WHAT IT IS FOR:
Greening of block test fluid after a while is a common problem because it is sensitive to co2, more air in the bottle, faster time of the degradation of the fluid.
SLE-210 SHELF LIFE EXTENDER simply extends the shelf life of your block test fluid. Just spray a bit of it after each use of the block test fluid. It will force out air from the bottle and replace it with a gas that does not react with the fluid at all. Simple and effective way to extend the shelf life of your test fluid. Save fluid and money.
Works with all DrHeadgasket test fluids, red and blue.