Lube Adhesive & Engineering Co.

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PRODUCT DESCRIPTION LOCTITE® 518™ provides the following product characteristics: Technology Acrylic Chemical Type Dimethacrylate ester Appearance (uncured) Red gel-like material Fluorescence Positive under UV light Viscosity Thixotropic Cure Anaerobic Secondary Cure Activator Application Sealing Strength Medium LOCTITE® 518™ is a single component, medium strength, anaerobic sealant which cures when confined in the absence of air between close fitting metal surfaces and provides resistance to low pressures immediately after assembly of flanges. The thixotropic nature of LOCTITE® 518™ reduces the migration of liquid product after application to the substrate. LOCTITE® 518™ provides robust curing performance. It not only works on active metals (e.g. mild steel) but also on passive substrates such as aluminum with a low copper content. The product offers gap performance to 0.25 mm (0.01 in) and contamination tolerance. It cures in the presence of minor surface contaminations from various oils, such as cutting, lubrication, anti-corrosion and protection fluids and cleaners containing surfactants and corrosion inhibitors. Typical applications include sealing close fitting joints between rigid metal faces and flanges as a form-in-place gasket, e.g. gearbox and engine casings, etc.TYPICAL PROPERTIES OF UNDRIED MATERIAL Specific gravity @ 23°C 1.1 Viscosity, Brookfield - HBT, 25°C, mPa·s (cP): Spindle TC, Speed 0.5 rpm, Helipath 4,000,000 Instant sealing capability Anaerobic sealants have the ability to resist low on-line test pressures while uncured. This test was performed with uncured product immediately after assembly of an annular steel sealing surface with an internal diameter of 50 mm (2 in) and an external diameter of 70 mm (2.8 in). Note: Instant sealing capability by application of pen roller will be limited to 0.125 mm (0.005 in) due to the applied film thickness. Pressure Resistance, MPa: Induced Gap 0.05 mm Induced Gap 0.125 mm Induced Gap 0.25 mm 1.35 0.14 0.1Cured for 24 hours @ 23°C Compressive shear strength, ISO 10123: Steel pins and collars N/mm2 (psi) 5 (730) Lap Shear Strength: Mild Steel (Grit Blasted) N/mm2 (psi) 8.4 (1,220) Mild Steel N/mm2 (psi) 5.5 (800) Aluminum N/mm2 (psi) 5.4 (780) Aluminum (Alclad) N/mm2 (psi) 2.2 (320) Mild Steel (grit blasted) to Aluminum N/mm2 (psi) 6.7 (970) Cured for 72 hours @ 23°C Lap Shear Strength: Mild Steel (Grit Blasted) N/mm2 (psi) 11 (1,530) Mild Steel N/mm2 (psi) 5.5 (800 ) Aluminum N/mm2 (psi) 5.8 (840) Aluminum (Alclad) N/mm2 (psi) 1.6 (230) Mild Steel (grit blasted) to Aluminum N/mm2 (psi) 6.7 (970)Tensile Strength, ISO 6922: Grit blasted mild steel pin N/mm2 (psi) 10 (1,450) Aluminum pins N/mm2 (psi) 13 (1,930) Sealing Capability An annular shaped gasket with an inner diameter of 50 mm and an external diameter of 70 mm was tested up to 1.3 MPa for leakage (immersion in water for 1 minute). Product was cured for 20 hours. Sealed to maximum induced gap, mm: Mild Steel Aluminum 0.25 0.25 TYPICAL ENVIRONMENTAL RESISTANCE The following tests refer to the effect of environment on strength. This is not a measure of sealing performance. Cured for 1 week @ 23°C Lap Shear Strength, ISO 4587: Steel (grit blasted)