Shield with "non-stick"-PTFE¹
Shield is a long-lasting wax designed for tough service on modern vehicles and SUVs. Because of its almost legendary ”non-stick” effect, dirt and insects find it almost impossible to adhere to our highly concentrated natural wax with PTFE, just as a fried egg will not stick to a PTFE-coated frying pan.
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¹What is PTFE?
Polytetrafluoroethylene (PTFE) resin is in a class of paraffinic polymers that have some or all of the hydrogen replaced by fluoride. The original PTFE resin was invented by DuPont in 1938.

PTFE is a completely fluorinated polymer manufactured by free radical polymerization of tetrafluoroethylene. With a linear molecular structure of repeating –CF-CF2-units, PTFE is a crystalline polymer with a melting point of about 621°F (327°C). Density is 2.13 to 2.19 g. PTFE has exceptional resistance to chemicals. Its dielectric constant (2.1) and loss factor are low and stable across wide temperature and frequency range. PTFE has useful mechanical properties from cryogenic temperatures at 500°F (280°C) continuous service temperatures. Its coefficient of friction is lower than almost any other material. It also has a high oxygen level.