Coolant temps hitting the red on track, any remedies?

[Estoril]

So what I've decided on is a DI/Coolant Mix + water wetter, and a radiator deep cleaning. Will report results back after my next event at Laguna in about 7~ weeks, and then that's pretty much it for this year.

Full cooling system refresh is on the radar for next year.

I would skip the coolant and just go distilled and WW +cleaning. Make sure you get a good flush (buy extra distilled H2O).