The most durable in the Perma-Chink line of exterior stain products. This product was tested in extreme conditions and what came about was a state of the art resin, UV protection to match or surpass most any on the market, a breathable film, mildew resistant, we could go on and on. Put a coat of advanced topcoat (satin or gloss) on top of Ultra-7 and you can have an eco-friendly, #1 quality, warranty backed stain project. MADE IN THE USA.