Muc off bike cleaner concentrate 500mlthe muc off bike cleaner concentrate has arrived thats right the muc off relentless rd team made their nano tech bike cleaner that much better by creating a handy refill pouchit gets even better the bike cleaner concentrate can also be used as a powerful degreaser in its concentrate form and it really works like a charm in muc offs x1 chain cleaning device hows that for multi usein case you were wondering bike cleaner concentrate is safe to use