National Marker Co. strives to accomplish the same two goals: manufacture the highest-quality safety identification products and help make the world a little bit safer. NMC delivers the highest quality product in the fastest way possible, while protecting end users and providing peace of mind. Sign Muscle® is a perfect example of the company’s commitment: a patented liquid laminate developed to extend the life of an NMC sign from years to decades.Shop All National Marker ProductsVisit National Marker Website