Do you have any idea how to soften carb rubber ?
I was modifying airbox and the FZ rubbers I buy are too hard.
Trying with hot water and they get soft but for short time, soaking in glycerine is working so far.
Heard of pine sole soaking method .. but we don't get pine sole in Poland

(The primary ingredients in Pine-Sol are pine oil, surfactants, and isopropanol. Labeling also warns of alkyl alcohol ethoxylates content in the product.)
maybe some advice ?

