Let me clarify... Some of the brands, in my experience, do show signs of deterioration with the use of simple petrolem products. Parker (or the other brands listed)will not have any negative affect on any of the brands of O-ring type brakes (that I am aware of). IMO, at 6.75 it is worth the cost of the tube for the assurance that it will not deteriorate my brake components. One tube will last you a decade or longer with the amount we require.
Just my .02