Plastic Repairs With Epoxy (3M)

Plastic repairs with epoxy (3M)

General about plastic repairs with epoxy (3M)
Carry out plastic repairs in the paint shop where the ventilation is good.
Carry out a sanding test with a machine to find out which are hard and which are soft plastics.
System I the plastic softens or becomes sticky (soft plastic).
System II the plastic gives off dust (hard plastic).

System I




always start by heating the plastic to at least 40°C (104°F) to remove chemical substances which otherwise affect the end result.
If necessary align the damage first.

Clean the surface
Clean the surface with soap and water. Dry or blow dry.
Then clean with 3M 8884 E adhesive remover to remove grease, oil, tar, silicon etc.

Note! Isopropyl alcohol or similar is used for ABS plastics.

Sand surface




Sand the surface on the front and reverse so that the bodywork will adhere. If the damage has gone through bevel the edges to V shape
Scratches are only filled.

Blow clean and dry off the surface
Blow clean and dry off the surface.
Then spray a thin coat of 3M 5907 PAP and allow to dry.
If necessary secure the damaged area using a soldering iron or bonding adhesive.

Tape the damage




Tape the front side of the damage with 3M 6945 masking tape
Use 3M 5900 or 3M 5895 Flexibel Part Repair Material. Mix parts A and B equally, to an even color.
Application should be carried out within 5-6 minutes.
Alternatively the reinforcement material of fiberglass weave, aluminum or plastic can be used. If plastic is used the plastic should be the same type as the damaged material.

Fix the damaged area
Wet the surface with a thin layer of 3M 5900 using a putty knife. If the damage has gone through the bodywork plastic should be pressed against the masking tape.
if necessary reinforce by laying 2 to 4 layers of fiberglass weave (close knit) crosswise
Allow to cure for 20-30 minutes at room temperature (20°C (68°F)).
After curing remove masking tape on the front.

Fine sand the area
Sand the area with P180 sandpaper.
If there are pores or sanding scratches first spray a thin layer of 3M 5907 PAP and allow to dry.
Then fill with a thin layer of 3M 5903.
Fine sand with P 600 sandpaper.
Spray a thin layer of 3M 5907 PAP and allow to dry.
Then spray a mist coat and two spray coats of 3M 5906 Flexibel Parts Coating over the repair area and the surrounding area.
Allow to dry approximately 30 minutes.
If necessary sand lightly with Scotch-Brite finark gray 7448 or 3M 622 Frecut P500.