Mastic sealing is used in lots of areas to provide a waterproof seal around windows, doors, and any overlapping joints. Great for re-bedding external trims and general sealing applications.
W4 narrow mastic sealing strip. High-performance mastic sealing strip specially formulated for sealing and re-bedding caravan fittings. Formulated for the sealing and re-bedding of overlap joints, awning rails, roof lights, vents, window surrounds, and most external trims.
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