Gelcoat surface aesthetics improved
A
Scott Bader Company product story
Edited by the Engineeringtalk editorial team
Apr 4, 2007
The Crystic Crestacoat 5000PA barrier coat is designed to create a glossy, high-lustre, ultra-smooth finish.
The Crystic Crestacoat 5000PA barrier coat has been introduced by Scott Bader to significantly improve gelcoat surface aesthetics for FRP mouldings.
It is designed to create a glossy, high-lustre, ultra-smooth finish which significantly outperforms spray-painted finishes achieved in the automotive industry.
When used with a matched-system skincoat Crystic VE679PA, the new barrier coat gives the best possible surface finish which, in a rigorous 12-month test, also provided outstanding osmotic blistering resistance.
This matched system is recommended for marine applications, or moulded parts used in other demanding environments which are surface-finish critical.
This can include laminate products produced for land transport, building and industrial applications or wherever superior gel coat surface finishes are specified.
Crystic Crestacoat 5000PA can also be applied behind the gel coat in mould making, substantially improving mould surface finish and subsequent moulding quality.
A 1mm thick layer of the barrier coat can dramatically reduce fibre pattern and orange peel effects which can otherwise mar gel coat finishes.
These common defects can be particularly obvious with darker colours, complex shapes and infused parts.
Following extensive research and development, a formulation based upon innovative urethane acrylate technology was used by Scott Bader in the creation of Crystic Crestacoat 5000PA.
It outperforms other vinylester and polyester barrier coats in the creation of superior surface finishes when subject to standard auto industry DoI measurement tests.
The tough, strong but flexible urethane acrylate resin backbone of this product ensures excellent interlaminar adhesive properties, making it particularly suited for the production of high-quality complex parts with sharp corners.
The flexibility also reduces air voids, cracking and pre-release in moulded parts which feature a sharp radius in the design.
The lightweight formulation also means that only 600g/m2 needs to be put down, using simple spray or brush techniques, to achieve the recommended 1mm overall thickness.
Low exotherm qualities also mean that even large structures can be treated in this manner with confidence.
Long-term surface quality and durability has also been established with products fully submerged for 12 months in water at 40C without any detrimental effects.
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