Fosroc Renderoc La55 Plus 20kg

Renderoc LA55 Plus is a high-performance, free-flowing, shrinkage-compensated micro-concrete designed for large volume structural repairs. Supplied as a single-component dry powder, it requires only the addition of clean water on-site to produce a durable, self-compacting repair material ideal for areas where access is limited or reinforcement is congested.

Formulated with supplementary cementitious materials (SCMs) and optimised aggregate grading, Renderoc LA55 Plus offers improved environmental sustainability, low water demand, excellent workability, and exceptional strength development. Its unique dual expansion system provides outstanding control over both plastic and long-term drying shrinkage.

Key Features:

• Achieves up to 75 MPa compressive strength at 56 days

• Suitable for placement in sections up to 500mm thick

• Exceptional flow – no vibration or compaction required

• Shrinkage compensated – for dimensional stability over time

• Low alkali content – minimises the risk of alkali-silica reaction (ASR)

• Extremely low permeability – provides long-term protection from chloride and carbon dioxide ingress

• Excellent thermal compatibility with existing concrete

• Strong bond to concrete substrates – no primer required

• Pre-blended and consistent – only water addition needed on-site

• Environmentally friendly formulation using SCMs to reduce carbon footprint

Typical Uses:

• Reinstatement of large or deep concrete sections such as columns, beams, decks, and pile caps

• Structural repairs in civil infrastructure, marine, industrial, and transport applications

• Ideal for congested reinforcement zones and locations where access is difficult

• Suitable for use in areas affected by ASR and environments requiring high durability

Packaging:
20kg bag

Coverage:
Approximately 11–12 litres per 20kg bag (varies depending on placement and wastage)

Compressive Strength:

• 75 MPa at 56 days

• Compatible with concrete strength grades from 30 to 75 MPa