Dubbin is sometimes used to make work boots waterproof. As per Wikipedia - Dubbin is a wax product used to soften, condition, and waterproof leather and other materials. It consists of natural wax, oil, and tallow. Dubbin has been used since medieval times to waterproof and soften leather boots. It is different from shoe polish, which is used to impart shine and color to leather. However, we should never use it on suede or nubuck leather as the oily dubbing wax can damage them.