Black staining from rubber fittings

[chriscraft]

My RIB is just over 4 years old. Black marks are starting to come off the rubber fittings and stain the grey hypalon. The more I clean the boat, the more black marks are appearing. I'm just using standard detergent. Black also comes off the rubber fittings on to hands. Is there anything I could use to seal the rubber and prevent this happening? Thanks.

[Maximus]

Try 3m Rib protector,also Ribcraft do thier own Rib Product which you leave to Dry. Autoglym Bumper care brings em up, and acts as a sealer too.

[Ribshop]

Try using a Rib Conditioner on the black fittings and on the tubes, this will help seal the rubber
http://www.rib-shop.com/product.asp?...k=yes&P_ID=562