye to it

**Q: what volume would a kg of this be in litres? thanks**
A: As a rough guide it arrives in a 2.5kg tub, it's not full as it settles during transit.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Very good to use on cracks and for bedding in products.
*by A***L on 12 December 2025*

This is a very good product provided that you follow the mixing instructions which are on the container TO THE LETTER. I used it to install a protective cover over an existing water meter manhole. This was done on a damp day at a temperature of 12 degrees Celsius. The mixture has a very creamy consistency but you only have about 20 minutes before it starts to set. Very good for filling in cracks on flat surfaces, but a bit too runny to lay bricks.

### ⭐⭐⭐⭐ Good but costly but still worth paying for use in the job at hand
*by E***R on 25 October 2021*

The patio at the side of the house was laid badly where the motar was not of recommended mix during the winter months. Unknown to us it was virtuyally all sand with only a skim of cement mixture at very top. Therefore needed scoop it all out and re-point with proper mixture of cement & motar. Instead of using standard pack of 25kg cement at <£5, decided to use this as it is pre-mixed (but not ready-mixed; the user has to add water). By chance I ordered 3. This allowed most of the first bucket to be put into buckets 2 and 3 and leave 1kg or 2 kg in the first bucket with which to mix in some water. For the task above I could only manage to dig out on average 5 feet of old material between the slabs then re-point using this Bostik cement. This Bostik is expensive as compared to standard bag of cement but it is quick setting; strong enough for me to step on the slabs the next day to continue the task of repointing the other slabs. I have also a bucket of Blue Circle Extra Quck Setting cement, which is even more expensive, but which proved to be too quick setting for me to use - a professional brick layer may be proficiently fast to use that Blue Circle Extra Quick cement. I must also say it is mostly cement rather than a motar mixture. Also, depended how (quick or much) you use it, I could only use 1-2 kg at a time, some parts have dried white in colour, some sandy white, some light grey. At the moment noticed it tended to be sandy white from material at the bottom of the bucket - assuming heavier sand sunk to the bottom than the cement p;owder which stayed at the top of the bucket. After comparing with rest of the available versions of cement and different brands, conclusion is it may be expensive but fair as compared to standard and Extra Quick cement. It is also convenient to use; it is quick enough for me to continue work next day but slow enough for my lack of builders' skills (I am better at carpentry). More importantly, during this continued pandemic times, this remains available some of the time whereas standard bags of cement is like gold dust for their non-availability.

### ⭐⭐⭐⭐⭐ waterproof and quick drying
*by M***L on 12 October 2023*

I bought this as we had 2 small holes around the edges of the deep kitchen drain which was discovered by the professional who came to unblock it. He said we needed to get it repaired to prevent the waste water damaging our foundations. I mixed up a small quantity of the mixture in an old plastic pot and stirred it with an old gardening knife. It mixed up like icing sugar. I got it to a stiff consistency and filled up the gaps. To ensure it dried I used a hairdryer on it for a while, and did not use the drain for a couple of hours. The product is very easy to use, and as I wore plastic gloves made no mess. I never bother to check sizes and assumed when I ordered the product it would come in a small pot. The container is huge, and I could hardly lift it. I will embark on further filling on the garden path , weather permitting, and will offer some to my neighbour as she may wish to use some. This is a truly excellent product, easy to use, and very good value.

## Frequently Bought Together

- Bostik Rapid Setting Cement – 5kg – Fast-Setting 20min, Waterproof & Strong – Ideal for Patching, Drain Repairs & Concrete Fixing – Interior & Exterior Use
- Faithfull FAISGTPT6 Soft-Grip Pointing Trowel 150mm (6in)
- Faithfull FAISGTGAUG7 Soft-Grip Gauging Trowel 175mm (7in)

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*Product available on Desertcart Romania*
*Store origin: RO*
*Last updated: 2026-01-23*