I lube all my "rubber" O-rings and such with Vasoline. If Vasoline eats plastic, would they sell it in plastic jars? The problem with the internet is that you CAN read almost anything on any subject.
Agreed. But there is more to support you.It is the type of hydrocarbon that matters. Petroleum jelly is insoluble in water. It is used on skin and in cosmetics. It is used over wounds to keep a bandage from sticking.
Petroleum jelly is a mixture of hydrocarbons, having a melting point usually within a few degrees of human body temperature, which is approximately 37 °C (99 °F). It is flammable only when heated to liquid, then the fumes will light, not the liquid itself, so a wick material like leaves, bark, or small twigs is needed to ignite petroleum jelly. It is colorless, or of a pale yellow color (when not highly distilled), translucent, and devoid of taste and smell when pure. It does not oxidize on exposure to the air and is not readily acted on by chemical reagents. It is insoluble in water. It is soluble in dichloromethane, chloroform, benzene, diethyl ether, carbon disulfide and oil of turpentine.
Depending on the specific application of petroleum jelly, it may be USP, B.P., or Ph. Eur. grade. This pertains to the processing and handling of the petroleum jelly so it is suitable for medicinal and personal care applications.
Plumbers putty isn't for use in a situation where parts move. Plumbers use it to seal a sink in a counter, a drain in a sink or tub, around a faucet or fixture such as a shower valve. It is never used in a case where parts move or it is under pressure. It is usually made from linseed oil and clay.