Epoxy primer is a sealer that produces a good surface finish on applied top coats. A two-part epoxy primer contains zinc phosphate, which acts as corrosion-inhibiting pigment. Epoxy primers can be used to waterproof materials that consequently protect the bare metal from oxidation. A dry, very clean surface is needed before applying epoxy primer. Two-part epoxy primer needs to be mixed thoroughly before applying.
Since paints in the automobile and marine industries are very important for resisting corrosion (rusting), epoxy coatings are widely used as primers to improve the adhesion of the metal surface. Epoxy primers are also used in structural steel coatings for high-build thickness with the application of only one or two coats.
A two-part epoxy primer is known as structural steel primer. It needs two components that are cured chemically through cross-linking. This two-part epoxy primer produces a film that is resistant to abrasion, chemicals and moisture. It is very suitable for use on properly prepared steel and concrete. This primer is also recommended for power plants, marine applications, water treatment plants and tank exteriors.
Further advantages of this primer include:
- Water resistance
- Corrosion inhibiting
- Excellent adhesion