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Permatex Blue RTV Silicone Gasket Maker Quantity in Basket: None Code: 6517 Price: $5.29 Shipping Weight: 0.50 pounds Quantity: The original Blue. 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