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WBL3 Folding Flush Fin Window Block
WBL3

WBL3 Folding Flush Fin Window Block

Folding window block for flush fin windows featuring patented Lock Tight® technology. One part protects the entire corner. The living hinge can be cut to provide mid-point protection on larger windows. Features double-sided tape for easy application. Eliminates damage from sliding or dropping during shipping and installation.

This product is not available for online purchase — to place an order, please contact us.

Units per box:

Quantity Discount Item Price
1–4999 Boxes $0.8/Box
5000–100000 Boxes -6% $0.75/Box
100001+ Boxes -13% $0.7/Box

For orders larger than 9, please contact us.

Made in the USA

Made in the USA

30+ Years in Business

30+ Years in Business

Fast Shipping

Fast Shipping

Installation

The WBL3 applies quickly with no tools required.

  1. Unfold the window block using the living hinge. If needed, cut the hinge to use as two separate mid-point protectors for larger windows.
  2. Peel the backing from the double-sided tape.
  3. Position the block on the flush fin window corner and press firmly to adhere.
  4. Click the Lock Tight® mechanism closed to secure the block in place.
Compatibility
Shipping & Returns Policies

Orders are typically processed within 24 hours (excluding weekends and holidays). 1–9 boxes ship via UPS Ground; larger orders ship via freight. We ship worldwide — international customers are responsible for any applicable customs duties, taxes, or import fees. Tracking information is emailed for all orders.

If your order arrives damaged, retain the packaging, photograph the damage, and contact us so we can work with the carrier on your behalf.

customerservice@doorframer.com

This is a condensed version of our Shipping Policy. View our full Shipping Policy.

Protect your product from shipment through installation by pairing the WBL3 with:

Del and Ron, founders of DOORFRAMER, INC. sitting outside.
Anne and Dave Vanderpan, VP of Marketing and CEO of DOORFRAMER, INC. respectively, at a trade show.

About Us

30+ Years of Door & Window Packaging Innovation

We're a family-owned American manufacturer dedicated to protecting craftsmanship. Since 1992, we've become the #1 source for innovative door and window packaging solutions.

Our lineup of more than 30 products is proudly manufactured in the USA and designed to keep your products looking showroom-ready.

About DoorFramer

Frequently Asked Questions

All products are shipped from our U.S. production facilities in California and Illinois.
The WBL3 is designed for flush fin windows.
Yes! The living hinge can be cut to provide protection at the middle of larger windows, giving you two protectors from one piece.
Yes! To request a free sample, please contact us.

Have other questions?

Contact Us