TM  10-3930-643-34 GENERAL  MAINTENANCE  PROCEDURES. 2–12. Application  of  Adhesives. (2) 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. (3) Unfilled pipe sealant. Pipe  sealant  MIL-S-22473D,  Product  CW,  seals against  moderate  pressures  instantly  and  working  pressures  when  completely  dry. Before  application, clean threads to remove oil, grease and metal chips. Fill the  second  and  third  threads  completely  for 360  degrees. For system cleanliness,    do not fill leading thread. Pipe sealant will dry in 6-24 hours at room temperature. Adjustments for elbows, gages and valves can be made up to 24 hours after application without affecting seal. 2-9