Question: is wd40 ok to use on rubber?
Answer: 2 Answers. WD-40 has 1000's of uses!! ... WD40 is just a penetrating oil spray - it's not a caustic rust remover or some aggressive chemical. Just a "water displacing" (WD) oil spray and its generally pretty safe (safe for paint, chrome, rubber, glass, body plastics - most materials cars are made out of).