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January 2 - January 12, 2014

What is the difference between a damp-surface tolerant and a wet-surface tolerant paint? How can we determine when a surface is damp or wet?

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Selected Answers

From FRIDAY OWAJI of DELATTRE BEZONS on January 11, 2014:
The quantity of water is the difference between them.

From Louis Vincent of L.D. "LOU" VINCENT PHD LLC on January 7, 2014:
A wet surface has visible moisture on the surface.  A damp surface can have moisture permeated into the surface, but it has not collected to the point that it is visible to the naked eye. Primers for damp surfaces have the ability to take up the surface condensation into the interstices of the coating film and still allow it to cure, but the cure time will be longer than on a dry surface. Primers for both damp and wet surfaces work better if the first coat is either brushed or rolled. The physical action of the brush or roller helps to incorporate moisture into the primer  so that it can be kicked out as part of the curing process.

From Warren Brand of Chicago Coatings Group on January 6, 2014:
I would say the answer would depend on the definition of the product you're trying to apply. When I think of a wet surface, I think of one that has standing water on it.

From PARVEZ SHAIKH of SANDVIK ASIA PVT. LTD. on January 6, 2014:
 When you run your hand over the surface, if it's wet, your hand  is wetted by the moisture.  In damp conditions,  you can feel the moisture with your hand, but your hand doesn't get wet.

From Amaresh Singh of Chevron on January 6, 2014:
A damp surface has less than moisture than a wet surface.

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Tagged categories: Protective coatings


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