TM  1-1520-240-BD o. Application of Adhesive System No.  1P. WARNING The adhesives under this system are toxic.   Work   only   in   well-ventilated area. (1) (Refer  to  Table  2-5  for  list  of  acceptable adhesives.)    Clean    faying    surfaces    using    naphtha. Roughen   area   slightly   with   abrasive   paper   (item   39, Appendix C). (2) Place  9  parts,  by  weight,  of  curing  agent (item   81,   Appendix   C)   and   100   parts,   by   weight,   of adhesive (item 17, Table 2-5) into a dean container and mix thoroughly. (3) Brush one coat of adhesive on each ply of repair part. (4) Assemble plies while still wet, on a Teflon sheet. (5) Brush final coat of adhesive on assembled plies. (6) Place  assembled  plies,  with  Teflon  sheet exposed, on area to be repaired. (7) Remove entrapped air by working a roller across the patch. (8) Apply  a  slight  pressure  to  repaired  area with wooden blocks and C-clamps. (9) Allow   repaired   area   to   cure   4   hours   at 70°F (21°C) or use head lamps and cure area at 1500 to 170°F (66^o to 77^oC) for 1 hour.  Remove blocks, clamps, and Teflon sheet. p. Application of Adhesive System No.  13. WARNING The adhesives under this system are toxic   and   may   be   irritating   to   the skin.      Work   only   in   well-ventilated areas  and  avoid  bodily  contact  with adhesives. (1) (Refer  to  Table  2-5  for  list  of  acceptable adhesives.)   Roughen   faying   surfaces   to   be   bonded, using abrasive paper (item 9, Appendix C). (2) Clean    faying    surfaces    using    aliphatic naphtha.  Refer to paragraph 2-13c. (3) Allow    area    to    dry    thoroughly    prior    to applying cement. (4) Apply  masking  tape  (item  145,  Appendix C) to adjacent areas. (5) Place 4 fluid  ounces of cement resin into a dean earthenware container. (6) Add  one  capsule  (2.4  grams)  of  catalyst (item 48, Table 2-5) to cement resin and stir resin until capsule is completely dissolved. NOTE This mixture can be kept usable for a period   not   to   exceed   24   hours   by refrigeration at 40°F (4°C) or lower. (7) Place    5-cubic-centimeters    of    promoter (Item 121, Table 2-5) into a dean container. WARNING Do   not   mix   promoter   directly   with catalyst   as   a   violent   reaction   will result. The cement contains chemicals    which    may    irritate    the skin.    If  contact  with  skin  is  made, wash     the     area     immediately     with isopropyl alcohol (item 93, Appendix C)   and   flush   with   soap   (item   140, Appendix C) and water. All operations should be performed in a well-ventilated  room  as  vapors  may be toxic. (8) Add  promoter  to  mixture  of  cement  resin and catalyst, and stir ingredients thoroughly. NOTE The pot life of adhesive mixture with promoter  added  is  approximately  10 minutes. (9) Brush  on  a  thin,  uniform  coat  of  cement on both faying surfaces. 2-56