8mm Instafit wiper seal (sold by the metre)- The original patented cranked blade wiper seal offering minimal resistance to opening or closing and operates out of sight. This seal is weather energised, the harder it blows the tighter it seals. Ideal for doors and windows, for outward opening units groove into sash or door and for inward opening units groove into frame as illustrated. It is also the perfect seal for top, bottom and centre rails of sliding sash windows. Available in white black or brown
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