CRR Blog

What’s Your Epoxy Primer Knowledge?

WHEN SHOULD EPOXY PRIMERS BE USED TO ENSURE A SAFE, HIGH-QUALITY REPAIR?

Epoxy primers serve an important role in the repair shop by helping to prevent corrosion and promote bonding of different materials. Test your knowledge to see when, where and how epoxy primers should be used.

SHOULD EPOXY PRIMERS BE APPLIED BEFORE BODY FILLERS?Article_EpoxyPrimerKnowledge_callout_images

The recommended approach to applying body filler is to apply epoxy primer to the metal first, and then apply the body filler. Exposed metal is susceptible to rust over time—an epoxy primer can help prevent this by sealing the metal and protecting it from corrosion. In certain cases, direct-to-metal urethane primer is an acceptable way to treat the metal in place of an epoxy primer.

In addition, some body fillers have chemicals in them that may react with moisture or other environmental factors to create rust, making any metal the filler comes into contact with even more vulnerable to corrosion if no epoxy primer is used.

CAN EPOXY PRIMER PREVENT REPAIR MAPPING?

Repair mapping is an artifact of collision work that can sometimes show up long after the job has been completed. It is caused by the materials used in the repair seeping into the edges of the painted border surrounding the sanded repair area. The result is that the edge of the painted border begins to appear as a raised pattern through the finished paint surface. Using epoxy primer can help prevent repair mapping by sealing the area and inhibiting seepage.

Furthermore, epoxy primers provide a good base for the application of other paint products, helping them to adhere to each other better.

WHAT IS THE PROPER APPLICATION OF EPOXY PRIMERS?

Epoxy primer is simple to use and apply. Mix per the ratio specified in the manufacturer’s requirements. Once it is mixed, it can be applied using a spray gun, via aerosol and even by being rolled or brushed on. Always perform your body repairs with epoxy primer in mind.