How long should the mixed epoxy primer induct?

How long should the mixed epoxy primer induct?

• A. 5 min
• B. 10 min
• C. 30 min
• D. 60 min

Answer: (C)

When you mix epoxy primer, you enter a limited working period called the pot life (induction time). This is how long the blended product stays workable enough to apply before it starts to cure and thicken. For many epoxy primers, that window is about 30 minutes at typical shop temperatures, which is why 30 minutes is the best answer. If you wait longer, the mixture becomes too viscous and may not spray or brush on smoothly, and it can affect adhesion and film formation. Temperature changes affect this window: hotter conditions shorten it, cooler conditions can extend it a bit but not beyond the product’s specification. Other times like 5–10 minutes are too short for practical application, and 60 minutes is longer than the usual pot life for standard primers, hence 30 minutes is the appropriate choice.

When you mix epoxy primer, you enter a limited working period called the pot life (induction time). This is how long the blended product stays workable enough to apply before it starts to cure and thicken. For many epoxy primers, that window is about 30 minutes at typical shop temperatures, which is why 30 minutes is the best answer. If you wait longer, the mixture becomes too viscous and may not spray or brush on smoothly, and it can affect adhesion and film formation. Temperature changes affect this window: hotter conditions shorten it, cooler conditions can extend it a bit but not beyond the product’s specification. Other times like 5–10 minutes are too short for practical application, and 60 minutes is longer than the usual pot life for standard primers, hence 30 minutes is the appropriate choice.