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Reliable & Honest

TLS Laboratories has developed the Lightning Flash® Flashing Corners for builders that need cost effective window pans under their windows. These corners have been designed with vinyl and aluminum windows in mind. Inexpensive, Very Effective and Easy to use. And these products are Proudly Made In The USA (Help us do our part to put America back to Work)! Lightning Flash corners work great with Fortifiber products and will be compliant with the Fortishield warranty by the Fortifiber Building Systems Group. Call 800 310 7673 for pricing and distribution in your area.

Especially designed for window pans and other transitional flashing needs. Electrical outlets and open nail fin corner problems are easily solved with Lightning Flash!

Ready to Buy Now?

Buy 20 LF Corners NOW! Click Here!

Buy 100 Lightning Flash Corners NOW! Click Here!

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