TM 10-3930-659-20 2-15. LUBRICATION INSTRUCTIONS. Refer to LO 10-3930659-12 for detailed, illustrated instructions on proper lubrication.  Some general practices to remember: (1) Use the correct lubricant. (2) Keep lubricants clean. (3) Clean all fittings prior to lubrication. (4) Lubricate clean disassembled and new parts to prevent rust (see paragraph 2-10). 2-16. APPLICATION OF ADHESIVES. a. General.    Adhesives  are  recommended  in  some  tasks  to  ensure  and  strengthen  seals.    The  following information describes their correct use and application. b. Silicone  Sealing  Compound.    Silicone  sealing  compound  (item  11,  Appendix  C)  is  used  to  seal  parts against moisture.  Use the following instructions when applying: (1) Anytime  a  seal  is  broken,  the  part  must  be  thoroughly  cleaned  to  remove  any  remaining  sealing compound and dirt. (2) Thoroughly clean surface before applying silicone sealing compound. (3) When applying silicone sealing compound, ensure that the area is completely covered.  Press silicone sealing compound into and around parts as necessary. (4) Silicone sealing compound will set in 15-30 minutes depending on temperature and humidity. c. Loctite Adhesive.  Loctite adhesive (Item 2, Appendix C) provides a seal against leakage and a resistance to  loosening  when  used  in  the  assembly  of  threaded,  slip-fitted,  or  press-fitted  parts.    Always  use  grade  of  Loctite adhesive specified and never use when other retaining means are provided, such as lockwires, lockwashers, lockplates, and  fasteners.    DO  NOT  use  Loctite  adhesive  on  brass  fittings,  plugs,  or  items  that  need  frequent  servicing,  or  when operating temperatures exceed 300F (149°C).  Apply Loctite adhesive as follows: (1) Before application, clean threads to remove oil, grease, and metal chips. (2) Apply Loctite adhesive to  second  and  third  threads.   DO  NOT  apply  to  first  thread  to  ensure  system cleanliness. (3) Loctite adhesive will dry in 6-24 hours at room temperature. (4) Adjustments  for  elbows,  gages,  and  valves  can  be  made  up  to  24  hours  after  application  without affecting the seal. 2-8