Schluter KERDI-KERECK-F - 4 mil Thickness - Outside Waterproofing Corner - Qty: 10

Here is the deal are these different than the knock offs, probably not, but if you have a problem and you used Schluter branded products they have your back. Spend the extra money and buy the real deal.

thin and strong - easily sets using thin set mortar

If your shower has corners, you need the preformed corner pieces! They come made for interior and exterior corners. I have installed three showers in my home and tiled several bathroom floors. Even using cement board, I wouldn't do it without Kerdi, at least at the corners and corner edges. My sense is that eventually water can get anywhere, and you do not want a leaky wall or floor in or near your shower or tub. If properly applied, the Kerdi will prevent any water from seeping or leaking behind your walls or floors.

I'm sold on Schluter's products and though I didn't need 10 of these I'm sure I will use them sooner or later. WAY easier than trying to fold the corners.

Disappointed with the return policy. The item is great but in the process of remodeling our bathroom we are now outside of the 30 day return policy and haven't even opened the product but can't return it when it's no longer needed.