Monokote

MonoKote is commercially available light weight plastic shrink wrap film available in various color schemes with an adhesive on one side, used to cover and form the surfaces of a model aircraft. The material is cut to size and applied to the airframe surfaces using a hobby iron or heat gun. TopFlite Monokote covering film is made by General Formulations.

The name MonoKote, a registered trademark of model aircraft manufacturer Top Flite, refers to the fact that it is a one-step covering material to coat the surface of the model to seal the flight surfaces. The patent for Top Flite Monokote is held by Sidney Axlerod

Monokote is also a type of fireproofing material, which is either gypsum- or cement-based and is spray-applied. • the name MONOKOTE is the subject of global trademark registrations owned by GCP Applied Technologies Inc., a Delaware Corporation formed from the Grace Construction Products and Packaging businesses that were spun off from W. R. Grace & Co. in February 2016 (e.g., US Registration No. 1,468,327; Canadian Registration No. 858389; and other international registrations).

...
Wikipedia