Identical concentrate and chemistry to standard Rad Clean, packaged with two plastic fittings and o-rings plus a threaded funnel, useful if your radiator does not already have PrimoChill-compatible fill ports to cap it with while it works. No gloves or goggles required. Safe on the internal metals found in radiators only.
· Rad Clean — Full Kit
Radiator flush · Fittings included
Rad Clean — Full Kit
The same radiator flush, bundled with the fittings and funnel to run it.
½Half a bottle, 1 oz
32ozDistilled, RO or DI
1hFlip at 30 minutes
Buy the Rad Clean kit$14.99
In the box2 fittings, o-rings and a funnel
Up to 8Radiators per bottle
Reuse the batchDrain it into the next radiator
Never in a loopRadiators only, off the loop
01
Why radiators get their own flush
Brazing flux and solder debris ship inside every radiator. Three hot-water passes will never reach them.
Hot water first
Three passesShake 60 seconds in every axis, drain, repeat until clear.
Then Rad Clean
One hourFill completely, cap, shake, flip at 30 minutes.
Then SysPrep
On the first fillThe radiator is bare metal now. Condition it with the loop.
02
Use it in five steps
- 1
Cap with the kit fittings
The plastic fittings and o-rings in the box seal the ports.
- 2
Three hot distilled passes
A third full, shake 60 s in every axis, drain, repeat.
- 3
Mix and fill
Half a bottle into 32 oz of distilled. Fill the radiator completely.
- 4
One hour, flip at 30 min
Shake occasionally so both ends get contact.
- 5
Drain, rinse twice, dry
Then run SysPrep on the first fill.
03
What it works with, at a glance
✓Use with
- Radiators, on their ownOff the loop, never running in it.
- Plastic fill-port capsWith o-rings.
- Distilled, RO or DI water32 oz per half bottle.
✕Never with
- Nickel-plated fittings or partsPlastic caps only while it works.
- Aluminum partsNot compatible.
- Inside a running loopRadiators only.
- 1oz
Per 32 oz
Half the bottle.
- 1h
Run time
Flip at the 30-minute mark.
- 8
Radiators
Per bottle, reusing the batch.
- Stage 1
In the sequence
Before the loop is assembled.
04
The full story
05