Loctite 638 Very Strong Synthetic Resin Monocomponent anaerobic product. Hardening at low temperatures (-55°C to 150°C). Average viscosity. Extra strong. Quick hardening. Recommanded by SSIGE (gaz). Used: Assembling of cylindrical fittings (crowns, winding stems, screws). Can be used as strong lock thread and can not be dismantled. Technical characteristics: Colour: Green Viscosity Brookfield mPa.s: 1’800 -3’300. Manipulation time steel/steel: ˜ 3 min. Put into service: after 12 hours. Shearing proof DIN 54452: 20-35 N/mm2.