Comprare to translucent mold making silicone rubber, this silicone kit is designed with vibrant teal colors. You can easily see whether part A and part B are mixed evenly thanks to the bicolor appearance; The mix ratio is 1:1 by weight. Just pour the equal Part A and Part B together, then stir the for 3 minutes; the working time is within 30 minutes and the cure time is 4 hours at room temperature.