Home / Tools & Supplies / OIls, Chemicals & Liquids / Paint, Activator, HT, Transtar Paint, Activator, HT, Transtar$68.00 Paint, Activator, HT, Transtar quantity Add to cart SKU: L4025-HT Category: OIls, Chemicals & Liquids Description Description 1 Quart Activator for Clearcoat. A High Solids Overall Activator to be used with #L4020. This activator promotes a slower drying time which increases the time available to get the work done. “HT” designates this product for use in High Temperatures. In colder weather a faster activator should be used. Typically the activator is a 4 to 1 ratio. One quart will activate one gallon of Clearcoat.