GENERAL INFORMATION - SEALING COMPOUND USE
LOCTITE RETAINING AND SEALING COMPOUNDS
These products are single component, self- curing,
polyester compounds which remain liquid while exposed
to air, and harden by chemical action into tough
structural solids when confined between closely mated
metal parts. These compounds will resist solvents, heat,
shock and vibration and are intended to provide a
positive seal against leakage, and shear strength
resistance to loosening when used in the assembly of
threaded, slip fit, or press fitted parts.
Loctite Grades (General Usage)
1. GRADE B (YELLOW) - Straight threaded fasteners.
2. GRADE "AVV" (RED) - Straight threaded fasteners;
higher strength for studs, etc.
3. PLASTIC GASKET (RED) - Use as seal between
mating surfaces (face sealant).
4. HVV (UNFILLED PIPE SEALANT) - Use on tapered
5. HYDRAULIC SEALANT - Use on fuel fittings with
straight pipe threads.
NOTE: Once cured, these compounds have an
operating temperature range of -55° C to 150°C (-65
to 300°F) and will resist attack by oils, chemicals,
hydraulic fluids and solvents.
Exceptions DO NOT use Loctite:
1. Where other means of retaining the assembly are
provided such as, prevailing torque fasteners (fasteners
with distorted threads or plastic inserts), lock washers,
lock plates and lock wires.
2. On items requiring frequent servicing.
3. When the operating temperature exceeds 150°C
(300°F). (Example: Engine Exhaust Systems).
4. On brass fittings and plugs.
Plain and Phosphate Coated Parts
Clean the surfaces where compounds are to be applied
to remove heavy coatings of oil grease and dirt (rust or
light oil film are not detrimental). Normal shop practice
of cleaning or degreasing is adequate. Phosphate and
oiled hardware is used in the "as received" condition.
Zinc or Cadmium Plated Parts or for Rapid
At least one of the mating surfaces should be degreased
with a cleaning solution to which concentrated primer has
been added. (1 part primer concentrate to 30 parts
trichlorethylene or 1-1-1 trichlorethylene). Allow surfaces
to dry for 3 to 6 minutes before applying compound.
Drawbar Studs or Special Stud Applications
Degrease parts with a cleaning solution to which
concentrated primer has been added. (1 part primer
concentrate to 30 parts trichlorethylene or 1-1-1
trichlorethylene). Allow surfaces to dry for 3 to 6 minutes
before applying compound. In blind holes be sure to
remove all chips and oil.
Face Sealant (Plastic Gasket)
Mating parts must be cleaned as for plain and phosphate
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