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INTRODUCTION LOCTITE USAGE
SURFACE PREPARATION
Plain and Phosphate Coated Parts
Clean surfaces where compounds are to be applied to remove heavy coating
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 as received condition provided it is dry to touch.
Zinc or Cadmium Plated Parts or For Rapid Curing of Compound
At least one mating surface should be degreased with a cleaning solution to
which concentrated primer has been added, (1 part primer concentrate to 30
parts trichlorethylene). Allow surfaces to dry for 3 to 5 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). Allow surfaces
to dry for 3 to 5 minutes before applying compound. In blind holes, be sure to
remove all chips and oil.
Face Sealant
Mating parts must be cleaned as for plain and phosphate coated parts.
APPLICATION
Bolt and Pipe Threads
Fill first 2 to 3 leading threads in area of engagement with compound. For larger
quantities of bolts, compound may be applied by thumbing method.
Studs
Fill full length of thread with one strip on diameters up to 25.4 mm (1 in), two
strips 180E apart on diameters up to 50.8 mm (2 in), and three strips 120E apart
on diameters over 50.8 mm (2 in).
In all cases, only apply one strip into tapped hole. On blind hole applications,
apply enough compound to fill bottom 2 to 3 threads of engagement, then insert
stud. If engagement length exceeds one diameter, use proportionally more
compound. For non-seated studs turn stud one turn deeper than required. After
bubbling stops, apply compound around stud at top of hole, then turn back to
required height.
Primers
Apply primer to surface where sealant is to be applied. Allow primer solvent to
evaporate 3 to 5 minutes before applying sealant. When sealant is applied to
a primed surface, parts should be assembled within 3 minutes.
Face Sealant
For liquid sealants, spread an even coat on one of mating surfaces. Assemble
and tighten bolts. For gel sealant, apply as continuous bead to surface of one
mating face.
REMARK
When compound is used as a gasket, bolts which attach parts should be
coated with mpl (gear lube) to prevent compound from sticking to bolts.
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