Ok To Paint Galvanized Sheet Metal

Bituminous latex acrylic and vinyl paints tend to adhere well to galvanized metals.

Ok to paint galvanized sheet metal.

On older galvanized metal surfaces where the zinc coating has begun breaking down known as white rust use a wire brush or fine sandpaper to remove the chalky film before cleaning it. Here s how to paint galvanized metal. Rinse the metal and let it dry completely for several hours. New galvanized metal a product used to make corrugated sheets gutters and downspouts is usually smooth and is coated with either a layer of oil to prevent white rust or is passivated.

If you ve ever tried to paint a galvanized metal surface you know that it doesn t work all that well. To prep metal for paint adhesion you must first. Start by cleaning the steel thoroughly with a chemical degreaser. Wipe the galvanized surface down with white vinegar.

Before you jump right into it it s critical to prep the nonstick surface so it can hold paint. Paint applied over this oily surface or clear passivator will peel quickly. You can use a dedicated galvanised metal paint or you can use a suitable primer. Tips for painting galvanized metal before painting galvanized metal such as drip strips around eaves or roof flashing take the following steps so the paint will adhere properly and not peel.

The truth is that paint will not adhere to galvanized steel. Rinse the metal with a weak solution of water and ammonia and allow it to dry. Apply a rust proof primer to the galvanized metal with a paint brush. Once the metal has been cleaned and is dry prime it using an exterior multipurpose latex primer or a latex primer that is made specifically for galvanized metal.

Allow the primer to dry completely. Use a primer designed for use on metals. The layer of zinc left on the metal after the galvanization process is meant to reduce corrosion but it also rejects paint eventually causing it to peel or shed. Due to its slick smooth surface metal can be challenging to paint and that can you ve got sitting around in the garage probably won t cut it.

Because of its smooth slick zinc coated finish galvanized steel can be tricky to paint. Apply a second coat. When painting galvanised steel you have to be aware that some primers and metal paints are not suitable.