Corothane I GalvaPac

1k Zinc Primer | Sherwin-Williams


Corothane I GalvaPac 1k Zinc Primer

Product Description:

Corothane I GalvaPac 1k Zinc Primer is a moisture curing urethane zinc-rich primer. Designed for low-temperature application to steel surfaces.


  • Low temperature application - down to 20°F (-7°C)
  • NSF approved to Standard 61 for potable water
  • Abrasion and chemical resistant
  • Easy to apply and recoat
  • Usable for immersion service with recommended topcoated
  • Resistant to mudcracking
  • Meets Class B requirements for Slip Coeffi cient and Creep Re- sistance, .54
  • Enhanced coating strength and edge protection with micaceous iron oxide addition


Finish: Flat

Color: Gray and Red

Volume Solids: 67% ± 2%

Weight Solids: 91.7% ± 2%

VOC (calculated):
<300 g/L ; 2.5 lb/gal (unreduced)
<340 g/L ; 2.8 lb/gal (reduced 10%)

Zinc Content in Dry Film: 85% by weight


Recommended Spreading Rate per coat:
  Standard AWWA
  Minimum Maximum Minimum Maximum
Wet mils (microns) 4.5 (112) 6.8 (170) 3.0 (75) 6.0 (150)
Dry mils (microns) 3.0 (75) 4.0 (100) 2.0 (50) 4.0* (100*)
~Coverage sq ft/gal (sq m/L) 268 (6.5) 358 (8.8) 268 (6.5) 536 (13.1)
Theoretical coverage sq ft/gal (sq m/L)
@ 1 mil/25 micron dft
  1072 (26.2)    

NOTE: Brush or roll application may require multiple coats to achieve maximum fi lm thickness and uniformity of appearance. *See Recommended Systems on reverse side

Recommended Uses:

  • Immersion Service - potable water: Meets NSF Standard 61for use in potable water storage.
    • 250,000 gallon untopcoated
    • 20,000 gallon minimum topcoated
  • Meets requirements of SSPC Paint Spec No. 40, Type I and Type II, for zinc rich moisture cure urethane primer
  • Meets requirements of SSPC Paint 20, Level 1
  • As a primer in a urethane coating system for bridges, tanks, chemical, and marine structures
  • Ideal for priming water assisted abrasive blasted surfaces where fl ash rusting or blooming limits the use of conventional zinc rich coatings
  • Acceptable for use with cathodic protection with select topcoats
  • Conforms to AWWA D102 Inside Coating System #3 (ICS-3), Inside Coating System #5 (ICS-5), Inside Coating System #6 (ICS-6), Outside Coating System #2 (OCS-2), Outside Coating System #3 (OCS-3), Outside Coating System #4 (OCS-4), and Outside Coating System #6 (OCS-6)
  • A component of INFINITANK

*Note: For complete product information, please refer to


Contact an Expert

Please enter a value
Please enter a value
Please select
Your email address is required
Please enter a value
Please enter a value

Custom Equipment

Recommended Products

Brochure Download

Wastewater / Water Industry Brochure: Sherwin-Williams and Graco

Download our Wastewater / Water Industry Brochure and see how Graco equipment matches-up with Sherwin-Williams coatings

Have Questions? Let's Talk.

Contact an Expert

Contact an Expert

We'll help you choose the right product for your job.

Tech Support

Tech Support

7:30 a.m.-5 p.m. Central Time

Email Support

Email Support