I saw this disclaimer at the end of their website:
Important: Rubber Care may cause slipperiness and should not be used on floors, stairs, controls (such as pedals and grips), and other objects where slipperiness may be hazardous due to loss of control.
So, probably not recommended to use on those "Drug Store date nite 3 packs:.... or not!!?? Gotta avoid those hazardous situations, ya know...
I have had good success with a product called "Back to Black" Car showroom look that lasts a month or so. For black trim & rubber only.