1K is a term used to describe a coating that does not require a hardener, catalyst or activator. This term can be used to describe “single component” paints that dry or cure on their own (such as lacquer, enamel or auto touch-up spray can paints.
2K paints on the other hand describes a coating that needs to be mixed with hardener before being used or applied.
A 1K hardens on its own, is less susceptible to damage from chemicals, moisture, or UV rays, and is quicker to apply because drying time is faster. It also does not require extra efforts or mixture to apply as compared to 2K.
In the end, 2K is more durable and is used especially for topcoat. With our convenient spray can system, buying the paint is not a problem. But with Samurai 2K Aerosol System, you can paint it like a pro.