Hylomar Universal Blue sealant was originally developed by Rolls-Royce Plc Aerospace Division for sealing joints in jet turbine engines. Hylomar is a polyester-urethane based sealant that transforms from a gel-like material into a re-sealable, non-setting, non-hardening putty within minutes of application. Because it is non-setting, Hylomar sealant offers unlimited assembly time and is resistant to vibration and thermal expansion.
Hylomar Universal Blue sealant retains its unique properties of being non-setting and permanently plastic when operated within the allowable temperature range for each specific grade or formulation. Regardless of which grade of Hylomar sealant you use, each is formulated using a combination of individual fine particles combined in a gel base. This method of formulation makes Hylomar effective for use in conjunction with gaskets as it fills micro-size gaps commonly found on coarsely machined components. As a gasket dressing, it assists in the location and fitting of the gasket during assembly. The non-setting features of Hylomar allow for easy disassembly and removal of parts and gaskets compared to many traditional gasketing materials.
Hylomar Universal Blue sealant can be used as a gasket dressing or to seal flanges with or without a gasket. Other uses include sealing finely machined joint faces (with gaps less than .01"), threaded joints, pipe threads, nuts, bolts, cylinder heads, manifolds, axles and axle assemblies. Hylomar is resistant to a wide range of fluids including most industrial fuels, gasoline, kerosene fluids, oils, air turbine combustion products, piston engine combustion products, fluorocarbon refrigerants, water/glycol mixtures, water/brine mixtures and methanol mixtures.