Apple Guard! I found about about it on this forum. You can get it at leatherstuff.com. I just placed an order today for two of the 8 oz bottles of the conditioner, but I seriously debated whether I should have gotten the gallon jug! The shipping is reasonable, $5 flat Priority shipping, but I couldn't find a current coupon code...
Do a search before you post. Thats what the search function is for.
There are TONS of threads on this topic already.