TM 1-1500-204-23-3 (5) Cuts,   Tears,   Chafing,   Scuffs,   or   Snags Torn/Cut Fabric. WARNING Acetone  and  repair  adhesives  are flammable  and  toxic.    Keep  away from heat, sparks and open flame. Wear  safety  glasses,  gloves  and protective     clothing     to     prevent contact.  Wear a NIOSH approved air-purifying respirator for organic vapors and work in a well ventilated area.  If contact occurs, flush   areas   with   water   and   get medical   attention.      If   ingestion occurs   get   medical   attention   at once. NOTE The    adhesive    should    be    used sparingly.        Two    (2)    thin,    even coats will provide better adhesion than   two   thick,   puddled   coats. Acetone  is  used  as  a  solvent  for the adhesive and, when the cemented  surface  appears  dry  to touch,   it   may   be   freshened   or made  tacky  again  by  application of acetone. (a)    Wipe the damaged area and surrounding  area  on  the  damaged  surface  of  the  cell with  a  piece  of  dean  cheesecloth  (item  16,  table  2-11) dampened  with  acetone  (item  3,  table  2-11)  to  remove any  foreign  material.    The  surface  must  be  absolutely dean and dry in order to apply the patch. (b)    Cut a patch from the fabric (item 19, table   2-11   for   interior   repair,   item   25,   table   2-11   for exterior repair) for the repair area The patch should be 3 inches  larger  in  all  directions  than  the  damaged  area. Hand  buff  this  material  lightly  and  thoroughly  on  the gum  side  with  emery  cloth  (120  grit)  (item  17,  table  2- 11).        Remove    buffing    dust    by    wiping    patch    with cheesecloth   (item   16,   table   2-11   )   dampened   with acetone (item 3, table 2-11). (c)    Hand   buff   damaged   area   of   cell lightly  and  thoroughly  with  emery  cloth  (120  grit)  (item 17,  table  2-11).    Area  to  be  buffed  should  be  slightly larger (1/8 to 1/4 inch) in size than the patch.  Remove buffing dust with a piece of dean cheesecloth (item 16, table   2-11)   slightly   dampened   with   acetone   (item   3, table 2-11). WARNING Repair adhesive is flammable and should   be   kept   away   from   any ignition source. NOTE Adhesive materials should be kept tightly sealed in individual containers in a cool, dry place. (d)    Refer     to     paragraph     c(1)(e)     for mixing instructions. NOTE Do not apply adhesive beyond buffed areas. (e)    Apply   one   coat   of   adhesive   (item 18,  table  2-11)  to  buffed  side  of  patch  and  buffed  area of cell, allow to dry 20-60 minutes. NOTE To determine if adhesive is tacky, test    it    by    pressing    a    knuckle gently against the cemented surface    and    withdrawing    it    (it practical).      Proper   tackiness   is achieved  when  a  few  threads  of adhesive    stick    to    the    knuckle. This  procedure  is  referred  to  as the knuckle test  NOTE If adhesive dry times are exceeded, reapplication of one coat of adhesive  may  be  done  only  once (total of three coats).  If dry time is again  exceeded,  remove  adhesive from  applied  area  using,  acetone and/or   buffing   with   emery   cloth (120 grit minimum). (f)    Apply   a   second   coat   of   adhesive (item  18,  table  2-11)  to  buffed  areas  of  patch  and  cell, allow  to  dry  until  tacky.    Adhesive  can  become  tacky within 2 to 4 minutes, depending on ambient temperature and humidity.  Perform knuckle test. (g)    If  necessary  to  restore  the  tack  of the cemented surfaces, use a dean piece of cheesecloth (item  16,  table  2-11)  dampened  with  acetone  (item  3, table   2-11   )   and   lightly   wipe   over   cemented   areas. Allow   solvent   to   evaporate   10-20   seconds   or   until cemented areas become "tacky." Change 2  2-62