I'm using Weld-on 16 in a tube to glue the seem from my skimmer flange to the funnel I made. After it sets for a few minutes it starts to sho air bubbles in the glued seem.
How do I apply this so I don't trap any air?
thanks,
Bill
IME weld on 16 always leaves air bubbles. it has to do with the amount it shrinks when drying. i use weld on 4 for butt joints, then reinforce the joint with a fillet of weld on 16. it may not look that great, but it is strong and water tight.
The seam was tricky since it was a circle for starters and then at an angle. I used Weld-on 4 to start out with but I didn't have the pieces perfectly matches up so there was a bit of a gap in one spot so I went over it with a bead of Weld-on 16. Like Twenty said it doesn't look the greatest but I think I finally got a good enough seal to be watertight.
I think next time I'll use Weld-on 40 for anything like this.
You can use a needle applicator just like Weld-on 3 and 4. Just make sure it is the right gauge needle.
I think Ridout Platics suggests a 64 gauge needle for Weld-on 40but I might be off.
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