XSPC EC6 High Performance Premix PC Coolant, Opaque, 1000 mL, UV Blue

Started using this around 2018/2019 and now have used it in two machines. And I moved and didnt get a chance to change fluids in my rig for more than a year and didnt have growth or coloring of PETG tubing. Stuff works great and the green glows in black light really well (which also helps detect leaks)

Product is great quality, no growth in my loop, and as you'll notice all the reviews are positive. Except for the occasional numbskulls. For uv, it still glows after 7 months pretty well. But just as an opaque blue it's very nice.I plan to upload my cleaning picks after this first year for real results.

A nice light blue opaque or pastel blue, flip the uv lights on and it glows. It does fade over time just a tad, but what I love about this coolant is it does not gunk up on my parts. Gonna be my go to brand for pastels and opaque colors. If you really want your coolant to pop grab a 15 ml bottle of dye uv blue and add a few drops when the color does not glow as much under uv.

It exactly what I wanted it to do.. pricey at $27 but that's what you pay for quality and not some cheap crap. It did stain my fingers/hands but that's kinda to be expected. Cleaned easily off tubing..etc Will do an update to see how it holds after some time.

Love the way it glows under black light. I added a couple UV light strips in my case. My only complaint would be that the bottle doesn't have any way to make the tranfer of this coolant into the small holes of the system very easy. i had to rig a gatorade bottle with a fitting and that still leaked some but that isn't the coolant company's fault. Still, they know we have to pour this stuff into a 1/2" hole so it would be nice if they had a spout or tube or something like some other makers have.

I'm using this in a DIY cooling system on my cnc router which is very similar to computer cooling. But instead of cooling a processor, I'm cooling a spindle motor. Before this I tried normal automotive anti-freeze which was better than water, but I noticed mold growing after about 6 months. So far, this seems to be about the same cooling wise as the anti-freeze so I can't give it any higher marks for that, but it should inhibit the mold growth better. Color is very bright.

Tried a few other brands that claimed uv reactive coolant. this is the only one out of three I tried that actually worked as described. cooling properties seem as good as the others. I currently only have uv led's in my reservoir and no added uv led near the tubing. I will be adding some as hooking up a uv led to a battery yielded twice the amount of glow through the tubing. looks like I have some soldering to do. the tubing glow is from the light from the fans only.Happy with the cooling performance and just trilled with the level of uv reactivity. will recommend this productI will update tis post of I see the color or glow change or if I see it gunking up any of my blocks

If you just remove and only do a rinse of your system it can remain and destroy your pump as like a hard enamel, make sure you wash out your system