RaysWay
Autopia Specialist
Last night while refilling all of my spray bottles I realized I reached a personal achievement.
I can`t remember the last time I went through an entire gallon of product, let alone an APC I use at 5:1 (6 gallons). Normally I end up giving away my used gallons to friends or family before I run out, but this stuff is awesome.
I`ll be heading home with a fresh gallon tonight
I remember switching to OPC when Dr. G replied to a question regarding damaging tires if using certain products or chemicals. OPC was formulated to be a safe on tires, and after researching into highly caustic APC`s....made the switch and haven`t looked back since.

I can`t remember the last time I went through an entire gallon of product, let alone an APC I use at 5:1 (6 gallons). Normally I end up giving away my used gallons to friends or family before I run out, but this stuff is awesome.
I`ll be heading home with a fresh gallon tonight

I remember switching to OPC when Dr. G replied to a question regarding damaging tires if using certain products or chemicals. OPC was formulated to be a safe on tires, and after researching into highly caustic APC`s....made the switch and haven`t looked back since.
This is a great technical subject you have brought up since tire can age prematurely and cause rubber to crack due to improper maintenance. Rubber used in tire is based on polymerizing isoprene which forms a polyunsaturated polymer. The unsaturation will react with ozone and breaks down causing cracking. As you said, tire manufacturers add ozone scavengers and UV blockers when they formulate tires to prevent UV and ozone degradation. As tire rotates, these protectants will come to surface continuously over the life of tire which is referred to as churning or blooming.
The browning of tire is due to the UV and ozone blockers on the surface. Solvent based tire dressings and aggressive cleaners will leach out ozone blockers and UV absorbers and bring them to the surface causing excessive browning as you mentioned, This will cause a reduction of these protectants in the tire which will cause premature aging and cracking of tire. This is why tire manufacturers recommend against solvent based dressings. Both Optimum Tire Shine and Opti-Bond Tire Gel are water based, contain ozone and UV blockers, and are free of any solvents. Power Clean also is a mild cleaner that does not cause leaching or premature aging of tires.