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PMS
Solvent-based fire protective Basecoat for structural steelwork
Indoors / outdoors
Renitherm® PMS is a white single pack thin film coating that foams up under the effect of fire/heat (intumescent) to form an insulating layer.
Renitherm® PMS fire protection system for structural steel is available in two different grades for internal and external use.
Characteristic
Fire-resistance rating:
30 minutes; 1 hour; 1 1/2 hours; 2 hours
(Tests acc. International Standards)
check the fire
Method of Application
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airless spraying: equipment with a ratio of 45:1 yield 4 5 Litre/min
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recommended is an intermediate drying period of 2 hours for applying the amount of 2.000 g/m2
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brushing/rolling: several coats are necessary with the intermediate drying time of approx. 2 hours
Drying times
Drying of Renitherm® PMS depends on a number of factors including:
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temperature
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air movement
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thickness of coating
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humidity
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method of application
High humidity and low air movement or low steel temperatures will increase drying times and low ambient temperatures. Thicker coats will also take longer to dry than thin coats.
Once the total loading of PMS has been applied, the coating must be completely dry before application of the Topseal. This typically can be between 5 days for lower loading and up to 15 days for maximum loadings. Brush or roller applications may take up to 20 % longer to dry compared to spraying.
Maintenance
Damaged areas should be abraded back to a sound surface preferably by wet abrasion.
The surface should then be clean and dry before re-applying.
PMS filler may be used for repairing scratches and chips.
Once the repaired top seal should be re-applied.
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