Research Bulletin 2000-5: Refinishing Plastic Parts

Research Bulletin 2000-5
Refinishing Plastic Parts:DuPont

Plas-Stick^™ Plastic Prep 2319S

Desciption

Plastic-Prep 2319S is a ready-to-use unprimed plastic parts cleaner designed to remove mold release agents and other surface contaminants and eliminate static. 2319S is a critical step in the success of the plastic repair procedure.

General Information

Components: 2319S Plas-Stick Plastic-Prep

Mix Ratio/Viscosity: Ready to use.

Application

Substrates

For use on all automotive unstained plastics including rigid, semi-rigid, flexible, fiberglass parts, and primed or OEM parts with cut-throughs.

Application Steps

Clean surface with mild detergent and hot water.
Soak a clean cloth with 2319S and wipe surface to loosen and lift contaminants. Then wipe thoroughly with a clean dry cloth.
Sand thoroughly with P500 - P600 grit paper or with a gray scuff pad.
Re-apply 2319S to remove sanding sludge and to eliminate static.
Use Plas-Stick^TM Adhesion Promoter for Plastics 2322S to improve adhesion over unprimed polyolefin plastic.
Apply the recommended Plas-Stick^TM refinishing system for the plastic type you are working with. See Automotive Plastics Refinishing Guide.

Tips for Success

To test the surface preparation, pour a cap of 2319S on the prepared area. 2319S will sheet cleanly over a clean substrate. If 2319S beads up, the surface is not clean.
For difficult-to-clean and textured plastics, temper the substrate for 30 minutes at 140° F after cleaning and sanding (if applicable). This may be helpful in driving out further mold release agents.Do not sand after tempering. Reapply 2319S after tempering.
Use a clean cloth for applying and wiping 2319S.
If the part is pre-primed, try to avoid cut-throughs. If cut-throughs occur, complete the surface prep procedure and follow the recommended Plas-Stick^TM refinishing system designated for the unprimed plastic substrate you are working with.
Refer to Automotive Plastics Refinishing Guide for complete system repair procedures.

Note:
Tempering is not beneficial for urethane parts (PUR) due to "post cure" temperatures In excess of 140° F

Caution:
Do not use solvent-based cleaners on unprimed plastic or fiberglass (i. e., 3900S, 3901S, 3919S, 3939S) due to static buildup and the potential for flash fire.

Physical Properties

VOC: 5.5 lbs./gal ready to use (6.6 lbs./gal less water and exempt solvents).

Flash Point: See MSDS

VOC Regulated Areas

These directions refer to the use of products which may be restricted or require special mixing instructions in VOC regulated areas. Follow mixing and usage recommendations in the VOC Compliant Products Chart for your area.

Safety and Handling

Before using any DuPont product, be sure to read all safety directions and warnings. WEAR A PROPERLY FITTED VAPOR/PARTICULATE RESPIRATOR approved by NIOSH for use with paints (TC-23C), eye protection, gloves and protective clothing during application and until all vapors and spray mists are exhausted. In confined spaces, or in situations where continuous spray operations are typical, or if proper respirator fit is not possible, wear a positive pressure, supplied-air respirator (NIOSH TC-19C). In all cases, follow respirator manufacturer's directions for respirator use. Do not permit anyone without protection in the painting area. This product is intended for industrial use only by professional, trained painters.