SEM 39221 Waterborne Flexible Primer Surfacer, Black, 1 Gallon

SEM 39221 Waterborne Flexible Primer Surfacer, Black, 1 Gallon

• SEM 39221 Waterborne Flexible Primer Surfacer is a black, water-based flexible surfacer supplied in a 1 gallon can for automotive bumper refinishing and similar plastic substrates. It provides flexibility, adhesion, and filling properties, and it is ready to spray with no mixing. This is a coating product, not a replacement part.
• Features:
  • Flexible, water-based primer surfacer designed for automotive bumper refinishing to help support adhesion and durability on plastics.
  • Works as a barrier coat to help prevent lifting, supporting more reliable refinishing over compatible prepared surfaces.
  • Excellent filling properties help hide minor surface defects before topcoat application.
  • Ready to spray with no mixing and do not thin, helping reduce steps during refinish preparation.
  • Designed for use on properly prepared substrates as a primer surfacer and is not a replacement part for another SKU.
• Specifications:
  • Manufacturer: SEM Products, Inc.
  • Part Number: 39221
  • MPN: 39221
  • UPC: 646786392214
  • Product Name: Waterborne Flexible Primer Surfacer
  • Product Type / Function: Water-based flexible primer surfacer
  • Color: Black
  • Size / Capacity: 1 gallon
  • Mixing: Ready to spray, do not thin
  • Suitable Substrates: Properly prepped OEM finishes, fully cured and prepped refinish material, properly prepped bare plastic, plastic repair materials, sanded polyester filler and glazing putties
  • Application Coats: Two medium wet coats
  • Flash Time: 5-10 minutes between coats
  • System Compatibility or Application: Primer surfacer designed for automotive bumper refinishing and compatible prepared plastic and refinish substrates; TPO plastics require an adhesion promoter
• The Waterborne Flexible Primer Surfacer can also be referred to as waterborne flexible primer, waterborne primer surfacer, plastic bumper primer, flexible primer surfacer, and black waterborne primer.

SEM Products, Inc. manufactures refinishing and repair materials for automotive and related industries, including coatings, adhesives, and surface preparation products. The brand supports professional repair workflows with documented product systems and technical resources.

Q: What is SEM 39221 intended to be used on?
A: It is designed for automotive bumper refinishing and similar applications on properly prepared plastics and compatible refinish substrates. for TPO plastics, use an adhesion promoter as noted in the technical data sheet.

Q: Do I need to mix or thin SEM 39221 before spraying?
A: No. It is ready to spray with no mixing, and the technical data sheet states do not thin the product.

Q: How many coats and what flash time should I plan for?
A: Apply two medium wet coats and allow 5-10 minutes flash time between coats, adjusting for humidity, air circulation, and temperature as needed.