20-75 Primers
A. Non-chromate Primers
Corlar 13580S* Desoprime CA7502* Desoprime CA7422*
Manufacturer Axalta PPG PPG
Base
Corlar 13580S
Epoxy Primer
CA7502A CA7422A
Activator
Corlar 13180S
Epoxy Activator
CA7502B CA7422B
Reducer
13756S VOC-Exempt
Reducer
CA7502C CA7422C
Base: Activator: Reducer 4:1:1 4:4:1 4:4:1
Viscosity 17-21 sec in Zahn #2 15-19 sec in Zahn #2 15-19 sec in Zahn #2
Induction time 30 minutes
2 hours at 55–70°F
1 hour at 71–80°F
30 minutes > 70°F
2 hours at 55–68°F
1 hour at 69–95°F
Pot life
8 hours at 70°F 4 hours at 70°F 4 hours at 70°F
Flash off time None 30 minutes 30 minutes
Dry time
2 hours at 70°F
1 hour at 130°F
3 hours at 70°F
30 minutes at 120°F
3 hours at 70°F
30 minutes at 120°F
Recoat window 48 hours 48 hours 48 hours
* Shelf life per manufacturer's recommendation.
B. Chromate Primers
44GN007* 10P20-44*
Manufacturer PPG AkzoNobel
Base 44GN007 10P20-44
Activator 44GN007CAT EC-265 or EC-273
Reducer Distilled or deionized water TR-114 or TR-102
Base: Activator: Reducer 3:1:8 3:1:1
Viscosity 18–22 seconds in Zahn #2 13–19 seconds in Zahn #2
Induction time None None
Pot life
4 hours at 70°F 4 hours at 77°F
Flash off time 15 minutes 30 minutes
Dry time
2 hours at 70°F
45 minutes at 120°F
30 minutes at 140°F
Recoat window 24 hours 24 hours
* Shelf life per manufacturer's recommendation.
Page 20.18 Chapter 20 Standard Practices JUL 2020
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