I've used it for years on my tires and never had any problems. I now use Amourall extreme tire shine Gel. Has a nice applicator so your hands don't get greasy. I know places like Discount tire say no to it. But I only use it 4-5 times a year. Living in Oregon we only have a 1/2 a year where your truck stays clean for a few weeks at a time. If I lived in AZ or FL I suppose I would be using it more often and then I may se some issues. But 4-5 times a year I really doubt it matters. I don't even use it every wash maybe every 3rd in the summer and rarely in the fall or spring. Moderation is the key.