FOSROC Renderoc LA55

Renderoc LA55 is ideal for the reinstatement of large, structural sections of concrete as well as for many smaller locations where difficulties of access make hand or trowel-applied mortars impractical. 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. It is suitable for use where excellent chloride and carbon dioxide resistance is required or for repairs to concrete affected by alkali-silica reaction (ASR). Renderoc LA55 is alkaline in nature and will protect embedded steel reinforcement. The resistivity of Renderoc LA55 makes it suitable for electro-chemical repairs. Renderoc LA55 is suitable for use with Galvashield XP incipient anode protection and Cathodic Protection system. Contact Fosroc for further details.


  • Maximum compatibility with concrete compressive strength, 30 - 60MPa
  • Unique dual expansion system offers an extremely high level of control of plastic and long-term drying shrinkage
  • Low alkali content minimises risk of alkali-silica reaction
  • Excellent bond to concrete substrates without independent primer
  • Very low permeability provides excellent protection against carbon dioxide and chlorides
  • Exceptional flow allows pumping or pouring into restricted locations
  • Self-compacting nature eliminates honeycombing and displaces air without vibration
  • Suitable for electro-chemical repairs
  • Pre-bagged to overcome site-batched variations - only the site addition of clean water is required
  • Contains no chloride admixtures
  • Potable water approved - complies to AS/NZS 4020:2005


FOSROC Renderoc LA55 PDS

FOSROC Renderoc LA55 SDS

FOSROC Renderoc LA55 Spec Clause