Spies Hecker Procedure
Bumper Cover Preparation PUR or PP1. Parts must be baked for 60 minutes at 140° F prior to cleaning.
2. Clean parts thoroughly with Priomat Plastic Reducer 8581 with a gray scuff pad.
3. Allow parts to dry until there is a dry, dull, matte look.
4. Allow parts to dry for 12 hours or bake for 45 minutes at 140° F.
Coating PUR (polyurethane) or PP (polypropylene) bumper covers
5. Apply 1 - 1-1/2 coats of Priomat Elastic Primer 3304. Allow to dry for 10-15 minutes.
6. Apply two 3 coats of Priomat Elastic Primer Filler 3305. The mix is 2 parts 3305 and 1 part 8581.
7. Allow to dry for 20 minutes.
8. Top coat with any Spies Hecker Top Coat.
Tips for elastic and top coat mixtures
1. Add 10% - 100% Permacron Elastic Additive 8573 to Series 257 or Permacron 2K Clear Coats depending on its flexibility.
2. Most plastic bumpers require 25% to 50% Elastic Additive 573.
3. Only add Permacron Elastic Additive 8573 to the basecoat (before adding the hardener and reducer).
4. If Permacron Elastic Additive 8573 is used, 10% Permacron MS Duraplus 8580 may be added to increase drying time.