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Use Bostik Flashband Primer S.V. for Roofs before applying Bostik Self Adhesive Flashing Tape to porous or dusty surfaces in damp or cold weather. Paint undercoat also protect your walls and surfaces and prepare them for the top coat, providing a neutral base for you to apply any colour, however bold it may be. Primer paint is essential if you're changing a colour scheme from a dark shade to something lighter, helping to show your topcoats true colour while keeping it vibrant for longer.
It is also ideal to use prior to the application of other bitumen products and particularly where there are porous or dusty surfaces.
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