Since it is not water based the specific heat it can absorb and release will be less than a product mixed with water. That is for a given coolant flow.

Really a good functional normal system does not need this product. I am not against the product. Still I would only personally consider it under very limited circumstances. I suspect they want the bleed hole closed on the water pump because the molecular size of the of the product is smaller than the poison type glycol I think but an not certain of..

For example you can have a car on straight water with no leaks. Remove and add a mix of fifty percent water and regular anti freeze and you may see leaks. The molecular size of anti freeze must be smaller than water or they slide easier. I an not certain of the term to use for slide easier.

An example is in order. Back in the day of my 300.00 immaculate 50 mercury. I purchased it in the spring. It had water as coolant. In the late fall I replaced it with the standard protective mix. Both water pumps started leaking almost immediately. Ford product flatheads had two water pumps that doubled as motor mounts If I remember. I still have one in the garage but the three mentioned cars are long ago.

If that car was not bad enough pricewise by todays standards. My 39 ford for 125.00 with 20K on it. Or my 47 ford with 27 k for 140.00. No kidding guys and all three needed nothing except the 48 ford needed a new muffler and pipe. The cost back then was 27 dollars for parts and labor at a muffler shop.

Things have changed a little it seems or it is my imagination. Back then nobody or very few liked really older cars much but I did and sought good examples out. It was in a time frame that the prestige of what was driven seemed more important than it does today. If you did not drive a new or almost new car was a downer.