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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

As a frequently used means of transportation, the surface of a car needs to withstand greater external impact and wear, and the hard coating film formed by 2K paint through chemical curing reaction can fully meet this requirement.

For metal materials, the use of primer is usually necessary. Metal surfaces are usually smooth and easily corroded by air and moisture. Directly applying 2K acrylic paint may result in insufficient adhesion and easy rust.

2K car paint can be either oily or watery, and the specific type depends on the composition and formulation of the paint base. Traditionally, 2K car paint usually adopts oily formula, but with the improvement of environmental awareness, water-based 2K car paint has gradually attracted attention.

In theory, it is feasible to spray 2K car paint on 1K car paint. 2K paint has strong adhesion and can cover 1K paint to form a strong paint film. Before spraying 2K paint, make sure that the 1K paint has been completely cured, otherwise it may cause the paint film to be unstable or fall off.

2K paint requires specific environmental conditions during the drying and curing process. If the temperature is too low or too high, and the humidity is too high or too low, it will affect the curing effect of the paint and may cause the paint film to crack.