Concrete Lab

Cast-In-Place Mix

Shipping calculated at checkout.
Colour: Light Grey

Pickup available at Unit C3 Station Approach Industrial Estate

Usually ready in 2-4 days

Our Cast-In-Place Mix is a specially formulated premium high-strength concrete mix.

•⁠  ⁠Suitable for indoor and outdoor use 
•⁠  ⁠Suitable for cast-in-place or cast-in-situ concrete worktop, countertop, table, bar or sink projects.
•⁠  ⁠Designed to be cast at 30mm to 40mm thickness
•⁠  ⁠Cast the "right way up" with the base formwork being left in place forming part of the structure.

Not sure where to start? Fill in our super speedy, no obligation, online form using the button below to calculate the  materials needed for your project and unlock expert tutorials and tips here!




Mould Building Guide PDF
Mixing Instructions PDF YOUTUBE
Placing & Trowelling Instructions PDF YOUTUBE
Sanding & Sealing Instructions PDF YOUTUBE

Application Instructions


Application Instructions PDF
Application Instructions PDF
Application instructions PDF YOUTUBE
Product Contents

Each pack contains;

1 Bag of Cast-In-Place Base Mix
1 Bag of Glass Fibres
1 Bag of Dye (except for Off-White)

The kit comes in approx 22kg (gross) packs.

PLEASE NOTE - Our Cast In Place Mix should be used where the temperature of the concrete can be maintained at or above 15DegC. This can be achieved using heated blankets where the ambient conditions do not allow for this.

PLEASE NOTE - The finished product is not suitable for direct or close contact with extreme heat (i.e. over 200degC) and may be liable to crack.

Quantities & Coverage

0.36 square metres at 30mm thickness


Domestic Shipping Policy: 

All orders are processed within 1-3 business days. Orders are not shipped or delivered on weekends or holidays. Once processed, orders are shipped within 2 to 5 days.

Delays can occasionally occur and this should be factored when placing an order.

If we are experiencing a high volume of orders, shipments may be delayed by a few days. Please allow additional days in transit for delivery. If there will be a significant delay in shipment of your order, we will contact you via email or telephone.


Shipping charges for your order will be calculated and displayed at checkout. 
Concrete Lab ships to addresses within the UK. For addresses in Europe please email us at 

Delivery to Europe can take up to 1-2 week.

Delays can occasionally occur and this should be factored when placing an order.


You will receive a Shipment Confirmation email once your order has shipped containing your tracking number(s). The tracking number will be active within 24 hours.


Concrete Lab is not responsible for any customs and taxes applied to your order. All fees imposed during or after shipping are the responsibility of the customer (tariffs, taxes, etc.).


If you received your order damaged, please contact as soon as possible.

International Shipping Policy

We currently do not ship outside the UK and Europe unless by prior arrangement.


Our Return & Refund Policy provides detailed information about options and procedures for returning your order. This can be found at the bottom of the page.

Product Care
Caring For Your Concrete

We recommend that your finished concrete, whether it be microcement, cast-in-place or GFRC concrete, be sealed with our sealer according to our instructions. Please see the relevant Help Section for more information in relation to application.
We also recommend that once sealed your concrete is waxed regularly to both enhance the appearance of the concrete and to provide an extra layer of durability.

Things To Avoid

Concrete products have very good heat resistance. However, as with natural stone materials, they may be damaged by sudden and rapid temperature changes so we recommend not putting pots and pans straight onto the surface.


Using sharp objects directly on your concrete countertops products will damage the sealer, and doing so may dull your knife, so always use a chopping board on top of your countertop.


Our high performance sealer performs very well but reasonable care should be taken to minimise the risk of staining. For the first 28 days after installation the concrete may be more susceptible to staining until it has fully cured.  Any spillages must be cleaned up as quickly as possible. The applied sealers will slow the penetration of the spillage to allow time to clean it up. If spillages have been left too long and have stained, the areas may need to be cleaned with specialist cleaners/degreasers and sealer reapplied. Sealers may not protect against any acidic substances, if not cleaned up quickly acidic substances may etch the concrete. 

How To Care For Your Concrete

We recommend using only mild detergents and a soft cloth to clean your concrete product(s). Do not use harsh or abrasive chemicals or cleaning products that contain bleach, scouring pads or sponges as these will scratch the sealers and over time may remove them. The use of such items, products will void the warranty.
We recommend that a good quality furniture wax is used to maintain the condition and continually improve the protection of your concrete.
In particular we recommend Rhoose Point Beeswax because it is food safe and entirely natural so can be used in food prep areas. This can be purchased from Concrete Lab HERE.

Application of Wax

This should be applied in accordance with our instructions. Please refer to our Help Section for more guidance.

Domestic setting - In the first month the wax should be applied weekly. After this initial period the wax should be applied monthly to ensure protection.

Commercial setting - In the first month the wax should be applied twice weekly. After this initial period the wax should be applied every two weeks to ensure protection.

Reapplication of Sealer
The top layer of the sealer may eventually give way. In this event the top layer of the concrete can be lightly sanded back and the sealer re-applied.

Cast-In-Place Mix Video Guides

Check out the videos below to learn how to use our products.


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