(Below) Paint job that was done without properly removing mill glaze.


(Above) Difference between painting over mill glaze and properly priming the wood before painting.

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What is Mill Glaze?

Mill glaze is a byproduct of the way certain types of wood have been processed. It gives wood siding an undesirably hard, slick surface. The condition seems to be the result of the planning process, where heat is produced and causes the wood to seep resins out onto its surface. This affects the way paint interacts with the siding.

The MasterCraft Response

What does this mean when you want to paint wood siding that has produced mill glaze? If paint is applied to this kind of slick, varnish-like condition, the paint will not adhere to the wood completely. You'll end up with parts of the color missing, the paint having failed to seep into the textures of the wood due to the glaze. 


At MasterCraft, you can be confident that we are mindful of mill glaze as a potential obstacle, and we are equipped to take the appropriate steps to remedy the situation. We ensure a high-quality paint job on any type of siding, with specialists to tackle tricky wood surfaces troubled by mill glaze. Our technicians are trained to identify where there may be an issue, and then to sand and roughen the surface of the wood as a pre-paint treatment to promote complete color adhesion. 


As with mill glaze, rust is sometimes an issue on certain types of siding. We never cut corners or simply paint over these issues. Prior to priming, all mill glaze and other surface contaminants are removed with professional technique.  We prepare your siding thoroughly, with integrity and honesty, to provide a high-quality, long-lasting paint job.


Please feel free to open a dialogue and voice questions and concerns you may have about the surface (or other aspects) of your siding. We are confident in our skills and applications. This makes us happy to educate and/or explain any parts of the process to our clients who've made the MasterCraft investment.