Each Electrical Tape has a specific use as well as a specific color. Each Color will refer to its specific use. Black Electrical Tape is the most common Electrical Tape used for sealing and grounding unused electrical currents or wires. It is always best to cap or plug a wire no longer in use in addition to wrapping the cap with electrical tape.
Glass Cloth tapes are made with woven fiberglass backing. General Purpose Glass Cloth Tape usually feature a pressure sensitive silicone adhesive that is used for applications requiring high-temperature resistance and/or high adhesion. It is often used for high temperature applications requiring high tensile strength and good holding power.
Liquid Electrical Tape provides a waterproof seal that is formulated to be resistant to chemicals, solvents, saltwater, and many other elements that may degrade or deteriorate the PVC Electrical tape over time. Liquid Electrical Tape is a fast drying and unraveling alternative to standard Black Electrical Tape.
Typically electrical tape is made from PVC (polyvinyl chloride). When burned PVC emits extremely toxic gasses and can be harmful is ingested. PVC for the most part has been banned from being used in things like toys or utensils in most countries including the United States because of potential harmful agents from the plastic.