OBIC Prime 1503S

Steel Primer Fast Cure

Typical Installations

Urethane primer for steel substrate surfaces

Product Highlights

OBIC Prime 1503S Steel Primer is a fast curing modified urethane primer which is formulated for excellent cure profile. Product highlights include:

  • Specifically formulated for excellent adhesion to OBIC system polyurea and polyurethanes.
  • VOC compliant, fast cure urethane steel primer
  • Excellent adhesion to properly prepared steel substrates for long service life in harsh conditions.
  • May be applied by brush or airless sprayer
  • Produced in an ISO 9001-2015 certified facility

Application Properties

Property Value
Mix Ratio, by volume A to B 1:2
Solids, by volume 25%
Solids, by weight 48%
VOC’s lbs./mixed Gallon 2.8
Recommended Thickness 0.5-1.5 mils dft
Application Rate, WFT 5-10 mills
Coverage Per Gallon, sq. ft 1600+
Application Temp 30-100ºF

Physical Properties

Property Value
Cure to Touch @ 70 ºF 5 Minutes
Pot Life @ 70 ºF 2 hours
Recoat window @ 70 ºF Within 5-120 minutes

Equipment Recommendations

A Side Hose Temp 150-165 F
B Side Hose Temp 150-165 F
Pump PMC PHX 40 or HXP2
Spray Pressure 2200 PSI (Dynamic)

Values obtained in laboratory setting with spray apply film for comparison purposes only and should not be considered specifications.

Surface Preparation

Surface must be clean, dry and in sound condition. Remove all oil, dust, grease, dirt, loose rust and other foreign material to ensure adequate adhesion. See the OBIC 1503S Technical Data Sheet for minimum surface preparation requirements.


Read and review entire SDS for OBIC Prime 1503S prior to use.

Packaging, Storage & Shelf Life

OBIC Prime 1503S is available in 3 and 15-gallon kits. It should be stored in sealed containers between 60ºF and 90ºF. Shelf life is 12 months under normal conditions in factory sealed kits.