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LIGHTNING FLASH™ XL "A" Piece - 20 Pack - Free Shipping!

LIGHTNING FLASH™ XL "A" Piece - 20 Pack - Free Shipping!

These are heavy duty corners for heavy duty applications. These work well for recessed openings that do not have a slope at the lower edge. They work great for window and door pans. The are great at the base of brick walls too!


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


Lightning Flash XL Flashing Corners are designed for Heavy Duty use.

They are made from medical grade plastic and very durable.

They are perfect for Wood window pan creation. They are great for French Doors too!

Lightning Flash XL Flashing Corners are great for commercial window systems.

Any 90 degree transitional flashing application is solved with Lightning Flash




    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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