Product Overview

Fosroc Renderoc HS Xtra is a single-component, polymer-modified, cementitious, shrinkage-compensated structural repair mortar. Simply add water to produce a workable, cohesive mortar that achieves very high early and ultimate compressive strengths — making it ideal for structural repairs where rapid reinstatement to service is needed. The polymer modification ensures excellent adhesion to existing concrete without a separate bonding primer in most applications, and the shrinkage compensation eliminates the cracking and debonding failure modes common in plain cement mortars. It is suitable for hand-applied repairs from 10mm to 40mm depth, and can be trowel, rod, or form-and-pour applied depending on repair geometry.

Typical Applications

• Structural column, beam, and slab soffit repairs
• Bridge deck and parapet repairs
• Carbonation and chloride-induced corrosion repair
• Spalling and honeycombing reinstatement
• Blast damage and impact repair
• Industrial floor and ramp edge reinstatement
• Repair of precast concrete elements
• Overhead and vertical face repairs (with anti-sag properties)

Key Advantages

• Single-Component: Just add water — no separate polymer liquid to proportion on site. Pre-blended factory quality control eliminates dosage errors
• High Early Strength: Achieves significant strength gain in 24 hours — enabling faster reinstatement of structural elements and minimising programme delays on live structures
• Zero Shrinkage: Shrinkage compensation prevents the classic failure mode of repair mortars — cracking at the repair perimeter — ensuring long-term durability and bond integrity
• Excellent Adhesion: Polymer modification gives exceptional adhesion to prepared concrete substrate — typically causes substrate failure in pull-off tests rather than adhesive failure at the interface
• Chloride-Free: Contains no chlorides — safe for use in reinforced and prestressed concrete without accelerating steel corrosion