Markal Pro-Line HP is a new concept in liquid paint markers, designed to be the safest and most versatile paint marker on the market. It writes on any surface in the most difficult working conditions with a brighter, bolder paint mark that is long lasting and durable. Leaves permanent, clear marks through a wide variety cutting oils and soapy lubricants, rust preventive coatings and other types of hydrocarbon coatings Can be used on most types of coated metal surfaces including powder coating, rust protectants, PVC plastics and epoxies Writes on surfaces and in air temperatures as cold as 50�F below zero with a clear, permanent mark Low in halogenated compounds and sulfur for maximum use in corrosion sensitive applications Contains no California Proposition 65 listed chemicals Contains No US EPA Hazardous Air Pollutants No EPA SARA 313 chemical