Nason® SelectPrime™ 421-19™ 2K Urethane Primer
Nason® SelectPrime™ 421-19™ 2K Urethane Primer

A gray, 2K urethane primer-filler designed to maximize DOI while providing high build and an exceptional free sanding film without shrinkage or sand scratch swelling.

  • Gray in color
  • Maximizes DOI
  • High build

Product Details

Type Primer
Technology Urethane
Substrates Properly treated bare fiberglass, steel and aluminum
Thoroughly sanded, painted surfaces
VOC Please refer to VOC Compliance Charts
Available Sizes
Size Case Qty UPC GMC
Quart 6 012500384320 1250038432
Gallon 4 012500384313 1250038431

Mixing Instructions

Components Parts by Volume
421-19™ 4
483-87™ 1
28-32 seconds in a Zahn #2 cup
Pot Life
1 hour at 70°F

Application Instructions

Apply 2-4 medium-wet coats until desired film build is achieved. Flash 5-10 minutes between coats.
Gun Setup & Air Pressure
Refer to technical data sheet

Dry Time

Air Dry Force Dry
Air dry: 2 hours at 70°F Force dry: 30 minutes at 140°F
Coverage (Ft2)
Dry Film Thickness (mil)

Special Instructions


Refer to the product Technical Data Sheet for complete directions for use. Refer to the product Material Safety Data Sheet for safety information.

Packaging Information

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