Toro ProLine H800 Service Manual page 32

Thread sealant
Used to seal threaded fittings and sensors from air, fuel, and oil pressure leaks and prevent galling and
seizure between threaded parts. A thread sealant in paste firm is preferred over sealant tape. The
sealant should remain semi-pliable to allow for component removal with standard tools. Some thread
sealants may require the use of a cleaner or primer before use.
Gasket compound
Used to create a seal between mating parts. Gasket compounds may be used with or without the
presence of a pre-formed gasket. Gasket compounds may be solvent or silicone based, and cure when
exposed to air or designed to cure in an air-less environment (anaerobic). Most gasket compounds are
designed to be applied to clean surfaces free of oil, chemical residue and previously used gaskets
or gasket compounds.
Silicone sealant
Designed for a broad variety of sealing and bonding requirements, silicone sealants are usually room
temperature vulcanizing (RTV) which form a flexible silicone rubber that bonds to a wide variety of
smooth or porous materials when cured. Standard silicone sealants are designed to perform in
temperatures from -51°F to 232°C (-60°F to 400°F), while high temperature variants can preform
in temperatures up to 343°C (650°F).
Specifications and Maintenance: Shop Supplies Page 2–14 ProLine H800
19241SL Rev A