Originally posted by pete-tarmigan What product do you recommend?
For lens grips or tires? In both cases you need to clean the rubber first, and then apply a suitable lubricant to the rubber. You don't want to seal the rubber (so it shouldn't be shiny or glossy), just keep it from cracking and tearing when it is distorted. Damage from ozone or solvents can only be prevented by changing the chemistry of the rubber, so there is no way to fix it after the fact. Hand dishwashing soap and water for cleaning works well as long as you rinse it off afterwards, otherwise spray cleaners like Spray Nine if you just want to wipe off the dirt without rinsing. For tires, the foaming aerosol tire cleaners work well, as long as you wipe off the tires shortly after spraying them down. Most of them leave a brown oily film if you let the tires air dry. For trade shows, I was always working with new tires, so once they were clean I didn't have to do anything else. Mineral oil contains paraffin, so for older rubber I suggest rubbing mineral oil into the rubber and wiping off any excess. Mineral oil is used in many skin care products and should be available by itself from drugstores, although probably not in the quantity needed for a set of tires. For really bad cracking, you could brush on liquid rubber, which might be available in hardware stores, it does a great job on the sidewalls of old, worn out tires that are being retreaded. However, short of vulcanizing new rubber to old rubber, you can't replace missing pieces of rubber. Probably more than you ever wanted to know about restoring damaged rubber?