General Finishes Enduro® RTM Enduro Stain Matching System is the EASIEST water-based stain color-matching system on the market. Professionals or retail stores can match any color on-site in minutes using 12 standard stain bases and save money by reducing inventory. Take a look now. Every year, General Finishes formulation experts source the world for the best materials, and if they pass our scrutiny, they will show up in the can that arrives at your door. RESULTS you can TRUST every time. Enduro®, the gold standard for professional water-based finishes®.