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Eastwood Gray 4:1 Urethane Primer and Activator

Eastwood Gray 4:1 Urethane Primer and Activator

Item #13676ZP Gray Urethane Primer

2-component gray surfacer designed for overall jobs
  1. Quantity:
    Quantity: close
    Eastwood 2K Urethane Primer Gray- Gallon 4:1
    Item #50240ZP
    Only $75.99

    In stock

  2. Quantity:
    Quantity: close
    Eastwood 2K 4:1 Urethane Primer Activator Quart
    Item #50241ZP
    Only $33.99

    In stock

Both Primer and Catalyst are required for a 4:1 mix



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Eastwood Urethane primer is a two-component gray surfacer designed for overall jobs.

  • Mixes 4:1 with 50241ZP Activator
  • Fills well and builds quickly
  • Dries fast and easy to sand
  • Apply over epoxy primer, body filler, existing finishes
  • Approximate Coverage Per Gallon: 140 SQ FT
  • Maximum operating temperature: 150 Fahrenheit
  • Made in the USA

It fills well, sands easily and provides excellent color holdout for all top coats. Mixes 4:1 with 50241 ZP catalyst. May be applied over Eastwood Epoxy primers, old paint, & body fillers. Ideal for block sanding in 3-4 hrs after application. When primer is mixed 4:1 with activator it makes 5 spray-able quarts. Primer is VOC 4.8 lbs per gallon.

This product can not be shipped to California

More info...
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After shaking/stirring primer, thoroughly mix four parts 2K Urethane Primer Sur- facer with one part Urethane Primer Activator

To reduce film build, 4:1 mixture may be cut by up to 20% with a urethane-grade reducer or other appropriate solvent product. Doing this may also improve the flow and leveling of primer. Eastwood suggests using a Zero -VOC reducer to avoid potential compliance issues. Use caution in mixing materials as epoxy primer may begin to gel after approximately two hours (at 70 °F).

HVLP Gun: Fluid Tip 1.2-1.6 mm Spray Pressure 25-30 psi
Conventional Gravity: Fluid Tip 1.4-1.6 mm Spray Pressure 40-50 psi
Conventional Siphon: Fluid Tip: 1.4-1.8 mm Spray Pressure 40-50 psi

Eastwood 2K Urethane Primer Surfacer should be applied in two medium wet coats, with a 10-15 minute flash period between each (at 70 °F). Typically, two coats is enough to achieve the desired 2 mil. dry film thickness, though more material may be applied as needed.

Urethane Primer Surfacer may be topcoated after approximately 30 minutes, or up to 18 hours (at 70 °F with sufficient cross-ventilation), with no additional prep required. After 18 hour recoat window, primer MUST be sanded prior to topcoat application for adhesion purposes.

May be wet sanded after 2-3 hours, or block sanded (dry) after 3-4 hours.


Click here for product information sheet


Use in well ventilated area Always wear eye, skin and repiratory protection Consult MSDS and Product Data Sheet for specific saefty instructions


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Eastwood Offers Free Lifetime Technical Support

Click here for product SDS information

Attention California Residents - Proposition 65

Proposition 65 Warning WARNING - Cancer and Reproductive Harm -

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