Weather Strip & Seals

BENCHMARK / BETTER‑BILT / BF RICH Flex‑Leg Window Sash Weatherstrip – Casement, Awning, Double Hung, Single Hung

Premium Flex‑Leg Weatherstrip – Universal Window Sash Seal for Multiple Window Types

Upgrade the performance of your casement, awning, double hung, or single hung windows with our industry‑leading Flex‑Leg Weatherstrip. Engineered with an improved double‑barb kerf insert, this sash seal delivers a tighter, more efficient barrier between the sash and frame — outperforming standard weatherstripping used on older wood or metal window systems.

Upgrade the performance of Acadia, ACORN, ACRO, ACME, ALENCO, and other compatible window systems with our Flex‑Leg Weatherstrip, a premium double‑barb kerf insert engineered for superior sealing between the sash and frame. This improved design delivers dramatically better protection against air infiltration, wind, moisture intrusion, and temperature loss compared to older OEM seals.