i use armor all. i just spray it on the sidewall where it foams and cleans the tires. tapos hayaan ko lang. it just says on the bottle to let it sit for about a few minutes before driving. napansin ko kasi nung napasobra yung lagay ko, parang sobrang dulas nung gulong at walang grip. yun ang delikado.
I've been using Rain Harry Tire black for as long as I can remember, learned it from my father... like a tradition.
Never had any problems with it...
It's just a matter of RIGHT applicator and application...
Rubberized foam is always a good one, may last you 4-5 times application...
Application? I like mine just a very thin layer, enough to give my tires a wet-look but never too much...
Rain Harry tire black is not flammable nor harmful to your tires... I remember from one Transport show s Mega trade hall, one of the guys tested it even on his face, I would'nt do that although it did not hurt his skin...