Tripolymer

A Tripolymer is a composite material consisting of three different types of polymers. Polymers themselves are manufactured materials formed by combining units, called monomers, into long chains. Examples of polymers are starch (which has many sugar units), polyethylene (which has many ethylene units) and polystyrene (which has many styrene units).

Data's body contains, in part, 24.6 kilograms of tripolymer composites. (TNG: "The Most Toys") They are non-conductive. (TNG: "Disaster")

'The Star Trek: The Next Generation Technical Manual states that Isolinear Chips can be ruggedized with the application of a protective tripolymer sealant over the refractive interface surface.