Diamond Liners Brings Family Values to Their Business Operations. We are a Graco Spray Foam and Spray Coating Distributor. At Diamond Liners, Inc., there is no such thing as outside the scope of business hours, of work, of knowledge or of responsibility. Whether the job is waterproofing, coating, foam insulating, or bed lining Diamond Liner customers can count on an honest, comprehensive and expert solution for all their application needs. If that's not Diamond-level service, then what is? Polyurethane-Polyurea Hybrid coatings are no longer just for truck bedliners! We have expanded our service offerings from just truck bed liners that you may already associate Diamond Liners with, to a whole new array of spray foam and coating solutions. As we enter a new year, our resolution to you is to turn the economic challenges that we are all facing into opportunities for business growth. Diamond Liners is pleased to offer a variety of solutions to support your business in 2014.