T-Slot Seals. The Silverline Offset T-Slot Foam Seal Weatherstripping features a foam-filled bulb seal that effectively seals gaps and prevents air, water, and noise from. Default sorting, Sort by popularity Wide T-slot Pile no fin. T-Slots are used in aluminum or vinyl windows, used as a frame or sash seal in casement windows, or on the meeting rail of double and single hung windows. . Quantity 13 = 13 linear feet. Sold by the linear foot. Buy T-Slot Mount Window Weatherstrip Seal 5/16" Bulb Bubble for 3/16" Slot Receptacle 3 Colors & 5 Length Options (10', White): Weather Stripping. Get t-slot mount window weatherstrip seal with free return and fast delivery. Color Black. T-Back Slides into slot Assorted Backings Widths. Find products of Sealing Strips with high quality at AliExpress. $ – $ Select options Height X Slide in Window Weatherstrip used primarily in Metal and Vinyl products. Showing 1–16 of 46 results. Window Hardware Extruded skin provides a unique UV resistant barrier with design features that enhance the weatherstrip's sealing performance. T-Slot bulb seal with rigid PVC backing in option. 18 Products. T-Slot Mount Window Weatherstrip Seal 5/16" Bulb Bubble for 3/16" Slot Receptacle 3 Colors & 5 Length Options (25', Grey) ; Item Weight, ‎ ounces ; Item model. T-Slot.