All hardeners reach sufficient strength for return to service after overnight ambient cure. The fastest Rhino hardener, Rhino 3102, is useful for winter applications, and in smaller applications requiring a fast return to service time. Rhino 3103 is the standard 30-minute system hardener used for 4:1 volume mixing applications. Rhino 3138 should be used in high temp applications (up to 240˚F) and is 4:1 by volume, which is also useful in hot weather and for long or large diameter pipe runs. Rhino 3191 is the standard 1 hour General Purpose curing agent used for 2:1 volume mixing applications.
Rhino CIPP hardeners, 3102, 3103 and 3191 are DOT not regulated / DOT non-corrosive, minimizing hazardous materials shipping issues.