Ductseal Compound Seals Around Junction Boxes, Flashing, Service Mast Entries, - Service Cable Entries and Countless Other Applications. - Easy To Use, Forms Around Irregular Surfaces & Configurations. - Highly Resistant To Cracking, Drying and Shrinking. - Cuts And Trims Easily. - Can Be Painted Immediately After Application. - Gray Color. - +20F to 212F Workable Temperature Range.