Oil
The oil on the skin.
Ceramic
Sebum
Samsonite Luggage Winfield 20in. Carry-On Spinner is waterproof as is some of the Travelpro line.
Depends on what kind of duck tape.
You should use scotchguard waterproof coating on your sofas to protect it from spills.
For grooming and to spread oil from their oil gland to help keep their fur waterproof.
NO,your skin is waterproof,oil-proof and paint-proof etc.(unless,you ignite the oil,which would be STUPID)
Wax.
Vinyl and PVC are both cheap waterproof materials, but they don't breathe and can get kind of hot. I don't think of them as a very good material, but they are waterproof, and good if you think so.
Most people believe that birds waterproof their feathers by the oil located on their backs but that is not how they waterproof it. The interlocking hooks and barbules on feathers is what makes a bird waterproof and not all bird are waterproof. -Kynlee Bird Expert