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LIGHTNING FLASH™ FLASHING CORNERS​ (Pack of 50) - Free Shipping!

LIGHTNING FLASH™ FLASHING CORNERS​ (Pack of 50) - Free Shipping!

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


The only product of it's kind made in the USA - No cheap imports!


Smart design allow one corner to be right handed and left handed.

You will need 2 corners to create a pan under a window.

You will need to buy Self Adhered Flashing material to complete your pan.

High impact resin is perfect for creating pans under windows.




    There are a few important things to keep in mind when returning a product you purchased online from TLS Laboratories:

    • You have 14 calendar days to return an item from the date you received it.
    • Only items that have been purchased directly from, can be returned to TLS Laboratories. TLS Laboratories products purchased through other retailers must be returned in accordance with their respective returns and refunds policy.
    • Please ensure that the item you're returning is repackaged with all the materials that were included when you received it.



    Once we receive your item, a refund is initiated immediately. If you canceled a pickup item, and you were billed for it, we initiate your refund immediately after you submit your cancelation request. The way your refund is processed depends on your original payment method:

    • If you paid by credit or debit card, refunds will be sent to the card-issuing bank within five business days of receipt of the returned item or cancelation request. Please contact the card-issuing bank with questions about when the credit will be posted to your account.

    All products are sent out using USPS. This guarantees a flat rate shipping fee for our customers within the United States with a reliable delivery service in order to ensure products are delivered on time.

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