Thoroughly clean all existing sealant and dirt that may remain on switch. Replace the switch if
corroded. The sealant must have a clean surface to adhere to or there will not be an effective seal.
After switch is cleaned and reassembled or replaced, apply sealant. Cover the switch and terminals
completely with sealant. Press sealant into and around the terminals to ensure complete
Sealant will set in 15-30 minutes depending on temperature and humidity.
Loctite Retaining and Sealing Compounds. These compounds will resist solvents, heat, shock and
vibration. They provide a positive seal against leakage and sheer strength resistance to loosening when
used in the assembly of threaded, slipfit or press fitted parts. Use the grade of Loctite specified. Once
cured, these compounds have an operating temperature range of -65 to 300 degrees F (-54 to 149
degrees C), and will resist attack by oils, chemicals, hydraulic fluids and solvents. Do not use Loctite
where other retaining means are provided, such as lock wires, lock washers, lockplates and fasteners.
Do not substitute grades or usage unless specified. Do not use Loctite on items that need frequent
servicing, brass fittings or plugs, or when operating temperatures exceed 300 degrees F (149 degrees
C). (Example: Engine exhaust systems.) Loctite is applied as follows:
Threadlock Adhesives. Primers are not required with threadlock adhesives, but if used will speed
up the cure and act as a cleaner. Surface preparation depends on type of metal and purpose of
application. In general, most surfaces must be cleaned thoroughly.
Apply Loctite to bolts and studs by filling full length of thread with one strip in diameters up to 1
inch, two strips, 180 degrees apart, on diameters up to 2 inches, and three strips, 120 degrees
apart, on diameters over 2 inches. Apply one strip into tapped holes. For blind hole applications,
apply enough Loctite to fill the bottom 2 to 3 threads of engagement, then insert stud. If
engagement length exceeds one diameter, use proportionally more Loctite. For non-seated studs
(studs that to deeper in hole than required) turn stud one turn deeper than required. After bubbling
stops, apply a ring of Loctite around stud at top of hole, then back stud to required height. Loctite
will set in 10 minutes to 2 hours. Temperature and humidity affect drying time.
Plastic Gasket. Plastic gasket is used as a seal on large close fitting metal parts. Mating surfaces
must be clean and degreased. Spread an even coat (0.061 cubic inch per 40 square inches) on
one of the mating surfaces. Assemble and tighten bolts. Plastic gasket will dry in approximately
12-24 hours. Temperature and humidity affect drying time.