Resbond 907 GF 2300°F adhesive sealant successfully seals exhaust ducts against corrosive chemicals and high heat. User simply applies the adhesive and lets it dry. It cures in 4-12 hours to form a hard ceramic with excellent resistance to chemicals, solvents, electricity, oxidizing and reducing atmospheres. It is ideal for use in any high temperature assembly production or repair applications. It bonds to metals, glass, ceramics, ceramic tapes, iron and instrumentation. Cotronics Corp. 131-47th Street Brooklyn, NY, 11232