Description
The uniquely engineered Endura Z-Articulating Cap Sill™ Mull Stiffeners provide stability and added structure to the Z-Articulating Cap Sill™ and Sealing System. Positioned within the sill cap channel, the mull stiffener eliminates the need for caulking while adding greater protection against leaks and enhance your overall security in the sill system.
• Sits in the sill channel, against the mull or jamb, to seal the system from water or air infiltration
• Plastic stiffener with gaskets on each side to eliminate the need for caulking in the cap channel




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