Food-Grade Silicone is a polymer that can be used to form a reusable bag and its closure. It is approved for use in products that come into direct contact with food and can be used in temperatures up to 425° F.

K-Color-BL-70 is a colorant, or dye. We add dyes to products for a variety of reasons including helping you see where you applied the product, when a product is used up, or for aesthetic reasons. K-Color-BL-70 is added for aesthetic reasons – it is used to add color to a bag. It is a product of Shin-Etsu, which is responsible for its contents.