Polyurea materials are widely used in various fields, but are not suitable for environments with extremely strong acid and alkali corrosion or strong solvents. Generally, polyurea can be used in weakly acidic and weakly alkaline inorganic environments, and the choice of polyurea should be based on the application environment. When applying under different temperature and humidity conditions, different interface agents and primers need to be selected and matched to ensure good adhesion between the surface layer and the substrate. Different types of polyurea materials and matching primers should be scientifically analyzed and selected for different application environments.
The primer plays a crucial role as an adhesive between the substrate and the polyurea coating. It not only seals the substrate surface, preventing blistering and peeling, but also acts as a transition layer, improving the bonding strength between the polyurea coating and the substrate, and enhancing interlayer adhesion. Changes in the on-site construction environment, mainly temperature and relative humidity, can greatly affect the quality of primer application, thus affecting the overall project quality.
Primers are divided into metallic primers and concrete primers. Steel is a metal, so a metallic primer is selected.
A special polyurea treatment agent is an active two-component treatment agent. This product exhibits strong adhesion not only to concrete but also to sprayed polyurea elastomers. It is a specialized primer for polyurethane products in the field of substrate protection. It can also be used for the treatment of substrates such as asphalt-based bridge waterproof coatings.
Basic treatment of both metallic and non-metallic materials.
The primer can be applied by spraying or brushing. When applying, repeatedly pull or rub the surface to be coated to help the paint fully wet the surface and enhance the adhesion of the paint film. At the same time, carefully check to ensure no areas are missed.
