Watch the Entire Process Before You Buy
See exactly what's involved — from building your mould to revealing your finished worktop. No surprises.
- How to build a mould (including the 40mm lip)
- Mixing and pouring the concrete
- Demoulding after 18 hours
- Etch, wet-sand, and neutralise the surface
- Apply first seal, then fill pinholes
- Final seal for a professional finish
Get a Premium 40mm Edge — Without Doubling the Cost
Most people want a thick, substantial-looking worktop edge. But casting the entire surface at 40mm means double the material, double the weight, and double the cost.
Our recommended technique uses a 20mm core with a shuttered 40mm lip along the front edge only. Because precast concrete is cast upside down, the lip forms at the bottom of your mould and becomes the visible edge once flipped.
💡 The result: a worktop that looks 40mm thick from the front but weighs half as much and uses half the material.
Choose Your Kit
Three Sizes. One Complete System.
Every kit includes the concrete mix, sealer, mould release, reinforcement bars for sink or hob openings, and a full processing kit. Just pick the size that fits your project.
Small
Up to 1 sqm
Bathroom vanity, side table, coffee table, small island
What's included
- GFRC Worktop Mix 2 bags
- Mould Release Agent 1 bottle
- Concrete Lab Sealer 1 tin
- Reinforcement Bars 4 bars
- Processing Kit 1 kit
Medium
Up to 2 sqm
Standard kitchen worktop, desk, dining table, bar top
What's included
- GFRC Worktop Mix 4 bags
- Mould Release Agent 1 bottle
- Concrete Lab Sealer 1 tin
- Reinforcement Bars 4 bars
- Processing Kit 1 kit
Large
Up to 3 sqm
Large kitchen, L-shaped worktop, outdoor kitchen, island
What's included
- GFRC Worktop Mix 6 bags
- Mould Release Agent 1 bottle
- Concrete Lab Sealer 1 tin
- Reinforcement Bars 4 bars
- Processing Kit 1 kit
Build Your Own
Any size project
Need a custom quantity? Use our project calculator to get exactly what you need — no more, no less.
- Enter your exact worktop dimensions
- Get a precise materials list
- Choose your colour and sealer finish
- Add everything to cart in one click
Not Sure Which Size?
Bathroom Vanity
Typically 0.4 – 0.8 sqm
Small KitStandard Kitchen
Typically 1.5 – 2.0 sqm
Medium KitLarge Kitchen / L-Shape
Typically 2.0 – 3.0 sqm
Large KitHow It Works
5 Steps to a Concrete Worktop
Most people complete their worktop over a single weekend.
Build Your Mould
Use melamine board to create your mould shape. Apply the included mould release.
Mix & Pour
Just add water and additives. Self-compacting mix flows into every corner. No vibration needed.
Cure & Demould
Wait 18 hours to demould. Twice strength of normal concrete in 7 days.
Process & First Seal
Etch, wet-sand, and neutralise the surface. Apply a first coat of sealer to protect the raw concrete.
Smooth & Final Seal
Fill pinholes with smoothing paste onto the sealed surface, then apply final sealer coats.
5 Colours
Choose Your Concrete
Every kit is available in all five colours. Same formula, same strength, same finish.
FAQs
Common Questions
Ready to Make Your Own Concrete Worktop?
Pick your size, choose your colour, and we'll send you everything you need — plus step-by-step video tutorials to guide you from mould to finished surface.