Synergy Wood is the leading innovator of prefinished wood ceilings and walls - inlcuding our reclaimed wood look rustic wood walls.



White Powder (Calcium Sulfate) on Cypress Wood

Noticing a white powder on your Cypress? Caring for your Synergy Wood prefinished wood ceiling or walls - If you see white powder, it is calcium sulfate and can be treated with CLR


Our research shows that the white powder comes from inside the cypress wood, normally through knots, splits or checks in the wood. This white powder is calcium sulfate and comes from the kiln drying process used by mills that utilize boilers as a heat source. During the drying process, the calcium sulfate forms on the inside of the pipes as scale and due to the heat and moisture, is suspended in the heated air of the kiln and settles onto (and into) the wood. The wood itself, being mostly wet at that stage, has open pores where the calcium sulfate laden air settles. We know it is not present in all boards and is not visible to us during our finishing process.


This naturally occurring issue has presented itself on exterior porch applications. Because the calcium sulfate is hygroscopic, when condensation forms on the boards in the mornings or after a rain has passed, it migrates out through the knots, splits and checks found in cypress via the condensation.


If you are experiencing "white powder" on your Synergy Wood Cypress porch ceiling, use this form for a White Powder Cleaner Kit.

How to use the White Powder Cleaner Kit:

Use provided face shield during the application and removal of the DeScale 433 soultion.

Spray affected area until saturated. Let sit on surface for five (5) minutes. Wipe off affected area with a clean, damp cloth. Rinse cloth as needed. Repeat as needed.

More than one application may be required to treat heavily affected areas. Over time - and with treatnent, the white powder will stop migrating out.

Dowload the NuFlo DeScale 433 MSDS 



For any other information you might need, please call 866-791-6714 or email us.


All of our products are 100% real, sustainable wood and American made at our plant in Sanford, Florida. Located just a few minutes from Downtown Orlando, Our showroom is open to visitors Monday through Friday from 8am - 4pm by appointment. Can't make it to our showroom? Order samples today.


3031 S Mellonville Ave                   866.791.6714

Sanford, Florida 32773        



© 2022 Synergy Wood®. All Rights Reserved. Synergy Wood®, E-Peck® and the "S" logo mark are all registered trade marks of Synergy Wood Products, Inc.



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