Other materials include ballistic nylon, vinyl waterproof tarp lining used to make the bag waterproof. Larch wood is valued for its tough, waterproof and durable qualities. Contemporary bags use thicker gauges of canvas and tarp shielding for the inner waterproof lining. It was intended to be durable, waterproof and elegant. Their thick vulcanized rubber collar is clamped to the corselet making the joint waterproof. Celluloid dickeys were popular for their waterproof and stain-resistant properties. The mat is then coated with asphalt containing mineral fillers to make it waterproof. One useful small sonar is similar in appearance to a waterproof flashlight. Dubbin has been used since medieval times to waterproof and soften leather boots. Epoxy resin is two times stronger than concrete, seamless and waterproof. However, the DWR is not responsible for the jacket being waterproof. A conduit system can be made waterproof or submersible. Airtight implies both waterproof and vapor-proof. He reached the surface of the water by removing his heavy boots and waterproof clothing. It provides a thick, waterproof covering to the living inner tissue.