Penguin Pottery's Sodium Silicate Solution is used to deflocculate (ie. prevent lumping) casting slips. This solution is water-soluble and is made with soda and silica. Over time, plaster will absorb the solution and will deteriorate / erode. Sodium Silicate can also be used to create a crackled texture on ceramic surfaces. Please note that sodium silicate will be damaged if frozen or kept in cold temperatures. About Penguin Pottery Supplies: Penguin Pottery was founded in 2020 with a simple mission: to increase access to a wide range of pottery and ceramic arts supplies, while doing so in an ecologically-responsible way. When you purchase a Penguin Pottery product, you are supporting a company that is committed to always explore ways to combine our passion for pottery with our love for our planet. Thank you for your support. PREVENT LUMPING IN CLAY SLIP CASTING - Deflocculate casting slips (ie. prevent lumping). Our sodium silicate causes the particles of clay to repel one another and remain suspended. Please note that, over time, plaster will absorb the solution and will deteriorate / erode. CREATE A CRACKLED SURFACE - If you want to achieve a super-interesting crackled clay surface, you can apply Penguin Pottery sodium silicate to your piece right after you finish throwing (before you fire it). Just apply with a brush, wait until it dries, and the place your hands inside the piece and expand the sides. HIGH TEMPERATURE ADHESIVE FOR RAKU KILNS - Can be used to bond various types of fiberglass sheets, with excellent resistance to high temperatures, making it suitable for bonding fiberglass sheets used in making a Raku kiln.