Common reason for Yellowed Vinyl Siding

Okay, I have a customer who is swearing the product I’ve been selling for 15 years that has never done anything bad before, has now turned the vinyl siding yellow.

What are the common reasons vinyl siding turns yellow in certain spots?

P.S. The search function doesn’t work well when you have two words :- (

Probably the bleach, not your surfactant. It will react with some white vinyl that has poor UV inhibitors. Acid will re-whiten. OneRestore should do the trick.

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How do you apply onerestore? Spray? with cloth?

Pump or 12v sprayer would probably be best. Brush or cloth could disturb oxidation and create more work.

Dwell time, rinse?

Actually, they can just read the bottle. They have the OneRestore in stock, YAY, hope this works. Thanks Alex!

Thx Alex had this happen at my last company on the ceiling of a large porch and we couldn’t get it off even after the bleach and scrubbing. Bookmark!