This is the fluid for a build that gets shot. Solid, saturated colour reads consistently under studio light in a way a translucent dyed fluid never does, because there is no depth-dependent colour shift, a 16 mm tube and a full reservoir show the same colour.
· Opaque Pre-Mix
Pre-mix · Opaque · Show coolant
Opaque Pre-Mix
Solid, non-transparent showcase coolant. Multiple colours, PrimoPrep included.
PrepSysPrep, then PrimoPrep
32ozStraight from the bottle
<8hPump time a day
Buy Opaque Pre-Mix$24.99
24 colours3 of them UV reactive
PrimoPrep2 oz included in the box
2 yearsShelf life, unopened
No water, everTop up with Opaque Pre-Mix only
01
Why pump hours matter
The colour lasts as long as the suspension does, and pump hours wear it down, not the calendar.
0 h8 h a day24 h
Under 8 hours a day
The design limit. Turn the system off when it is not in use. The less it runs, the longer a fill lasts.
Past 8 hours, every day
This is a show coolant, not a daily driver. Every extra hour drops the suspension faster, and a loop run hard every day can wear a fill out in weeks.
It lasts as long as it lastsPump hours, how well the loop was prepped, and how much air is out of the system decide it. Plan around six months, not twelve.
Pump speedRun it as slow as your thermals allow. Higher flow shears the suspension apart faster.
Early onCheck daily for colour separation in the first weeks.
02
Pick a colour
Swipe to see all 24 colours →
- Sky Blue SX
- PrimoChill Blue SX
- Powder Blue
- Steel Blue
- Cobalt
- Razor Red SX
- Powder Red
- Crimson
- Blood Orange
- Sun Orange
- Candy Gold SX
- Yellow
- Toxic Candy
- UV Green SX
- UV NV Green
- UV Green
- Pink SX
- Candy Pink SX
- Candy Purple SX
- Violet
- Black Cherry Violet
- Sterling Silver
- Gray
- Sky White SX
Swatches are on-screen approximations, not a physical colour sample.Switching colours later? Run a System Reboot first.
03
Get it in the loop in five steps
- 1
Tear down and clean
Every surface cleaned before anything goes in.
- 2
SysPrep, then flush
Strips the machining oil and flux that break a suspension.
- 3
PrimoPrep, then flush
The 2 oz bottle in the box conditions the loop for the fill.
- 4
Fill and bleed 24 h
Pour Opaque Pre-Mix straight in. Bleed until no air is left in the loop.
- 5
Inspect on day 3
A strand or thin colour this early means a prep gap, not bad fluid.
04
What it goes into, and how a fill ages
✓Use with
- Copper, brass, nickel-plated copperThe metals Opaque Pre-Mix is formulated for.
- Acrylic, PETG, PVC, glass tubingFully compatible, soft or hard line.
- More Opaque Pre-Mix, for top-upsThe only thing that goes in after the fill.
✕Never with
- Water, for any reasonEven a top-off thins the pigment and the inhibitors.
- Dyes, biocides, kill coils, other brandsAnything added breaks the suspension's balance.
- Aluminum, silver, or silver-plated partsCorrosion, and they break the suspension down.
Day 1
Fill and bleed24 hours with the pump running. Check every fitting twice.
Day 3
First inspectionTorch on the reservoir. Strands or a film mean the prep was short.
1 month
CheckupTop up with Opaque Pre-Mix. Compare the colour with day one.
When it drops
Drain and serviceThinning, settling or film on the acrylic. Plan around six months.
05
The full story
06
