Home improvement solution for urgent concrete repairs, setting in around 20 minutes for rapid patches. Bostik Rapid Setting Cement keeps drains, paths and steps usable much sooner, relieving the stress of emergency leaks. Is the fast cure time right for your repair needs?
⚡ At a Glance
- • Setting Time: Sets in about 20 minutes, enabling quick turnaround on small repairs
- • Best for: Fast patching, emergency repairs and small-scale concrete fixes indoors and outdoors
- • Not ideal for: Large pours or jobs that require long working time and extensive finishing
Ready-mixed powder requires only water to activate and bonds to concrete surfaces. The mix cures quickly to a waterproof, durable finish suitable for drains, steps and utility areas.
Emergency Repairs Done Quickly – Thanks to 20-minute setting time
Pre-blended cement powder hydrates rapidly when mixed at the recommended ratio of 0.25L water per 1kg, producing a trowelable paste that hardens within around 20 minutes. Fast hydration minimises working and cure time without additional additives.
Complete small repairs and return surfaces to use the same day, reducing downtime for paths, steps and service apertures.
Waterproof Repairs for Indoor and Outdoor Use – With a waterproof ready-mix formula
Formulation creates a cured matrix that resists water penetration, suitable for areas exposed to moisture. Compatibility with concrete substrates allows effective repairs on drains and outdoor surfaces.
Apply confident, long-lasting seals on wet-prone areas like drains and steps, so repairs remain effective in damp conditions.
Simple Mixing and Application – With a clear water-to-powder ratio
Mix at 0.25L of water per 1kg of powder to reach a smooth, workable consistency for trowel application. Ready-mixed proportions remove guesswork and promote consistent curing and strength.
Quick to prepare and easy to apply with a trowel, making it well suited to DIYers and tradespeople handling small repairs.
✨ The 4 Key Reasons for Bostik Rapid Setting Cement
- Ready-mixed formula – Speeds preparation, perfect for swift DIY and emergency fixes
- Strong bond – Creates a high-strength repair that holds under foot traffic
- Waterproof finish – Prevents water ingress on drains, steps and outdoor edges
- Accurate mixing ratio – 0.25L water per 1kg ensures predictable curing and finish
📋 Technical Details at a Glance
- Category: Rapid-setting cement
- Brand: Bostik
- Weight: 2.5kg
- Colour: Grey
- Setting time: Sets in about 20 minutes
❓ Frequently Asked Questions
Q: How quickly does the cement set once mixed?
A: Sets in around 20 minutes after mixing, making it suitable for rapid repairs and quick reinstatement of surfaces.
Q: Can the cement be used outdoors and in wet areas?
A: Yes, the formulation is waterproof and durable, suitable for interior and exterior use including drains, paths and steps.
Q: What is the correct water ratio for mixing?
A: Mix using 0.25L of water per 1kg of powder, stir to a smooth consistency and apply with a trowel.
🏆 Our Verdict
Ideal for homeowners and tradespeople who need rapid, small-scale concrete repairs. Fast 20-minute setting, waterproof performance and a strong bond make it especially handy for emergency fixes and wet areas. While cost varies by supplier, the quick cure time and durable results make it a practical long-term choice for occasional repair work.
