PVA Mould Release
PVA is a special formula release agent for the fiberglass industry. This product is designed to prevent lamination of the product to the mould. Preventing the mechanical or chemical bonding of the molded material to the surface of the mould. PVA is a film-forming solution, which places a positive barrier between the mould and the product or component.
PVA may be used on smooth, hard surfaces or on other surfaces in tandem with wax style mould releases such as MACWAX. PVA is best used in conjunction with wax style release agents as an extra or additional barrier; particularly in the moulding of small, intricate or challenging shapes. PVA should also be used together with waxes on poor surface moulds and on absorbent surface moulds.
Preparation:
All surfaces should be cleaned. Care should be taken not to apply PVA to surfaces that contain moisture, such as new plaster as this will be detrimental to the final product. As PVA contains both water and alcohol, care of application is required to prevent dilution or scaring of moulds soluble in either of these two components. Moulds surfaces should always be clear of dust as this can become sealed under the mould release and cause deformities on the finished product. No silicone should be present on the mould. When cleaning the mould with solvents or water, allow to dry. For more information please refer to SDS and TDS.
We are frequently asked if PVA release agent and PVA glue are the same. Please note that PVA (polyvinyl alcohol) ethanol-based release agent and PVA glue (Polyvinyl acetate) are different products with distinct purposes, despite both containing polyvinyl. PVA release agent prevents sticking; PVA glue is an adhesive.
