I am interested in the new system with the heated urethane and believe it is Sikaflex with a 2 tube heater and think all mobiles are coming to this system with dual air-bagged cars. I tell most of my customers they need a minimum of 4 hours to a drive away point. I don't feel comfortable with this method and need to change to this style installations.   Guiel Auto Glass

Ultrafast 2 is a great product for those cold days. I used it in New York area and it worked like Ultra on a hot humid day, but I have not tried it for summer use. John

The product we are using is the Sikatack Ultrafast 2. It does have to be heated and it can be used down to 15 degree's for a vehicle with one air bag the drive time is one hour. For a vehicle with dual airbags the drive time is two hours. It is a bit more expensive but in my opinion well worth it. It does require activator to be applied to the glass above forty degrees and to dry for ten minutes prior to installation.  ws guy

SikaTackPlus Booster is the best choice if you want a fast curing stuff. The only problem can be that it sometimes cures too fast. However it's well worth the price.  Karl M.

That was the problem I/we were having doing a job with push in moldings etc. I liked the speed of drive away times but i would much rather use the ultra 2 given its not a major difference. I do however keep both products in my van just in case the drive time is an issue late mobile etc).  ws guy

I'm probably going to get blasted, but most push-in moldings are a joke. You're better off using 16mm foreign or domestic universal molding for most of those jobs. Essex moldings, in my opinion, are the most flexible in all weather conditions. Second, Ultrafast II is better than Sika Tack plus Booster, because the screw on attachment to the caulk tube is a joke. (a mini-tube of chemical booster screws on to a small tube of urethane, then you screw the cap on the mini-tube and gun out like regular.

 XXXXX-XXX--- That's your basic shape of a Sika Booster tube with the X's. The reason that it is a joke is because there is no way one tube of urethane can push through another mini-tube and mix evenly, so you may have some booster in some spots and not in others. The twin-tube side-by-sides like Essex have a little mixing wheel that spins them together as they come out evenly. This makes sense. I've never used it, myself, but mixing evenly as it evenly comes out is the only way that could possibly work right, unless, of course, you are using the pre-mixed, ready-to-heat Ultrafast II, my choice of Urethane.  Washington

I agree with most of that. I do prefer the ultra2 oven. As far as the moldings, the 16 mm and 20 mm work great for a lot of vehicles but I'm referring to w/s like W926, F724, F2059 etc. that it isn't an option unless its hacked and converted to universal. I hate to use booster but I do if the drive time is a factor.  ws guy 747

I've never used Sika. always an Essex man. 418 then 418hv then Beta216 and now 208. Works great and always consistent. glassgod

I don't use U-2 personally. Most ins companies allow less than $20 total for urethane. Two U-2 kits at $13/per equals $26 an install on many vehicles. The booster system is MUCH more than this -- don't know how folks who use it can afford to. I'm happy with the 3M, both in performance and price. Just wish it didn't cure so damned hard!  Crackman