Title: Good and Bad
Product review: I sealed cracks in my cedar siding with DAP polyurethane sealant and it holds up well but it has a major problem. The tube says its paintable so after a month of the sealant drying I started to paint. After priming and giving boards a finish coat, the sealant is causing a shading reaction in the paint. A year later I have primed again, with oil primer and another finish coat of acrylic latex. Only where there is Dap sealant underneath the paint does a shading difference show up again. It now seems after following all these attempts at fixing this problem the only idea I have is to replace the boards as this caulk really holds and trying to remove it will ruin rough texture finish on cedar. This Dap sealant is paintable but has altered noticeably the paint finsh enough to make it unacceptable. Going back to using acrylic sealants again where there were no paint finish problems.
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