Extra Solids Acrylic Urethane Clearcoat Activators are specifically designed for high productivity shops using Transtar Finish-Tec Clearcoats. Activators are suitable for use in clearcoat applications over single stage topcoats and for base/clear applications (except lacquers). #6871/6874/6877, Spot Panel Activator is designed for use in temperatures between 65 – 80F (19 – 27C) or for spot panel applications.