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Barriercoat Crestacoat 5000PA View larger

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Crystic Barriercoat 550PA, Isophthalic Polyester Barriercoat for Improved Aesthetics White 337

17,39 €

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Crystic Barriercoat 550PA is an isophthalic barriercoat formulated for brush application.


Crystic Barriercoat 550PA is recommended for use where good surface aesthetics are required for glass reinforced laminates. It is particularly recommended for use behind dark colour gelcoats and for vacuum infusion. For marine applications, use above the water line only.


Crystic Barriercoat 550PA should be allowed to attain workshop temperature (18 - 20°C) before use. Crystic Barriercoat 550PA requires only the addition of catalyst to start the curing reaction. The recommended catalyst is Butanox M50 (or other equivalent catalyst) which should be added at 2% by weight into the barrier gelcoat with a low shear mechanical stirrer where possible. (Please consult our Technical Service Department if other catalysts are to be used).

Pot Life

The pot life of Crystic Barriercoat 550PA is approximately 9 minutes at 25°C.


Crystic Barriercoat 550PA is designed to be used behind a standard gelcoat and should be applied when the gelcoat has reached sufficient cure for normal lamination to take place. It should be applied by brush application to a recommended thickness of 1 mm. It is recommended that the barrier gelcoat layer is as even as possible. As a guide, approximately 1.4 kg/m2 of barrier gelcoat mixture will give the required thickness when evenly applied.


Crystic Barriercoat 550PA is supplied ready for use. The addition of any additives may adversely affect the performance of this product and therefore should not be used.

Recommended Testing

It is recommended that customers test Crystic Barriercoat 550PA before use under their own conditions of application to nsure the required surface finish is achieved.

Physical Data - Uncured

The following tables give typical properties of Crystic Barriercoat 550PA when tested in accordance with SB, BS EN or BS EN ISO test methods.

* Curing Schedule - 24 hours at 20°C, 3 hours at 80°C.
†Curing Schedule - 24 hours at 20°C, 5 hours at 80°C, 3 hours at 120°C.

Type of supply

Barriercoat Crestacoat 550 PA x 1 kg, supplied with 20 g of MEKP catalyst

Barriercoat Crestacoat 550 PA x 5 kg, supplied with 100 g of MEKP catalyst

Barriercoat Crestacoat 550 PA x 25 kg, supplied with 0.5 kg of MEKP catalyst

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