YES, I repaired holes and cracks in exterior steps a few months ago and I have not had a problem.

Can I use this for laying edging stones

You can but it dries white and does not look great.

Is this 5 kg or 10kg - tub shows 5kg - description says 10kg?

10kg. Hard to mix 2.5lts of water into this tub even though v large, I'd suggest a mixer or doing jobs in increments with a separate container.

Is this good for over soil and under artificial grass? Will it last?

I think it would crack for that purpose. I would try sand if you need to level the ground under artificial grass.

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Bostik Rapid Setting Cement 10kg - Fast-Setting 20 Minute Waterproof Repair Mortar - Ready Mixed, Just Add Water - Strong & Durable - For Drain Repairs & Concrete Fixing - Indoor & Outdoor Use

Bostik Rapid Setting Cement 10kg - Fast-Setting 20 Minute Waterproof Repair Mortar - Ready Mixed, Just Add Water - Strong & Durable - For Drain Repairs & Concrete Fixing - Indoor & Outdoor Use

Product ID: 49998705

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Details

Brand
Bostik
Item dimensions L x W x H
26.7 x 26.7 x
Colour
Grey
Shape
Rectangular
Item thickness
Not applicable

⏳Sets in 20 minutes

💧Waterproof for all conditions

🏗️High-strength durable bond

Description

⏳ Fix it fast, fix it strong—because time and durability wait for no one!

VERSATILE APPLICATION - Perfect for drains, pipes, steps, and emergency patching—one mix, endless solutions.
LIGHTNING FAST REPAIRS - Ready to use in just 20 minutes—never let downtime slow you down.
ALL WEATHER WATERPROOFING - Seals and protects surfaces indoors and out, rain or shine.
UNMATCHED STRUCTURAL STRENGTH - Delivers a rock-solid fix for cracks, leaks, and heavy-duty patches.
EFFORTLESS MIXING APPLICATION - Just add water, stir, and apply for a smooth, professional finish every time.

Bostik Rapid Setting Cement is a 10kg commercial-grade powder that sets in just 20 minutes, offering a waterproof and high-strength solution for interior and exterior repairs. Ideal for patching cracks, fixing drains, and concrete surfaces, it mixes easily with water for quick, reliable application in emergency and routine maintenance projects.

Specifications

Item form	Powder
Grade rating	Commercial
Number of items	1
Global Trade Identification Number	05010591540163
Product Dimensions	26.7 x 26.7 x 26 cm; 10.62 kg
Item model number	30812809
Number of pieces	1
Batteries Required?	No
Batteries included?	No
Release date	17 Mar. 2016
ASIN	B01D8FRG9Q

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