Permatex Dual Purpose: Permanent Strength Threadlocker Red: Protects Threads From Rust And Corrosion; Uses: Cylinder Block, Ring Gear, And Transmission Bolts; Permanently Locks Fasteners 3/8" To 1" (10 To 25 Mm) In Size; Engine Block Cup And Core Plugs; Fixture In Approximately 20 Minutes And Are Fully Cured Within 24 Hours. Permatex, Made For The Professional. Made In U.S.A. Oem Specified. Protects Threads From Rust & Corrosion.