Rubberized Coating lets you make quick, easy, inexpensive leak repairs on your air conditioning and refrigeration systems. Just spray on it dries in just few minutes to stop leaks and seal out both rust and corrosion. Apply it in just about any condition, even moist conditions, for long-lasting protection. And insulating varnish impregnates and insulates metals, windings and coils for electrical and electronic work. Apply by brush, dip or spray.