Ta for info. I am a bit frustrated with the brakes. Everything else has been straightforward. It will erk me to pay for new calipers.I googled is WD40 bad for rubber.
Interesting to note that there are quite a few materials that are commonly known as rubber.
A perennial question for those of us who like to clean our chains with WD40 is: does WD40 do damage to the rubber o-ring? Ive heard enough guys say Ive been cleaning my o-ring chains with WD40 since 1815 and Ive never had a problem (or something to that effect) that Ive just gone ahead and used W...thumpertalk.com
A guy tests an O ring from a chain in WD40 for a month. Unfortunately I don't see them specify exactly what rubber the O ring is made from.
So, materials commonly known as rubber include: Nitrile, Buna, Silicone, Viton, FFKM, FKM, EPDM, Neoprene, Natural Rubber, Flourosilicone. They all have different chemical compatibilities, so ideally you do need to know what material your brake seals are made from. Sorry about TopCat
That said my brakes need to be in good order.