Everything You Need to Know About Using Metal Sealant for Painted Metal

A sprayed sealant.

A metal sealant can help protect metal products and surfaces from corrosion, scratches, effects of UV light, and other wear and tear. There are different types of sealants with have different formulations to work effectively on various types of metal surfaces. Sealants are mostly clear, but some have stains in different colors. They are applied on painted metal surfaces through spraying or brushing.


Metal sealants contain ingredients which make them bond to different types of metal surfaces. They are also designed to work well with different types of metal such as aluminum, steel, copper, or zinc.

It is important to buy a metal sealant that bonds with painted metal surfaces. This is usually indicated under performance properties of the particular sealant. Check the quality that falls under adhesion and find out how it rates. This is a good indicator of how the particular adhesive will bond with painted metal.

Properties of Metal Sealant for Painted Metal

Quality metal sealant for painted metal is formulated to withstand extreme weather conditions and is UV-resistant. This makes it the ideal choice for exterior applications. The sealant should be able to expand and contract with the change of weather and temperature without cracking or peeling. Most of all, however, the sealant should provide excellent adhesion on painted metals.

Benefits of Using Metal Sealant for Painted Metal

The advantages associated with using metal sealant with formulations suited for painted metal is that they do not become brittle and crack over time. They are easy to apply as a technician can work on the surface and move onto the next step quickly without having to wait for long periods. The reason is that they are fast drying and have a fast paint time. They also remain flexible over time.

This type of sealant does not require special equipment to dispense it to the surface of the painted metal. It can be applied with a sprayer or brush.

How to Use Metal Sealants for Painted Metals

The surface should be well prepared before applying the sealant. Remove peelings from paint, rust, elements of corrosion, dirt, oil, or grease. It is recommended that you apply the sealant over a primer to enhance its resistance to corrosion and rust.

Manufacturer's Instructions

As metal sealants are formulated differently, it is important to observe some of the recommendations given by the manufacturer. Take into account the application and service temperature. This allows the sealant to bond properly.


Store metal sealants at room temperature. To avoid irritation, apply sealant in well-ventilated areas. Wear gas masks and protective clothing to prevent injuries.