High-Temperature Sealants

Cerablak® HTS represents a revolutionary advancement in the sealing of materials with fine open porosity. Gaseous or vapor ingress into fine pores have plagued the performance of materials such as refractories for many decades and the problem is growing as temperatures are being increased in industrial applications. With Cerablak® HTS comes an elegant solution, resolving sealing issues in a wide range of porous materials, including refractories, advanced ceramics and composites, and thick ceramic coatings. Most importantly, the sealant does not detrimentally impact designed thermal or mechanical properties. The process of applying the sealant is simple and utilizes a shelf-stable clear chemical formulation. A vacuum infiltration scheme is used to infiltrate fine porosity and deposit a hermetic-quality barrier film on the pore walls which helps limit diffusion of environmental species into the bulk, thus preventing corrosion. In some cases, the material can be essentially sealed against gas diffusion as proven by helium leak testing.