Cast Your Own Concrete Benchtop in a Weekend

Q: Can I buy the ingredients separately instead of the kit?

Yes. Premix, sealer, plasticiser, fibre, mould release and tools are all sold individually (see the supplies list). Bought separately it starts from around $840, so the kit saves you money and the measuring.

No guesswork, no wasted premix. Complete kits from $765.05 inc GST.

Not Your Average Bag of Concrete

A smooth, crack-resistant concrete benchtop, without guessing at ratios.

A GFRC benchtop mix is silica-free premix, AR glass fibre reinforcing, a plasticiser for workability and a sealer for stain resistance, each doing a job standard concrete can’t.

Why Tradies and DIYers Both Reach for This Kit

Pre-Measured

No guessing ratios or ordering the wrong amount. Premix, plasticiser, fibre and sealer arrive measured for the job, so you can get straight to mixing.

Silica-Free

MACt GFRC Premix is silica-free, which removes the silica dust hazard when mixing, cutting and polishing. Safer to work with, indoors or out. As with any cement product, still wear gloves, eye protection and a dust mask.

Covers Up to 4 sqm

The Starter Kit covers up to 4 sqm at 25mm thickness, enough for a typical kitchen benchtop. Going bigger? The Ultimate Kit covers up to 8 sqm.

Grey or White

Grey gives the classic raw-concrete look. White gives a brighter, cleaner finish and is the better base if you plan to add colour pigment. Both kits come in either.

Ships Australia-Wide

Direct from MACt, tracked door to door.

Two Kits, One Goal

A smooth, crack-resistant concrete benchtop without guessing at ratios.

MACt Benchtop Starter Kit

$765.05 Inc GST

Covers up to 4 sqm. Includes silica-free GFRC premix, sealer, plasticiser and reinforcing fibres. Grey or white.

MACt Ultimate Benchtop Starter Kit

$1,530.10 Inc GST

Covers up to 8 sqm, for larger benchtops, islands and waterfall-edge builds. Silica-free GFRC premix, AR fibres, plasticiser and high-performance sealer. Grey or white.

The Process, Start to Finish

1

Prep the Mould

Build or buy a mould to size, apply release agent.

2

Mix the Premix

Combine premix, water and plasticiser to a workable consistency.

3

Pour & Reinforce

Pour in lifts, laying AR glass fibre reinforcing between layers.

4

Cure

Let it cure under plastic for the full recommended time.

5

Demould & Finish

Strip the mould, sand and polish edges to the finish you want.

6

Seal

Apply MACt Seal for a durable, stain-resistant surface.

Prefer not to source everything separately? The Starter Kit has it pre-measured.

Common Questions

How much does a concrete benchtop kit cost?

From $765.05 inc GST for the Starter Kit, covering up to 4 sqm. The Ultimate Kit is $1,530.10 for larger builds up to 8 sqm.

How much area does one kit cover?

The Starter Kit covers up to 4 sqm at 25mm thickness — enough for a typical kitchen benchtop. The Ultimate Kit covers up to 8 sqm at 25mm, for islands, waterfall ends or multiple benchtops.

Do I need special tools to make a GFRC benchtop?

Nothing exotic. You’ll need a mould built to size, a drill with a mixing paddle, buckets, a trowel and a sander or polisher for finishing. We also stock tools and mixers if you need them.

Is GFRC premix silica-free and safe to work with?

Yes. MACt GFRC Premix is silica-free, which removes the silica dust hazard when mixing, cutting and polishing. As with any cement product, still wear gloves, eye protection and a dust mask.

Grey or white — which colour should I choose?

Grey gives the classic raw-concrete look. White gives a brighter, cleaner finish and is the better base if you plan to add colour pigment. Both kits are available in either.

Can I buy the ingredients separately instead of the kit?

Yes — premix, sealer, plasticiser, fibre, mould release and tools are all sold individually (see the supplies list above). Bought separately it starts from around $840, so the kit saves you money and the measuring.

Everything You Need

Rather build your own bill of materials? Every ingredient is sold individually.

Or skip the list: the Starter Kit has it all pre-measured for $765.05.

Whether You’re Doing This Once or Every Week

DIY enthusiasts: your first concrete pour, made foolproof with a pre-measured kit and clear instructions.

Renovators and homeowners: a custom benchtop that fits your space exactly, at a fraction of a stone quote.

Builders and tradespeople: consistent, repeatable results job to job. Buy the kit or stock the individual supplies.

Ready to Cast Your Own Concrete Benchtop?

Pick up a kit and get started, or learn the craft hands-on at a MACt GFRC training course.

"Cast your own concrete benchtop in a weekend — no guesswork, no wasted premix"

Buy separately from $840Kit from $765.05

4.6 Google Rating ★★★★★· 500+ benchtops poured Australia-wide

Who's This For

Whether you're doing this once or every week

DIY Enthusiasts

Your first concrete pour, made foolproof with a pre-measured kit and clear instructions.

Renovators & Homeowners

A custom benchtop that fits your space exactly, at a fraction of a stone quote.

Builders & Tradespeople

Consistent, repeatable results job to job — buy the kit or stock the individual supplies.

Choose Your Kit

Two kits, one goal

A smooth, crack-resistant concrete benchtop without guessing at ratios.

MACt Benchtop Starter Kit

$765.05 inc GST

Covers up to 4 sqm. Includes silica-free GFRC premix, sealer, plasticiser and reinforcing fibres. Grey or white.

MACt Ultimate Benchtop Starter Kit

$1,530.10 inc GST

Covers up to 8 sqm — for larger benchtops, islands and waterfall-edge builds. Silica-free GFRC premix, AR fibres, plasticiser and high-performance sealer. Grey or white.

The Mix

Not your average bag of concrete

A GFRC benchtop mix is silica-free premix, AR glass fibre reinforcing, a plasticiser for workability and a sealer for stain resistance — each doing a job standard concrete can’t. Buy the kit pre-measured, or build your own bill of materials below.

How to Make One

The process, start to finish

Prep the mould

Build or buy a mould to size, apply release agent.

Mix the premix