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Renderoc LA55 is a single component, free-flowing low alkali micro-concrete.

The highly fluid nature of Renderoc LA55 obviates the need for compaction and vibration even where access to the repair zone is restricted or where reinforcement is congested.

Renderoc LA55 is designed for the reinstatement of large, structural sections of concrete and for smaller locations where difficulties of access make hand or trowel applied mortars impractical.

Renderoc LA55 is suitable for use where excellent chloride and carbon dioxide resistance is required or for repairs to concrete affected by alkali-silica reaction. Renderoc LA55 is alkaline in nature and will protect embedded steel reinforcement. The resistivity of Renderoc LA55 makes it suitable for electro-chemical repairs.

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Renderoc LA55


Single component, free-flowing low alkali micro-concrete

Standard product features

  • Low alkali content minimises risk of alkali-silica reaction.
  • High level of control of plastic and long term drying shrinkage.
  • Exceptional bond to the concrete substrate without independent primer.
  • Suitable for placement by pumping or pouring techniques into restricted locations.
  • Self-compacting nature eliminates honeycombing and displaces air without vibration.
  • Contains no chloride admixtures.
  • Excellent protection against carbon dioxide and chlorides.
  • Suitable for electro-chemical repairs.


Renderoc LA55 conforms to the requirements of the UK Department of Transport Standard (BD27/86, Clause 4) ‘Materials for the Repair of Concrete Highway Structures’ and has been formulated to comply with the requirements of the DTp Specification for Highway Works, Clause 1704.6 Control of Alkali-Silica Reaction.

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