Question: what is the difference between 1k and 2k primer?
Answer: 1K paint is less hard-wearing than the 2K alternative. ... 1K paints typically dry's faster than 2K paints. 2K means an activator is required to dry/cure, sometimes referred to as a hardener. Once the hardener has been activated, you have up to 8 hours to apply the contents before the can becomes unusable.