exterior painting or staining over Wolman Raincoat (water base)


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Old 08-04-14, 11:58 AM
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exterior painting or staining over Wolman Raincoat (water base)

Hello -

A few months ago I had a new porch built. The contractor sealed the pressure-treated wood with Wolman Clear Raincoat (water-based formula)

WOLMAN™
RainCoat® Clear Water Repellent (Water Base)


At the time I called the manufacturer and asked if I would be able to paint later, and they said yes. But now, watching rain bead up on the surface, I'm having my doubts about paint taking. It's been about 4 months since the sealer was put on.

Does anyone have experience painting over a water-based wood sealer? Did you use water- or oil-based paint? What kind of primer? Did the paint take? How long had the sealer been down before you added paint?

Thank you!
 
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Old 08-04-14, 12:26 PM
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I wouldn't paint, I'd use a solid body stain instead. Paint peels and the maintenance to deal with it is more than with the stain.

If you do want to go with paint, I would use an oil based primer and latex paint purchased from a paint store, not a paint department.
 
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Old 08-04-14, 12:32 PM
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I don't know that I've ever used that particular coating or painted/stained over it but the fact that water beads up is an issue. Because it still repels water means it will also somewhat repel any coating you apply over it. Solvent based primers will adhere better than their latex counterpart. I would scrub the porch with TSP first to try and remove/dull the coating.

Is this the decking or just the stand up wood?
 
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Old 08-04-14, 12:52 PM
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Hi --

Thanks to you both for the reply.

1) You think that stain might go through the water seal better than paint? Because I could be open to stain instead if it meant not having to replace peeling paint a year later. Any advice about type of stain to look for?

2) Yes, it's the decking and stairs as well as the handrails - everything. And sorry, can you tell me what TSP is?

Thanks!
 
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Old 08-04-14, 12:59 PM
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TSP - tri sodium phosphate, basically a heavy duty detergent.

Stain won't adhere any better to the existing coating than anything else will [other than a solvent based primer] I'd do my best to remove as much of the coating as possible and then use a stain as paints will peel sooner or later making for more work both now and later TSP will clean the sealer and possibly remove some of it. A deck stripper would also be a good idea.

The handrails and posts are usually more forgiving than the decking.
 
 

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