Petroleum jelly can hydrate all parts of your hands. If your nails are brittle, it can help fill in and smooth out some of the ridges and rough spots. Equate Lubricating Jelly Personal Lubricant, 8 oz Ingredients and Reviews 5 Reasons to Avoid Vaseline as Lube (+ What To Do Instead) Coconu The use of petroleum jelly for lubrication, especially during intercourse is NOT advisable. This is because the petroleum jelly will likely defeat the purpose of lubrication. In truth, it may cause more lubricants Advanced Dermatology, P.C. Always use silicone or water based lube! Using oil based products like lotion, cooking oil, baby oil & Vaseline can cause condoms to break!