Following are a number of frequently asked questions
and their answers. Answers are typically based on actual
Q: I'm trying to find out at what pressure my bottle will
burst, but I can't find it here, where can I find out?
A: Even though you may not have an identical bottle to
the ones presented here, you can usually find a close match to
it and get a general idea of the burst pressure. The burst
pressure is mostly affected by bottle diameter, material type
and wall thickness. Look for a bottle
of the same capacity and diameter. If your bottle is made of the
same material and weights approximately the same as the closest
matching bottle, then it is also likely to burst at around the
There is of course no substitute for the actual test with your
particular bottle, but it can be used as a guide when deciding
which bottles to use. If you don't have the right equipment, you can
submit a request to
find out the burst pressure.
Q: What's the best glue to use for
A: Assuming you are using PET bottles to build your
splices, the best glues are polyurethane (PU) based. There
are three main properties to look for in a glue to be used for
a) PET adhesion - The glue should bond well to PET plastic.
b) Flexible bond - The cured glue should remain slightly
flexible to allow the bottles to expand without cracking.
c) Porosity - The glue should not be too porous otherwise leaks
may develop in the splice.
As with most glues, bottle preparation is also important to
ensure highest possible adhesion of the glue to the substrate.
This means the bottle needs to be clean and free of grease.
Lightly sanding the surface can also improve better bond
The best glue so far that has been used for splicing is
PL Premium, however,
this is only available in the US. PL is slightly porous, but has
very good adhesion and strength properties.