Loctite Gasketing Agent 518 Loctite 518 is a gasketing agent for machined, rigid metal flanges. Sealing of rigid flanges on gearboxes and engine blocks. Instant sealing against low pressure. Specifications: Type: 518 Bottle colour: red Bottle material: plastic Bottle contents: 25 ml Strength: medium Technical specifications: Temperature range: -50 / +150 °C Diametral clearance: 0.25 mm Curing time: 25 minutes (steel), 20 minutes (aluminium) Viscosity: 500,000-1,000,000 mPa*s Tensile shear strength: 7.5 N/mm2