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My 20+ year old siding can get pretty moldy and grimy in one year. I wondering if waxing it, after I clean it, would help reduce the mold and dirt accumulation and give it new life. I see car waxes that say they can be used for waxing vinyl siding.

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I would say the biggest advantage is if you have a tournament coming up against the Cobra Kai. – DMoore Aug 8 '13 at 14:59
LOL. Ok, maybe a spray type wash and wax formula, not a paste wax. – ddm Aug 8 '13 at 17:15
Waxing usually has to be done less often then shaving. – Tester101 Aug 9 '13 at 20:09

Yes, We use a cleaner/Wax, with a polyurethane base. / formulated from concentrate. We venture the material from the container through our power washer, using a wax/cleaner nozzle in our wand. its usually a one step cleaning, and the poly base fills the tiny pits in the siding caused by exposure to the elements. your finish is smoothened with a poly-glow effect. This protection prevents mold/as the surface is sealed. houses in worse than normal condition, gets 2 applications. After treatment, the finish is much like a newly waxed vehicle, and the water beads, and runs off, with a dry shine. usually after proper application, it only needs spraying with garden hose to refresh luster. Every 3-5 years, you can expect to re-apply.

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