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Reviewed in the United States on February 28, 2020
Easy to use and helps make window sill waterproof.
James Y
Reviewed in the United States on October 15, 2020
simple effective product , quote overpriced in my opinion . If one has a 3d printer , could create your own , thats would be neat in the future
Greenacre
Reviewed in the United States on May 1, 2015
A little pricey, but they perform as expected. Easily installed. They could be a little thinner...by the time you add layers of flashing tape, the top of the window needs to be shimmed to be vertical to the bottom. Or, you could use 4 corners on every window...but that would be really pricey.
Rmplstlskn
Reviewed in the United States on November 10, 2014
Super easy to flash in corners, which is usually a hassle and requires multiple layers upon layers to seal properly. The ease and 100% surety of a good corner seal easily outweighs the expense, which is not unreasonable. Easy to install too!In hindsight, and for future flashing, I would also use these for the upper corners as well, as once flashed in with tape, will also be 100% water tight.
Diana Bishop
Reviewed in the United States on May 10, 2013
We used this product to line the corner of the window framework when installing replacement windows in our house. Found it to be an excellent application for insuring a solid, watertight seal around the framework which will last for years to come.l
coil_nine
Reviewed in the United States on December 12, 2013
Great product. Easier to store than a $180 roll of flexible flashing, just as effective, and you can use the standard straight flashing you have on hand.
RetiredEE
Reviewed in the United States on October 2, 2013
I just received my order of these Lightning Flash corners. I thought I'd do what the manufacturer wouldn't: provide product specs. Here goes.They appear to be made of flexible nylon, which won't easily break, crack, or degrade. It is a translucent white color, not opaque. The thickness of the plastic as 0.050", or less than 1/16" (=.063"). It's hard for me to measure a radius, but I would estimate each corner radius to be about 1/16". Each flat flange is about 2.5", as is the large radius. If for any reason you want to cut one of the sides, you won't have any problem doing so with a pair of sturdy shears.I want to keep the additional thickness required to get a tight seal between the window and the housewrap down to a minimum. I will be using 3M 8067 tape over the corners rather than the more traditional rubberized tapes, which should hold the total bulge in each corner, including the Lightning Flash corners, to under 1/16". Not bad!While they look like a very nice product, I can't help but think that the cost of making them has to be close to nothing. Someone's making a tidy profit off of them, but hey ... if they work, it's still cheap insurance compared to the overall cost of the window plus its installation.
Contractor Harv
Reviewed in the United States on August 21, 2012
The use of Lightning Flash Corners makes flashing windows (and doors) easier, faster and allows you to sleep at night knowing that you installed the flashing the 'right way'. No more corner movement when you install a window. These corners are solid and not too thick and very easy to install. Suggest you view the web site to learn the importance of using Lightning Flash Corners and the right way to install them. Price is very fair and shipping was faster than expected. Plan ahead and your order will be shipped right to the job site. Thanks for providing a great product that puts our window/door installation ahead of the pack.
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