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The biggest difference between 2K primer and ordinary one-component primer is that it requires the participation of a hardener. The role of the hardener is to cure the primer and form a solid coating through a chemical reaction. Specifically, the reasons why 2K primer needs a hardener are as follows: 1. Improve hardness and durability 2. Accelerate the curing process 3. Enhance adhesion

For minor scratches and small-area peeling, 1K primer is easy to use and can be repaired quickly.For car owners with limited budgets, 1K primer is an economical choice. For high-demand full-car spraying projects, 2K primer provides more ideal durability and anti-corrosion performance.