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PRIMO clamp sealings are used in renovation projects where windows and doors are produced earlier than 1990, where you will typically find that these types of sealings are used. The clamp sealings are placed between the frame and the sash, thereby optimizing the isolation capabilities of the door or window.
If the clamp sealing is not replaceable in your existing windows or doors, we recommend using universal sealing gaskets instead.
See more about universal gasket here.