Pavemend KemROK is a rapid return to service, chemical and hydrogen sulphide resistant pozzolan cement repair concrete. It is a single component powder that is water activated. KEMROK packaged units have 30 minutes of working time and will reach compressive strengths of greater than 3,000 psi in 3 hours. KEMROK can be applied in ambient temperature ranges from 40 degrees F–120 degrees F, places and finishes like traditional concrete and cleans up easily with water. KEMROK has been engineered for low permeability and is resistant to chemical attack by sulfuric compounds and related acids.