ND Industries, Inc. has responded to complaints about door rattling and other noises with ND Plastisol. The problem was occurring because the nylon clips used to hang the door panels did not fit as snugly as they should. ND Plastisol is a liquid vinyl compound that is fused to a fastener by applying heat. It is designed to seal against air, water, and dirt, while absorbing noise and vibration. The material is applied directly to the nylon door clips to create a tighter seal and reduce vibration and noise.