We had concrete slung down the side of a pickup. It was mostly very thin but well-adhered. This product worked, kinda. It wasn't as easy as 'spray it on and power wash it off'. It took several applications, each sitting for around an hour or so, and a 4k PSI 240-degree hot water pressure washer. Eventually, we got it off using muriatic acid between applications of this product. I'm not saying it's a bad product. I realize there might be differences in the concrete it's tasked with removing. All I'm saying is if it happens again, I'll probably try one of the other products on the market.We are a shotcrete company and this product works great for us. It removes concrete from our equipment without damage or with ease.Bought the product with the intention to remove dried concrete from my truck. Follow instructions on label and applied product on max concentration and did not perform at all. After several applications the concrete remains and only help removing a 10%