ATRO Engineered Systems' proprietary polymer for motor mounts that withstands punishing stress, chemicals and scorching heat. When EGR/SCR systems were added to heavy duty trucks an alarming rise in temperature occurred under the hood. This change caused motor mounts, rubber or polyurethane, to fail. Extensive field tests in high heat environments proved the worth of the polymer's properties, according tot he company. It could handle 300 degree temperatures under constant stress and brutal conditions. The polymer comes tinted red.