[Brent Deines]

The problem with a Mightyvac or any other type of high vacuum equipment designed to be used prior to injecting resin into the break is that unless their is only one crack or chip that reaches the surface of the glass you are simply pulling air into the break from all of the damage that does reach the surface. Even on a simple bullseye, which is typically the only type of break that meets that criteria, the moment the vacuum is released the air is back into the break. Think about it for a minute, if high vacuum was the answer, the dime store syringe and pedestal method would be the best system on the market as they are capable of tremendous amounts of vacuum, and I don't think anyone here will argue that is the case.

If you use too much vacuum once the resin is in the break, you will pull resin right along with the air. Using a lot of vacuum gets a lot of people excited, but there is simply is no science to back all of the claims that are made about it. If you think about it in very simple terms, a brake bleeder (which is all the mightyvac is, will only work if the system is leak free. If you have a leak in the system, you will always introduce more air into the lines.

I'm sure I'll take some grief for this one, but I have spent a great deal of time and money working with engineers who specialize in fluid dynamics to figure out what works and what does not work, and it always comes down to this. If you got all the air out the first time, there would be no need for a second vacuum cycle, and "every" system I have ever seen, and I think I have seen and even tested most of them, recommends a second vacuum cycle.

Whatever system works best for you is the one you should use. I know not everyone will prefer a Delta Kits system, and that is fine, but most people do not hire engineers to evaluate the products they are planning to purchase, so they are unfortunately at the mercy of the equipment suppliers, some of whom are very honest, and some of whom make absolutely ridiculous claims about what the equipment does and how it does it.

The problem is that many windshield repair technicians do not try, or even watch a demonstration of a system prior to purchasing it, so they never have anything to compare with, and most windshield repair technicians never try more than two or three different systems in their entire career. Even if they do, I find that they will try to apply methods taught or learned with one system to another system. You just can't do that with any success, which is why most technicians will swear by the system they learned with unless they have a very open mind and are willing to set aside their pride and are willing to be trained on something completely different.

As I keep saying over and over again, the very best way to compare systems is to see them all in action side by side. The truth is always revealed at that point. Could that be why fewer and fewer manufacturers demonstrate their equipment at trade shows? Just food for thought.