The Permatex Sensor-Safe Blue RTV Silicone Gasket Maker Adhesive 75153. OEM specified. The original Permatex Blue now with low odor formula. Will not foul oxygen sensors. Replaces almost any cut gasket. Makes reliable “formed-in-place” gaskets that resist cracking shrinking and migrating. Coats pre-cut gaskets to increase reliability. Temperature range -65°F to 500°F (-54°C to 260°C) intermittent; resists auto and shop fluids. Permatex Sensor-Safe Blue Rtv Silicone Gasket Maker #1 Choice Of Professional Mechanics. Makes Any Size Or Shape Gasket Is Flexible Waterproof And Tough And No Re-Torque Is Needed. Permatex Made For The Professional. Pressure Resistant. Makes Any Size Or Shape Gasket. Gasket Maker Or Dressing Remains Flexible. Adhesive form - Silicone