Chapin Xtreme 3.5 Gallon Industrial Concrete Sprayer - Heavy Duty Handheld Tank with Tri Lock Seal, 4" Wide Mouth & Lock-On (Red) - Perfect for Construction, Masonry & DIY Concrete Projects

This product works beautifully. I used it to spray patterned/stamped concrete patio about 700 square feet and it took me about 30 minutes including one refill. The entire process was a lot easier than originally thought. The spray was even and effortless. The sprayer is well made. The plastic holder to hold the sprayer wand is a bit flimsy.I had difficulty getting the sprayer pump to close and lock properly. That was not an issue with the sprayer but the instructions in the user manual. The user manual had instructions on how to close and lock the pump, but no explanation on the possible causes and steps to get it close and lock properly if it ran in to issues. I wasted an hour or so trying to fix the problem. I finally gave up and was almost ready to ship the unit back as being defective. The next day, I took it to a rental store renting the similar unit and the technician got it working within 30 seconds. The manual should include Frequently Asked Questions section and include this common issue.Another item to expand in the user manual is about cleaning the sprayer. The manual says to clean with water only. However, the rental store told me that you can use xylene or paint thinner or water depending on the solvent in the spray material you are using. I have not confirmed this with the manufacturer. However, the manufacturer can include better description about cleaning fluid and explicitly include/exclue other cleaning fluids.Since this is late in the season, I will try the sprayer on other spray applications next season and see how versatile this sprayer is. However, it worked beautifully for the main application I bought this sprayer for.