Xencast® RW4 is a very reliable high-build release wax spray suitable for a wide range of mould-release and barrier applications.
RW4 is compatible with all thermoset resin systems including epoxy, polyester, vinylester and polyurethane and is suitable for use on most substrates including rigid metals, plastics and laminates, as well as flexible polyurethane and silicone moulds.
The aerosol (spray) format makes the wax easier to apply over complex or intricate mould surfaces than conventional hard wax and has the distinct advantage over PVA release agent in that it won’t fish-eye away from repellent substrates or previous release agents.
RW4 contains no silicone and is suitable for use up to 100°C.
How to Use
New patterns, moulds or surfaces will typically require 2-3 coats of RW4. When re-using existing moulds, a single application between releases is often sufficient. When applying to new porous or semi-porous surfaces such as wood, MDF or plaster, 4 or 5 coats may be required. Multiple thin applications are preferable to fewer, thick applications.
Hold the can approximately 300mm from the mould surface and spray evenly, keeping the can moving. Ensure complete coverage. Allow each coat to dry for 10 minutes between applications. Once dry, RW4 can be buffed to a high-gloss, or can be left with a light texture.
Always ensure the wax has fully dried (at least 10 minutes after the last application) before casting.