OTTOSEAL® S 25 - The acetate high-temperature silicone. Characteristics: 1-component acetate-• curing silicone sealant • Extraordinary high temperature resistance up to +300 °C • High adhesive power. Fields of application: • High temperature resistant and still elastic bonding and sealing, e. g. for cast member heating boilers, exhaust boxes, tile stoves etc. • Also suitable for applications in automotive areas for engines and gearboxes. Standards and tests: • UL 94 Flame Classification HB, RTI 105 °C, File No. E 176319. Additional useful information: The difference between the two high temperature silicones, OTTOSEAL® S 17 and OTTOSEAL® S 25, lies in the manner of curing: OTTOSEAL® S 17 is a neutrally curing sealant based on oxime; OTTOSEAL® S 25 is an acetate curing sealant. The very fast curing and high adhesive power of OTTOSEAL ® S 25 complement its extraordinarily high long- term temperature resistance of up to +300 °C. Please note that the silicone can be processed at temperatures between +5 °C and +40 °C. The thicker the coating, the longer the silicone takes to vulcanize. For applications with coatings thicker than 15 mm please contact our technical department.