Generally speaking, silicone grease provides excellent lubrication between these materials:

Plastic to plastic

Rubber to rubber

Rubber to plastic

Plastic to metal

Rubber to metal

Here are a few more specific household applications for silicone grease:

Lubricating door hinges, window tracks, drawer slides, and other moving parts

Can be applied to rubber gaskets on kitchen appliances to maintain their flexibility and prevent leaks

To condition a worn-out refrigerator gasket (seal)

Applied to O-rings on a sink faucet

Lubricating and conditioning rubber components in cars and other vehicles

Lubricating screw threads to prevent sticking and corrosion

Lubricating piston seals and plunger shafts of fountain pens