St. Louis Crayon & Soapstone Company offers the Supermark rubber crayon. The Supermark is made for marking rubber, but works well on many surfaces. It is preferred by roofers and packaged with Firestone Building Products roofing material. The rubber crayon has a high melting point and when used on hot rubber will not run or spread. Rubber crayons are available in white or yellow and you can special order red, black or blue.

Supermark - 4000

Supermark is made for marking rubber, but works well on many surfaces. It is preferred by roofers and packaged with Firestone Building Products roofing material.