IMHO
Any time you put a shine/sealer product on your tires, you are sealing/blocking the pours of the rubber to create the shine. Rubber tires must breath! Unless they are Goodrich T/A's or the like. Then who cares; as they are junk anyway.
I have yet to see a tire shine product that guarantee's no cracking!
Be smart! If you have
to use tire shine products. Don't leave these products on any longer than the show your going to! Remember, rubber tires are a nature based product & not ment to shine. Leave the shine to the chrome & paint!
