Wax

Waxes are a class of chemical compounds that are plastic (malleable) near ambient temperatures. Characteristically, they melt above 45 °C (113 °F) to give a low viscosity liquid. Waxes are insoluble in water but soluble in organic, nonpolar solvents. All waxes are organic compounds, both synthetic and naturally occurring.

There were figures of the Justice League of America on display in the Justice League Hall of Fame that are made of wax. During an intense heatwave, they melted, and Wendy, Marvin and Wonder Dog rush to save the costumes from being ruined by the wax.

Appearances
Super Friends
 * Season 1: Too Hot to Handle