Admixtures & Building Chemicals

From accelerating the setting time of concrete to improving frost-resistant properties of mortar, our professional building admixtures are suitable for an extensive variety of applications.

This range features several industry favourites such as the shrinkage-preventing 201 Mortar Admix, 203 Accelerator & Frostproofer and Opti-Mix Mortar Plasticiser.

If you know what’s needed for your next job, create a trade account or login to build your order.

Concrete and mortar additives for all applications

Our admixtures include the waterproof concrete additive 202 Integral Liquid Waterproofer, ideal for reducing permeability in applications such as pool and tank linings, roof areas, external rendering and pointing, and structures below ground level. Our Opti-Mix Integral Waterproofer acts as a mortar plasticiser, waterproofing agent and salt inhibitor, all in one waste-free bottle.

For jobs where coloured cement is required, 208 Powder Mortar Tone is available in a range of shades, while 209 Liquid Mortar Tone and Opti-Mix Cement Colourant also do the job for requirements of black mortar, which is often found in older properties.

204 Evermix 3 In 1 and Opti-Mix 3-In-1 Render Additive offer multipurpose solutions, while 207 Zeromix CFF is a double-action frostproofer and air-entraining mortar admix for use throughout the winter period, and 206 Strike Release Oil is perfect for removing concrete shuttering.

Febmix Admix – The Original replaces lime in the mix to provide an easy-to-work consistency to mortar and prevent shrinkage, cracking and crazing during setting. Febmix Plus is a liquid designed to enhance workability and freeze-thaw resistance of brick and block laying mortars.

SikaMix Plus improves the hydration process and produces high-quality plaster for brickworks, masonry and coatings, while Sika Rendermix improves renders and screeds and can be used as an ‘improver’ for pebble dashing or roughcast finishes. Sika Wintermix allows mortars and concretes to be used even at sub-zero temperatures.

Get leading admixtures from The Builders’ Brand

Our wide range of tried and trusted building products is formulated on a quarter-century of enthusiasm for helping the trade get jobs done.

Our technical experts are happy to help if you have any questions regarding concrete admixtures, while you can browse our blog for further tips and inspiration. This guide on winter admixtures is a must-read before working in colder conditions.

Displaying 12 of 29 results.