Penguin Pottery - Sodium Silicate Solution - Deflocculant - 16 oz Sodium silicate is used to prevent lumping when slip casting This solution is water-soluble Sodium Silicate can also be used to create a crackled texture on ceramic surfaces. Sodium silicate will be damaged if frozen (eg. shipping during winter months) 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, paster 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. To that end, our products are packaged as much as possible in recyclable, compostable or water-soluble materials. 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.