Bulk LOT! Smooth-On Mold Star 15 Slow - 1 case of 4 Kits - 1 Gallon Total Silicone BULK LOT! Smooth-On MOLD STAR 15 SLOW 1 case of 4 kits - 1 Gallon Total Silicone Archival quality platinum silicone molding rubber Slower working time and cure time! 50 minutes pot life. 4 hours cure time. EASY to use! Equal 1:1 mix ratio