3M Plastic Repair System – Back Side/Front Side Repair

Backside/Front Side Repair

• Any time you are dealing with a cosmetic or structural repair on plastic bumper covers regardless of tears, rips or puctures, use the following 3M procedures..

Cleaning Step

1. Use soapy water and Scotch-Brite™ Hand Pad P.N. 07447 to clean dirt & road film on the front side, then the backside.

2. Use 3M™ General Purpose Adhesive Cleaner P.N. 08987 to remove solvent-based grime, asphalt, etc. from the backside.

3. Adhesive cleaner helps to evaporate the water from the repair area.

Heating The Bumper

• Contour lines often do not match.

• Heat the bumper to re-align the pieces.

• Use the contour lines as a guide.

• Quench with paper towel soaked with cold water.

V-Grind To Open Up The Crack

1. Use countersink die grinder bit to accomplish V-grind on front side then back side.

2. Note: if you drill a hole at the end of the crack to stop spreading, remember to dish it out.

3. Rough up repair area with grade 50 3M™ Roloc™ Disc P.N. 01396 on backside.

Taping the Front Side

• Use Scotch® Auto Body Repair Tape P.N. 06930

• Keeps panels from moving.• Keep tape a little loose. Press down on the

edges.• Keeps adhesive from oozing all over.• Allows for more effective cure of adhesive

from the backside.

Move To The Backside

• Rough up the repair area with grade 80 3M(TM) Imperial(TM) Hookit(TM) II Disc 00683 .

• Apply 3M™ Polyolefin Adhesion Promoter P.N. 05907. 1 or 2 passes.

• Wait 5 minutes to flash.• Use Duramix™ Plastic Repair Semi-Rigid P.N.

04240.• Use Duramix™ Reinforcement Patch P.N. 04904.

Equalizing The Cartridge

• Do not remove metal clip.• Unscrew cap.• Insert cartridge into MixPac® Applicator• Eject material so that both A & B are mixing

equally. Wipe clean.• Attach static mix nozzle.• Replace retaining nut.• Discard first pump.

Spreading the adhesive

• Pre-cut the reinforcement patch before you spread the adhesive.

• Apply tight coat of adhesive to repair area.

• Press reinforcement patch into adhesive.

• Spread additional adhesive into patch.

Insurance strip

• Cut a piece of the reinforcement patch and place it on the edge of the repair.

• Adds additional reinforcement along the edge of the bumper.

Cosmetic Repair

• Remove tape

• You can see the back side tied to the front side.

Sand Front Side Area

1. Sand area with grade 80 3M™ Imperial™ Hookit™ II Disc P.N. 00683.

2. Sand down the squeeze out.

3. Remove grade 80 scratches with grade 180 3M™ Imperial™ Hookit™ II Disc P.N. 00679.

4. Blow off the repair area.

5. Use Adhesion promoter , let sit for 5 minutes,

Equalizing The Cartridge• Do not remove metal clip.• Unscrew cap.• Insert cartridge into MixPac® Applicator• Eject material so that both A & B are

mixing equally. Wipe clean.• Attach static mix nozzel.• Replace retaining nut.• Discard first pump.

Using 3M™ Automix™ EZ Sand Flexible Parts Repair P.N. 05887

• Apply tight coat by forcing the adhesive into the repair area.

• Continue building up the adhesive just slightly higher than the bumper.

• Spread from paint to paint

Checking To See If The Material Has Cured

• Wait 15 minutes

• Nick in middle of repair with your fingernail to see a white mark – Then you know the adhesive has cured properly.

Sanding 3M™ Automix™ EZ Sand Flexible Parts Repair P.N. 05887

• Sand filler material with grade 80 3M™ Imperial™ Hookit™ II Disc P.N. 00683.

• Remove grade 80 scratches with grade 180 3M™ Imperial™ Hookit™ II Disc P.N. 00679.

• Feather well into the clear with grade 320 3M™ Imperial™ Hookit™ II Disc P.N. 00675.

Finishing The Job

• Blow repair area clean.

• Apply 3M™ Polyolefin Adhesion Promoter P.N. 05907.

• Ready for priming & painting.