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93PA TDS - 1

CRYSTIC GELCOAT 93PA Fire Retardant Spray Gelcoat Introduction Crystic Gelcoat 93PA is a pre-accelerated filled spray gelcoat. It is available in a restricted range of colours and the information contained in this technical data sheet also applies to pigmented versions. Applications Crystic Gelcoat 93PA can be used both internally and externally for building, transport and general industrial work. Features and Benefits Crystic Gelcoat 93PA has good weathering properties and very low flammability. Approvals Properly manufactured, fully cured laminates using Crystic Gelcoat 93PA and Crystic 356PA can achieve a Class 1 rating to BS476 Part 7. This combination can also satisfy the requirements of the Building Regulations 1976 (Section E15) for a Class O structure. Formulation Crystic Gelcoat 93PA should be allowed to attain workshop temperature (18°C-20°C) before use. Stir well by hand or with a low shear stirrer to avoid aeration and then allow to stand to regain thixotropy. Crystic Gelcoat 93PA 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% into the gelcoat. (Please consult our Technical Service Department if other catalysts are to be used). The catalyst should be thoroughly incorporated into the gelcoat, with a low shear mechanical stirrer where possible. Pot Life Temperature 15°C 20°C 25°C Pot life in minutes 21 15 12 The gelcoat, mould and workshop should all be at, or above, 15°C before curing is carried out. Spray Application Do • Gently stir the gelcoat before use by hand or low shear stirrer. • Ensure the gelcoat has attained workshop temperature of 18°C-25°C before use. (Temperatures below 18°C will require higher pressure to achieve an acceptable spray pattern and this will encourage porosity). • Spray at the minimum practical pressure whilst maintaining an acceptable spray pattern and full fan width. • Apply a mist coat and then build up thickness in long, even passes of 0.125mm (0.005 inch) until the recommended wet film thickness of 0.5-0.625mm (0.020-0.025 inch) is reached. This will minimise porosity and colour defects. Don’t • Stir the gelcoat with high shear mixers as this will temporarily break down the thixotropy leading to drainage. • Exceed a wet film thickness of 0.625mm (0.025 inch) as thick films encourage air retention. • Apply excessive thickness in corner areas as this can cause pre-release.

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93PA TDS - 2

Additives The addition of pigment pastes, or other additives, can adversely affect the spraying characteristics of Crystic Gelcoat 93PA. To avoid this, it is supplied in a restricted range of colours, which also eliminates the potential for mixing errors. The inclusion of additives can also adversely affect the weather and water resistance of the cured gelcoat. Recommended Testing It is recommended that customers test all pigmented gelcoats before use under their own conditions of application to ensure the required surface finish is achieved. Typical Properties The following tables give...

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