Ajusas Ajusil Silicone Sealant is a high performance, quick curing gasket maker and sealer intended for use between surfaces when there is no formed gasket specified by the OE vehicle manufacturer. Ajusil is produced using only the highest quality base materials and is resistant to oil, water, antifreeze, gas, and a wide range of greases. Ajusil maintains a leak free seal in temperatures that range from -76 F(-60C) to +572F (+300C). Manufactured to strict engineering standards to ensure only the highest quality sealant. Sold individually. Established in 1972, Ajusa is one of the worlds leading manufacturers of gaskets, cylinder head bolts, and hydraulic lifters. Ajusa offers the widest coverage for European and Asian applications, especially late model vehicles.