Does anyone know whether acrylic is totally impervious to water please?
I believe it is....
Reason for the question is that caravans use two panels sealed together
as a form of double glazing, not fully sealed, they have a pair of
removable bungs. The problem is that under certain contains moisture
trapped between the panels can condense out on the inner or outer pane
causing misting. One suggestion is to remove the bungs on a warm dry
day, then re-seal after venting. Another suggestion is that any
moisture can migrate through the acrylic panel anyway, so removing the
bungs is a waste of effort.
Not totally. It will slowly absorb some water, gaining about 1% in
weight after a month of total immersion.
Take the bung out. Thin acrylics, such as floor sealants and paints,
have a certain amount of permeability to water vapour. Acrylic glazing
sheet can be considered as essentially impervious. The people who think
it is migrating have a leak somewhere.
Actually you should remove them on a _cold_ dry day, which is when the
absolute humidity is lowest. Applying a hair-drier to the sheet might
A warm dry day can have a surprising amount of water in the air - which
is why you get all that condensation. You know, the big white fluffy
things in the sky?
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