Crystic 65PA White 337 Brush Polyester Gelcoat
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Crystic Gelcoat 65PA is a pre-accelerated, isophthalic gelcoat. It has been formulated for brush application, but spray versions are available.
Crystic Gelcoat 65PA is a pre-accelerated, isophthalic gelcoat. It has been formulated for brush application, but spray versions are available. Crystic Gelcoat 65PA is available in a wide range of colours and the information contained in its technical data sheet also applies to these pigmented versions. A non-accelerated version, Crystic Gelcoat 65, can also be supplied.
Crystic Gelcoat 65PA is designed for use in the marine, building and transport industries. It is also suitable for general moulding requirements.
Crystic Gelcoat 65PA has excellent water and weather resistance.
Crystic Gelcoat 65PA is approved by Lloyd’s Register of Shipping for use in the construction of craft under their survey. When backed with Crystic 356PA, it is capable of obtaining a Class 1 certificate to BS476 Part 7 and of satisfying the requirements of the Building Regulations for a Class O structure. The same laminate can also achieve an M1 rating to the French Epiradiateur NFP 92-501 test.
Gel time at 20 ºC: 15 minutes
Deflection Temperature Under Load† (1.80 MPa): 75 ºC
Type of supply
Crystic Gelcoat 65PA Isophthalic White 337 Brush Gelcoat x 1 kg, supplied with 20 g of MEKP catalyst
Crystic Gelcoat 65PA Isophthalic White 337 Brush Gelcoat x 5 kg, supplied with 100 g of MEKP catalyst
Crystic Gelcoat 65PA Isophthalic White 337 Brush Gelcoat x 25 kg, supplied with 0.5 kg of MEKP catalyst
We recommend sanding before applying a second coat. Ideally, you should do it with a thicker sandpaper, 320-400, so that it generates a good mechanical anchor. Leaving a completely mark-free finish is complex, so once that second coat is dry you will have to sand, polish and polish. At that point you can start with a 600-800 or even 1000, it all depends on how you finished.
A gelcoat should not be applied over an old gelcoat as it will peel off over time. Even if you sand the old gelcoat. To apply a gelcoat/topcota, you would need to remove the old gelcoat and then apply a new resin and fiber laminate. Another option would be to sand the old gelcoat, then apply an epoxy primer and finally 2-3 coats of 100 g/m2 each of a high-resistance polyurethane paint.