Premium Flex‑Leg Window Sash Weatherstrip – Universal Seal for Wood & Metal Windows (1977–2010 Models)

Price: $311.88
SKU: BG 708-399 BK 999

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.

Designed for compatibility with a wide range of window profiles (see diagram), this seal is ideal for Airmaster, Alenco, Alhom, Alsco, and many other brands manufactured between 1977 and 2010.

Why Customers Choose Our Flex‑Leg Weatherstrip

  • Superior Double‑Function Design for maximum sealing efficiency

  • Enhanced compression & flexibility for long‑lasting performance

  • Compatible with multiple window profiles and legacy window models

  • Perfect for restoration, repair, and energy‑efficiency upgrades

  • Trusted by professionals — “There are none better.”

Product Specifications

  • Lengths: Ships in 150" stock lengths; cut to 72" lengths for shipping

  • Minimum Order: 72 lineal feet

  • Colors Available: Beige (default) or Black

    • To receive Black, simply specify “black” in the checkout comment box

  • Application: Wood or metal sash windows, multi‑brand compatibility

  • SKU: BG 708‑399 (Beige), BK 999 (Black)

Special Order Notice

This item is a Special Order product and is custom‑cut for shipment. Please allow standard processing time for special‑order fulfillment.

Support

Need assistance identifying your window profile or selecting the correct seal? Contact us at Info@BiltbestWindowParts.com — we’re here to help.

 

$311.88