TM 1-1520-240-BD Table 2-5.  Acceptable Adhesives - Continued MANUFACTURER’S ITEM NO. ADHESIVE DESIGNATION SYSTEM NO. 24 190-H-1 Resin 191-C-21 Catalyst 25 190-H-1 Resin 190-B-10 Catalyst 10 34 Pro-Seal 501 11 26 EC-1239 33 Pro-Seal 719 36 PR9021 12 17 Epon 828 81 Curing Agent DTA 13 53 PS-18 Cement 48 PS-18 Catalyst 121 PS-18 Promoter f. Application of Adhesive System No.  4. WARNING The adhesives under this system are toxic  and  flammable.    Work  only  in well-ventilated areas away from flame. (1) Refer  to  Table  2-5  for  list  of  acceptable adhesives.  Clean all faying surfaces with methyl-ethyl- ketone. (2) Brush  one  uniform  coat  of  primer  (item 35,   Table   2-5)   on   all   faying   surfaces,   except   rubber surfaces. Allow the primer to dry for 30 to 60 minutes. (3) Thoroughly  blend  20  parts,  by  weight,  of the adhesive base with 1 part, by weight, of accelerator. NOTE The pot life of blended adhesive is 24 hours. (4) Bond rubber to surfaces other than rubber as follows: (a) Brush  one  uniform  coat  of  blended adhesive on rubber surface.  Allow it to dry for 30 to 60 minutes. NOTE Both  adhesives  may  be  cured  in 3 hours by maintaining a temperature of 150 F (66°C). For    best    results    the    adhesive should be 0.002 to 0.003 inch thick. (b) Brush  a  second  coat  on  one  of  the surfaces and allow it to dry until tacky. (c) Join  coated  surfaces  with  sufficient pressure to ensure solid contact. (d) Allow adhesive to cure under pressure for 16 hours at 700F (21.1 °C) before handling. NOTE Complete   cure   is   achieved   after   7 days  at  70°F  (21.1°C,  or  in  16  hours at    70°F    (21.1    °C),    followed    by    1 hourat2000F (930C). (5) Bond  rubber  to  rubber  as  follows:    Brush one   uniform   coat   of   the   blended   adhesive,   on   both faying surfaces and allow it to dry for 30 to 60 minutes. 2-52