From what seen using one tire shine here by my brother they look good but in the long term damages the rubber. In the case of my brother the product soften the rubber so much that tire looked like they were melting on the inside when i try to tire patch one. He had to replace all four tires. From then on he just soap and water and scrub the tire clean.
As with all products different manufactures use different chemicals so may a very good product out there that does not harm the rubber but at the cost tires of my truck I not going to experiment on them.
