Product Overview

Renderoc UW is a specialist underwater-applicable, non-washout, single-component cementitious repair mortar from Fosroc designed for repair of deteriorated concrete in permanently submerged locations, tidal zones, and areas with continuous water presence where conventional repair mortars cannot be applied without dewatering. Conventional cementitious repair mortars applied in the presence of water suffer rapid washout — water flowing over or through fresh mortar carries away the cement paste before it can hydrate and set, leaving a weak sand-rich residue with no structural value. Renderoc UW is formulated with anti-washout admixtures that increase cohesion and viscosity of the cement paste, binding the mortar together sufficiently to resist water erosion during the critical early period before the cement hydrates and the mortar gains strength. This anti-washout characteristic allows the mortar to be applied by divers in submerged conditions, by bagging (squeezing mortar from a bag into the repair void while submerged), or by application in tidal zones during brief periods of low water, without the mortar being washed away before it sets. Once hardened, Renderoc UW achieves comparable compressive strength to conventional polymer-modified repair mortars and provides durable bond to the concrete substrate in the submerged environment. It is used for pile and pile cap repair in marine ports, repair of submerged weir and dam concrete, repair of underwater sluice gate frames, and repairs in water-retaining structures that cannot be emptied for repair works. Space Arc Engineering distributes Renderoc UW for marine, port, and hydraulic structure concrete repair projects across Delhi NCR, Ghaziabad, and Northern India.

Applications

• Submerged pile and pile cap repair in marine port and jetty structures
• Underwater repair of weir, dam, and barrage concrete
• Tidal zone concrete repair on coastal and riverine structures
• Repair of sluice gate frames and valve chamber concrete in water retaining structures
• Water treatment plant and reservoir concrete repair without full dewatering
• Submerged retaining wall and abutment repair in riverbank protection

Key Advantages

• Non-washout formulation resists water erosion before setting in submerged conditions
• Can be applied by divers using bagged placement in fully submerged locations
• Achieves high compressive strength after submerged curing
• Good bond to concrete substrate in wet and submerged conditions
• Single-component — consistent quality with simple site mixing
• Compatible with the Fosroc Renderoc range for complete repair system