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How To Paint Galvanized Metal Flashing
The paint over HDG steel corrosion protection system will protect this light rail station structure for generations to come. After the surface of the galvanized part has been cleaned and roughened to provide a profile the part is ready for painting.
Surface preparation is a critical factor in achieving good paint adhesion.
How to paint galvanized metal flashing. Use a wire brush to abrade the surface to promote paint adhesion. How to prepare zinc coated galvanized sheet metal for painting so that the primer and paint sticks. Find Galvanized steel roll flashing at Lowes today.
The two keys to surface preparation are cleaning and profiling the steel. Cover all areas you do not want painted with blue painters tape. When painting Galvanised steel you have to be aware that some primers and metal paints are not suitable.
You can also use oil-based alkyd paint but you need to first apply an undercoat of a galvanized metal primer such as Sherwin-Williams Pro Industrial Pro-Cryl Universal Acrylic Primer. Go over the metal with a wire brush to remove any oxidation. Use the metal putty knife to remove any peeling or loose paint from the surface of the aluminum flashing.
Wipe the galvanized surface down with white vinegar. Painting Metal Flashing. Paint can be applied by brushing or spraying onto the galvanized surface.
When applied within the recommended DFT range of 03-to-05 mils it cures rapidly to a resin finish that neutralizes zinc corrosion products and retards their formation. 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. You can use a dedicated Galvanised metal paint or yo.
Cleaning the steel surface with a brush. If these two things are done correctly a compatible paint system should have no problem adhering to the galvanized surface. One treatment for partially weathered galvanizing is a basic zinc chromate-vinyl butyral wash primer SSPC Paint No.
If it is new it is best to prime the flashing first with a Bonding Primer and then apply an exterior paint. If your flashing is old there shouldnt be any problem just using the house paint you used on the wood. I contacted two different paint stores and got two different answers to what type of paint to use.
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