FuelCell Energy, Inc.
WET SEAL CAULK WITH ENHANCED CHEMICAL RESISTANCE

Abstract:

A caulk composition includes: at least one powder component and at least one binder component. The powder component is a ball-milled powder component comprising ceria, zirconia, alumina, or a combination thereof. The powder component is a heat-treated powder component that has been heated to a temperature of at least 1500.degree. C. The powder component is present in a concentration range of 65 wt % to 75 wt % of the caulk composition. The powder component has a particle size distribution of 95% less than 25 .mu.m and 90% greater than 1 .mu.m. The binder component is present in a concentration range of 25 wt % to 35 wt % of the caulk composition.