TM 10-8400-203-23 I 2-6.   REPAIR   AND   MAINTENANCE   OF   PNEUMATIC   MATTRESS–Continued (5) Apply one coat of cement to the top of the flange and to the surrounding area of the mattress (the 4 1/2 inch (11.43 cm) diameter abraded area) and to one side of the circular reinforcement piece. Allow the coats to dry at room temperature for 15 to 30 minutes. Apply a second coat to the top of the flange and the surrounding area of the mattress (4 1/2 inch (11.43 cm) diameter). Set the reinforcing piece over the top of the flange, after the second coat has dried at room temperature for two to three minutes. Roll down the entire cemented unit. (6) After repair, dust the smaller areas of exposed cement with talc, starch, or soapstone. d.   Body   Patching. (1) (2) (3) (4) (5) The  repair  kit  (NSN  8465-00-753-6335)  is  satisfactory  for  punctures  and  short  tears;  however,  in production repair the use of bulk adhesive and patches from salvaged mattresses is recommended. Repair procedure is as follows: Cut a patch overlapping the damaged area with a margin of at least 3/4 inch (1.9 cm) on all sides. Apply a medium-thickness brush coat of cement (NSN 8040-00-515-2246) to the patch and mattress at area of repair. Allow the coats to dry at room temperature for 15 to 30 minutes. Apply a second coat. Dry the second coat at room temperature for two to three minutes. Apply the patch over the damaged area. Roll down the entire cemented area. Dust the area with talc, starch, or soapstone. NOTE Do  not  inflate  for  at  least  24  hours  after  cementing.  Replace  defective  or missing  inflating  tube  stoppers  (NSN  8465-00-319-4183). e. Border   Seams. (1) (2) Equipment shall consist of a sewing machine with these recommended accessories: Use the finest practicable  size  chrome  plated  round  point  needle,  Teflon  presser  foot,  knurled  feed  dog,  Singer needle cooler. Thread may be run over a pad saturated with water. Use no wax, oil, or grease thread lubricant. Avoid high sewing speeds. Stitch Type 301; 8 to 10 stitches per inch. The repair consists of cementing together the separated border seam, stitching the seam along the inner edge and sealing the stitch holes. The detailed procedure is as follows: (a) (b) Open the blown-out seam so that the seam separation extends the full width of the seam, i.e. the separated area is squared off. Prop the seam open and apply a heavy coat of cement to both sides of the open seam. (Excess cement beyond the seam will do no harm). 2-12