How bad are bubbles in acrylic seams?
- Thread starter davis101
- Start date
Plastic measuring cup or any plastic mixing cup works just fine. It does not stick to other plastic and once used you just peal it out of the container super easy.
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Forget that idea, tip and pour with weld 40. 4 and 16 are weak by comparison. They just chemically melt the surface so two pieces hold. 40 is like liquid acrylic and bonds. That's a big tank, with what sounds like already slightly sketchy seams. Tip and pour the seams. Check out the weld on 40 thread. You can order it online
I just did a bit of research on the strengths of the bonds of the three weld ons.
Weld-on 4 2500lbs per square inch
Weld on 16 2000lbs per square inch
Weld on 40 4000lbs per square inch
How is it assumed that 40 is 30X stronger than 4 and 60X stronger than 16?
I calculated the pressure per square inch on my tank (assuming about 5000lbs of pressure all along the bottom seam, although it will probably be less), and it only comes to 250lbs per square inch. Thats with 1/2" acrylic. Now if I add in another 1/2" support around the edges that comes to half of that at 125lbs per square inch.
I don't see why weldon 16 is considered awful to use when the strength of it is far beyond that required, at least for my tank.
Weld-on 4 2500lbs per square inch
Weld on 16 2000lbs per square inch
Weld on 40 4000lbs per square inch
How is it assumed that 40 is 30X stronger than 4 and 60X stronger than 16?
I calculated the pressure per square inch on my tank (assuming about 5000lbs of pressure all along the bottom seam, although it will probably be less), and it only comes to 250lbs per square inch. Thats with 1/2" acrylic. Now if I add in another 1/2" support around the edges that comes to half of that at 125lbs per square inch.
I don't see why weldon 16 is considered awful to use when the strength of it is far beyond that required, at least for my tank.
It's because of the way each adheres. 4 and 16 melt two pieces so they bond. 40 is like a liquid acrylic that bonds and almost becomes one piece.
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You already have the weaker 4/16 holding your seams. the large tank builders I know use 40 for this. I'd take this opportunity to make it as strong as possible by pouring fills of 40 to reinforce. I know you want this done and the other materials are easier to get so you want to settle. You want this build to last.
