Excalibur is a tradename for a non-stick

Non-stick surface

A non-stick surface is a surface engineered to reduce the ability of other materials to stick to it. A non-stick coating may be applied to a substrate to produce such a surface. One common application of non-stick coatings is cookware. Until recently, Teflon has dominated this market. However,...

 coating system developed by Whitford Corporation and introduced in 1993.

The Excalibur coating system consists of three layers of polytetrafluoroethylene

Polytetrafluoroethylene

Polytetrafluoroethylene is a synthetic fluoropolymer of tetrafluoroethylene that finds numerous applications. PTFE is most well known by the DuPont brand name Teflon....

 (PTFE) applied over a specially-prepared metallic substrate. The substrate is first grit-blasted

Abrasive blasting

Abrasive blasting is the operation of forcibly propelling a stream of abrasive material against a surface under high pressure to smooth a rough surface, roughen a smooth surface, shape a surface, or remove surface contaminants. A pressurized fluid, typically air, or a centrifugal wheel is used to...

 to roughen it, then electric-arc sprayed

Thermal spraying

Thermal spraying techniques are coating processes in which melted materials are sprayed onto a surface. The "feedstock" is heated by electrical or chemical means ....

 with a proprietary stainless steel

Stainless steel

In metallurgy, stainless steel, also known as inox steel or inox from French "inoxydable", is defined as a steel alloy with a minimum of 10.5 or 11% chromium content by mass....

 alloy.

According to Whitford, the irregular surface promotes adhesion of the PTFE and also resists abrasion of the PTFE.

Excalibur coating systems are used for cookware

Cookware and bakeware

Cookware and bakeware are types of food preparation containers commonly found in the kitchen. Cookware comprises cooking vessels, such as saucepans and frying pans, intended for use on a stove or range cooktop. Bakeware comprises cooking vessels intended for use inside an oven...

as well as in industrial applications.