PRODUCT INFO: Sodium silicate solution, also known as waterglass, or liquid glass is a colorless water-based liquid. Dries to a clear solid form that can withstand temperatures up to 2000F Uses: Commonly used as a high temperature adhesive for ceramic fiber blanket, boards and other refractories. Sodium silicate is also used in making pottery, ceramics, concrete sealing, automotive repair and fire protection. Size: 4 oz bottle SPECIFICATION: 40% solution, grade N, viscosity similar to maple syrup. Made in the USA by Lynn Manufacturing, Inc. Lynn 5602 High Temperature Adhesive, 2000F Rated, Sodium Silicate, Water Glass, 40% Solution, 4oz bottle