(#21683) and Diamond-Kote MTL Long Life UV Clear (#21688), not only protect colors from UV the use of a first down primer and a last down high performance, long life non-yellowing clear. Diamond-Kote Primer Polymeric’s Diamond-Kote MTL (Metal) Decorating System is a matched component construction that implements exposure but also provide unmatched chemical, solvent, and abrasion resistance. Diamond-Kote MTL UV Clear contains UV inhibitors effective in preventing pigments from fading and offers a service life of up to 10-years direct outdoor exposure.