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Additives & Admixtures

Admixtures and additives can be added as an extra ingredient when making concrete or cement to enhance the durability and workability of the product. Brands like Sika, Feb, Everbuild are available online or in branch.

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  • Everbuild 201 Mortar Admix Everbuild 201 Mortar Admix

    Everbuild 201 Mortar Admix

    £4.79 - £23.39 each (Ex VAT)
    £5.75 - £28.07 each (Inc VAT)
    201 Mortar Admix is an air entraining plasticiser. It replaces lime in the mix to provide an easy-to-work butter-like consistency to the mortar and to prevent shrinkage, cracking, and crazing while setting. 201 Mortar Admix is intended for use in...
  • Everbuild Opti-Mix Mortar Plasticiser 1 Litre Everbuild Opti-Mix Mortar Plasticiser 1 Litre

    Everbuild Opti-Mix Mortar Plasticiser 1 Litre

    The world's first 1:25 plasticiser, Opti-Mix Mortar Plasticiser is essentially Pure Admix that smells and operates like the best traditional Admix. Superior plasticising effect, controlled dosage, consistent mix design, ease of use, and no waste are just...
  • Everbuild 503 SBR Bond 5 Litre (SBR5L) Everbuild 503 SBR Bond 5 Litre (SBR5L)

    Everbuild 503 SBR Bond 5 Litre (SBR5L)

    SBR Bond is a latex based, water resistant bonding agent and admixture for use in areas subject to humidity, dampness and continuous water contact. It improves water resistance of cement mixtures by forming a reinforcing polymer that increases long-term...
  • Everbuild 506 Contract PVA Adhesive & Additive Primer 5kg (CONPVA5) Everbuild 506 Contract PVA Adhesive & Additive Primer 5kg (CONPVA5)

    Everbuild 506 Contract PVA Adhesive & Additive Primer 5kg (CONPVA5)

    Everbuild CONTRACTORS PVA in a 5 litre tub has been designed specifically for use in the building industry as a general purpose contracors bonding agent, and additive for concrete and plasters and as a multi-use primer adhesive. 506 Contractors PVA is a...
  • Everbuild Everbuild 203 Accelerator and Frostproofer 5 Litre

    Everbuild Everbuild 203 Accelerator and Frostproofer 5 Litre

    Accelerator & Frostproofer is a liquid additive formulated to accelerate setting and hardening times of mortar, concretes, screeds and rendering to provide frost protection during the setting period.
  • Soudal Soudafix P300-F Resin Dark Grey 280ml (154406)

    Soudal Soudafix P300-F Resin Dark Grey 280ml (154406)

    Soudafix P300-SF is a polyester resin based chemical anchor. Ideal for anchoring of threaded rods in masonry (18 brick types) and uncracked concrete (ETA approval option 7). Suitable for installation in hollow and solid masonry: aerated and lightweight...
  • Bostik Bituminous Black Paint Black 5 Litre (30812219)

    Bostik Bituminous Black Paint Black 5 Litre (30812219)

    This Bituminous Black Paint by Bostik is a 5 Litre tin of solvent-based protective coating for external waterproofing and weather protection of ferrous and non-ferrous metals, concrete, roofing felt, fibre cement, corrugated iron, asphalt and wood. It...
  • Bostik Cementone Cemplas Mortar Plasticiser Bostik Cementone Cemplas Mortar Plasticiser

    Bostik Cementone Cemplas Mortar Plasticiser

    £5.60 - £27.24 each (Ex VAT)
    £6.72 - £32.69 each (Inc VAT)
    Improves the workability and durability of mortar without the addition of lime. It helps reduce grittiness to provide a smooth mortar with improved durability and protection against frost. It also reduces the water content of the mortar. Containing a...
  • Bostik Cementone Chloride-Free Frostproofer & Plasticisier 5 Litre (30812487)

    Bostik Cementone Chloride-Free Frostproofer & Plasticisier 5 Litre (30812487)

    Manufactured by Bostik, this Plasticiser & Frostproofer accelerates the setting of mortar mixes year round but particularly in cold weather and during the Winter months. It also plasticises the mix to improve workability. It is ideal for bricklaying,...
  • Bostik Cementone Concentrated Resin Mortar Plasticiser 1 Litre (30806663)

    Bostik Cementone Concentrated Resin Mortar Plasticiser 1 Litre (30806663)

    Manufactured by Bostik, this Concentrated Mortar Plasticiser improves the workability and freeze thaw resistance of mortar without the addition of lime. It is suitable for use in mortars for bricklaying, pointing, blockwork and rendering. The integral...
  • Bostik Cementone Freeflo Waterproofer Plasticiser Retarder Bostik Cementone Freeflo Waterproofer Plasticiser Retarder

    Bostik Cementone Freeflo Waterproofer Plasticiser Retarder

    £12.00 - £49.74 each (Ex VAT)
    £14.40 - £59.69 each (Inc VAT)
    Waterproofs, retards and plasticises cement-based mixes. Available in either 25 Litres or a small 5 Litre tub. Bostik Freeflo Waterproofer & Retarder waterproofs is a liquid admixture which waterproofs, retards and plasticises cement-based mixes. It...
  • Bostik Cementone Integral Waterproofing Liquid Bostik Cementone Integral Waterproofing Liquid

    Bostik Cementone Integral Waterproofing Liquid

    £10.82 - £53.92 each (Ex VAT)
    £12.98 - £64.70 each (Inc VAT)
    Liquid additive that provides long-term water protection to mortar, non-structural concrete and rendering. Bostik Integral Waterproofer is a liquid additive that provides long-term water protection to mortar, non-structural concrete and rendering. It...
  • Bostik Cementone No1 Powder Cement Black 1kg (30812475)

    Bostik Cementone No1 Powder Cement Black 1kg (30812475)

    Bostik Colours for Cement have been specifically formulated to colour cement, renders (e.g. walls, swimming pools), mortars and flooring (sand/cement screeds, granolithic floor). Bostik Colours for Cement use pigments that conform to EN 12878 and are...
  • Bostik Cementone No1 Powder Cement Colour Brick Red 1kg (30812477)

    Bostik Cementone No1 Powder Cement Colour Brick Red 1kg (30812477)

    Bostik Colours for Cement have been specifically formulated to colour cement, renders (e.g. walls, swimming pools), mortars and flooring (sand/cement screeds, granolithic floor). Bostik Colours for Cement use pigments that conform to EN 12878 and are...
  • Bostik Cementone Renderbond PVA Adhesive & Sealer Bostik Cementone Renderbond PVA Adhesive & Sealer

    Bostik Cementone Renderbond PVA Adhesive & Sealer

    £9.27 - £15.32 each (Ex VAT)
    £11.12 - £18.38 each (Inc VAT)
    Bostik PVA (formerly known as Cementone Rendabond PVA) is ready to use and is suitable for a wide range of building jobs. It is a highly effective primer, admixture, bonding agent, dust proofer and may also be used as an adhesive. It is economical and...
  • Bostik Cementone SBR Strengthern & Waterproofing Mortar Admixture Bostik Cementone SBR Strengthern & Waterproofing Mortar Admixture

    Bostik Cementone SBR Strengthern & Waterproofing Mortar Admixture

    £22.93 - £111.09 each (Ex VAT)
    £27.52 - £133.31 each (Inc VAT)
    Toughens, waterproofs and improves chemical and abrasion resistance of renders, screeds and mortar. Bostik SBR is a specially modified Styrene Butadiene Co-polymer Latex for cement and mortar. It toughens, waterproofs and improves chemical and abrasion...
  • Bostik Flexacryl Instant Waterproof Acrylic Compound Roof Coat Grey 5kg (30811941)

    Bostik Flexacryl Instant Waterproof Acrylic Compound Roof Coat Grey 5kg (30811941)

    Flexacryl is an Instant Repair for flat roofs by Bostik. It is a flexible, single coat waterproofing compound that offers immediate waterproofing over most conventional roofing substrates. It can be brushed straight from the tin onto substrates such as...
  • ClassicBond WBA Roof Deck Adhesive

    £53.00 - £148.21 each (Ex VAT)
    £63.60 - £177.85 each (Inc VAT)
    ClassicBond's high strength, low odour water based acrylic adhesive is specifically designed for use with EPDM roofing membrane to timber deck surfaces. The adhesive develops excellent strength over time, making it suitable for use on flat roofs...
  • Everbuild 204 Evermix 3-in-1 5 Litre

    Everbuild 204 Evermix 3-in-1 5 Litre

    Evermix 3 in 1 triple action admixture waterproofs, plasticises and retards to assist workability, reduce water penetration and allow larger areas to be covered in one application.
  • Everbuild 208 Black Powder Mortar Tone 1kg Everbuild 208 Black Powder Mortar Tone 1kg

    Everbuild 208 Black Powder Mortar Tone 1kg

    208 Powder Mortar Tone is a high-quality oxide pigment that can be used to colour all types of mortars, renderings, concrete, and pointing. The pigments distribute into the mix to provide each batch a consistent shade; the dose can be changed to create a...
  • Everbuild Sikabond SBR+ 5 Litre

    Everbuild Sikabond SBR+ 5 Litre

    SikaBond SBR+ is a one component, water-based, general purpose styrene butadiene rubber emulsion bonding agent and mortar admixture for improving adhesion, workability and waterproofing of mortars.
  • Evo-Stik Impact Contact Spray Adhesive Amber 500ml (30812367) Evo-Stik Impact Contact Spray Adhesive Amber 500ml (30812367)

    Evo-Stik Impact Contact Spray Adhesive Amber 500ml (30812367)

    The Evo-Stik contact spray adhesive is a high strength, multipurpose adhesive that bonds instantly on contact. With no need for clamping or support, this fast drying, easy spray application adhesive has the power to bond most types of materials, and...
  • Soudal High Viscosity Superglue 50g (115107)

    Soudal High Viscosity Superglue 50g (115107)

    Super fast curing, Cyanoacrylate based Superglue adhesive. Fast bonding of non porous surfaces, such as rubber, metals, plastics, glass etc. Adhesion can be accelerated using Soudal Superglue Activator.
  • Soudal Soudabond 265 Classic Contact Adhesive Spray 500ml (146309)

    Soudal Soudabond 265 Classic Contact Adhesive Spray 500ml (146309)

    Soudabond 265 Classic Spray by Soudal is a universal, ready-to-use contact adhesive. The spray applied adhesive is easy-to-use and provides a strong bond between most lightweight materials; especially effective on textiles, flexible floor coverings and...

Additives & Admixtures

There are major differences between additives and admixtures when it comes to cement and concrete admixtures. Additives can be any substance added to something in small quantities which ultimately improves or preserves it, whereas admixture are components added to a concrete mixture while mixing. For example, to make concrete, there are three core ingredients: aggregates, cement, and water.

Examples of some chemical admixtures are: air-entraining, water-reducing, retarding, accelerating and plasticizers - which all ultimately reduce the cost of building with concrete, and are used to ensure that certain properties maintain a cured concrete quality.

For further expert advice and guidance on admixtures and additives, please contact your friendly local Howarth branch.