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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