[Greg Reid]

Originally Posted by 78w72

but he has a industrial type caulk gun, not your average residential type..

Was that a manual caulk gun or electric? I literally bent the squeeze trigger on mine. Ran out and got another one and it did the same thing. That stuff was like trying to squeeze mortar through a half inch hole. The glass guy had a heated holder that he left the tubes in until the urethane was hot enough. Flowed right out then.

[78w72]

Originally Posted by Greg Reid

Was that a manual caulk gun or electric? I literally bent the squeeze trigger on mine. Ran out and got another one and it did the same thing. That stuff was like trying to squeeze mortar through a half inch hole. The glass guy had a heated holder that he left the tubes in until the urethane was hot enough. Flowed right out then.

actually the first 2 times he did mine it was manual & probably 2-3 times as beefy as one you'd run out & get from home depot, & he would have used that probably hundreds of times doing this. the most recent one he did for me was electric. but the trick that made the manual one work fine was how he cuts the tip... its not just a half inch hole, it was a large "V" shape notch probably closer to 1" long that allowed the urethane to flow out much more freely & in the shape of a tall thin wall.

when i did the back glass i just used a normal cheap caulk gun with about a 3/8" hole & it came out pretty easy, harder than normal silicone window caulk but far from mortar & the gun was fine afterwards. im sure pros in a shop use a heated gun when they do it all day long, but this guy that does mobile service did fine with a manual one.