Tempil (60ml, 399 C/750 F) - 24423 aq TL750 Temperature Indicating Liquid, 399C/750F, 60ml

Works as advertised.

Great product for brass annealing set up to make sure your temperature is in the correct zone.

Just what I needed to gauge heating time for annealing brass. As advertised. Easy to use.

I use it to set the time required for properly annealing case necks. Paint it inside the neck and let it dry. Once in the annealer it will go to liquid as soon as temp is reached. Once the settings are correct I make the run. Only a little is needed for the set up. The bottle will last a long time for this purpose. Make sure to shake it well to mix it before applying.

Used it to try to judge how much to heat my 7mm rm brass. Used it on two pieces of brass to get the idea what I was looking for as I was using a drill 5/8 spark plug socket ( I think that was the size) and a propane torch. Found if I turned the lights off I could judge well enough without it ( light red ) and repeat.