Mayhems - PC Coolant - X1 Concentrate - Eco Friendly Series, UV Fluorescent, 250 ml, Black

I have been using Mayhems brand in my water-cooled rig for 7 years with no issue, gunking, algae growth or long term vaporization. Cooling is excellent when use properly. A fill can last as much as 3 years or more when NO aluminum is used. Perfect buy for water cooling CPU and GPU.

Turns clear when used to make larger quantities. No issues so far with mayhem soft tubing. Doesn't clog the channels in gpu/cpu waterblocks. Easy to mix and use.

It is more of a brown orangish color, and NOT UV. It also smells exactly like Tequila. This says its a "pastel" but when I used the yellow/green a few years ago, it was great. Super UV reaction and crystal clear. So I assume this stuff is really old. Can't tell though, because Mayhems (UK) has chosen NOT to put a date code of any sort on the bottle. Is that even legal in the US? No wonder. I also purchased Mayhems UV orange a while back and while it was orange it wasn't UV (anymore?). I still use the Mayhems XT1 UV Green to this day, it's outstanding. One pc has had the same Mayhems X1 clear with the UV yellow/green concentrate for FOUR years and it's still perfect.I like Mayhems products, their system cleaner is outstanding, as well as some of their products I also use.So Mayhems needs to put a date code/expiration/use by on their products, so people and vendors alike DON'T WASTE THEIR TIME and MONEY.I have a vid unsealing the second bottle, but I'll wait to see how Titan Rig handles the return, before I bother posting it. They have been great in the past for me though.

I used this in a new build with soft tubing (primo chill brand), mixed it the correct ratio - 125mL (half bottle) to 875mL (to make 1L total)I ran the loop with primo chill sysprep (came with the tubing) for about 24 hours, drained it, and filled with the mayhem's mix.At first I was happy with it, I liked the color (I got the purple), performance seemed very good.Over the course of a few months I realized this coolant was a flop. It completely lost it's color and became a cloudy clear and the tubing was cloudy, I'm not sure exactly what happened -dye leached into tubing or something? I will say that there was no corrosion (copper and nickel loop), and no algae growth from what I could tell. But what's the point if the stuff lost its color.I re-did my loop with black ZMT tubing and plain ole distilled water + primo chill utopia, I expect that to hold up much better.

Bought the purple. When I finally went to use it, The color of the dye was this awful brown color. Tried mixing it with water, to see if there was some kind of reaction that would turn it purple. Instead, I get this awful light-brown color. Might as well just fill my system with regular distilled water, and use the concentrate drops to make the loop purple.I also bought a bottle of the X1 ECO UV RED, and that stuff is actually red.

I've used Mayhems in the past. Specifically the nuke line. The Dye in the X1 eco is really poor and fades in less than 24 hours.

It's like someone filled the bottle with something else other than coolant. It's gross, and I have to pay return shipping. I then bought Corsair xl8 UV green because it's real and not sketchy like this junk.