RAIDZAP MEDIUM - build heads and bodies. A clear UV resin and quick cure with RZ 365 Pro. Raidzap Medium we know on the flytying table as a normal viscosity, it is neither too thin nor too thick. It can handle most tasks on almost all flies.The most popular formula for building heads or bodies. That's why, Raidzap Medium is also our most recognized UV resin and our best-selling UV resin for fly tying. Cures with any UV light. Cures hard and clear. Thin tip. 0.5 oz. ( 15 ml ) Brush and syringe needle in the box.