Greengates Builders Merchants

Get Your Opti-Mix Plasticiser From Greengates Builders Merchants Accrington, Lancashire.

OPTI-MIX MORTAR PLASTICISER is a highly concentrated air entraining liquid plasticising admixture which is 25 times the strength of conventional products


OPTI-MIX forms extremely stable air bubbles in mortar mixes. This improves the workability of mortar, giving it a “buttery” consistency and helps prevent shrinkage, cracking, crazing and mild frost damage during the curing process, as well as providing long term resistance to freeze/thaw cycles. OPTI-MIX replaces lime in the mix and hence reduces the chance of efflo­res­cence (salt formation) and smoothes out variations between separate batches of sand and cement. Conforms to BSEN 934-3 (2009).



  • Concentrated formula. 1 litre is equivalent to 25ltr of standard mortar plasticiser.
  • Easy to use gauged bottle.
  • Superior Plasticising action
  • Improves workability of mortars. 


Areas For Use

  • Pointing mortars
  • Renders
  • Screeds
  • Bricklaying mortars



  • Do not use in structural concrete.
  • Do not exceed the recommended dosage rate range.
  • Do not mix with other additives in same gauging water.
  • Do not use in lime based mixes

It is the users respon­sibility to determine suitability for use. If in doubt contact Technical Services Department for further advice.­ 



Shake bottle well before use. Push the lid downwards and twist anti-clockwise to remove. Squeeze the sides of the bottle to fill the measuring cup to the required dose (5-10ml per 50kg of cement).

Add Optimix to a bucket of water and stir/mix well (use up to a maximum 10ltrs of water). Dry mix all other ingredients and add sufficient quantities of water/­Optimix solution until the desired consistency is achieved. Never add Optimix directly to the dry mix, always let down into a portion of gauging water. Replace cap after use.


So give us a ring today and get your Opti-Mix


Greengates Builders Merchants delivering to the whole of Lancashire including: Accrington, Blackburn, Burnley, Clitheroe, Darwen, Great Harwood, Haslingden, Padiham and Pendle.


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