The problem with polycarb conservatory roofs is firework night......
Anyway, after a stray rocket punched a hole through 2 of the 3 layers, I
decided the cheapest way to fix it was to glue a patch in place. The
patch I have scrounged, but not the glue, which I think needs to be a
solvent glue given the exposed position. I understand things like
methylene chloride are appropriate, but is there anywhere on the high
street that sells suitable stuff - and is there a trade name to look for?
Mthylene Chlride I don't know, but,..
Methyl Ethyl Ketone = Model aircraft Dope thinners.
Also PVC weld usually. With PVC in it.
Acetone - nail varnish remover.
However I am NOT sure polycarb dissolves in anything..maybe silicone is
On Mon, 07 Jan 2008 23:44:42 +0000, The Natural Philosopher
There was a similar thread a week or so ago about welding Acrylics.
From what I remember of the trade films they showed at school there is
a big difference in the results if the best solvents and techniques
are used, Viz Re: acrylics chloroform was the solvent of choice
permitting crystal clear joints to be made in Perspex. That's from an
ICI film. Seems to me it would be worth the cost of a telephone to the
tech support dept of your favourite manufacturer of polycarbonate
As an alternative if it was (someone elses) Bonfire Night rocket
could there be a better subject for an insurance claim?
In article ,
Derek Geldard writes:
The "glue" for perspex is Tensol Cement, which is perspex
dissoved in chloroform. Dad had a can of it which still
worked OK a few years ago, in spite of the label on it
which said "Use before Aug 1969".
Superglue works quite well as a solvent weld too, as the
solvent dissolves perspex.
Don't know if either would work on polycarbonate though.
You could try this place which sells dichloromethane as an adhesive for
the acrylic adhesives on that page (Tensol) are not suitable for
polycarbonate. You must make sure both surfaces are clean and dry,
difficult to do for a conservatory roof, since rain often has a lot of
greasy hydrocarbons in it.
Thought of that one. But three weeks after the fact, it would have been
a bit difficult to prove to an insco's satisfaction whose rocket it was.
/Much/ easier just to patch it up. If I can get the glue :-)
Looks like westward are a possibility (thanks SF), if they'll sell small
amounts. I do wonder if the stuff can be posted though!
In article , The Natural
Methylene chloride, otherwise known as dichloromethane, Cl.CH2.Cl
(although it's obviously not a chiral molecule), Me.Cl2, DCM. The dominant
factor in the molecule's construction is the high electronegativity of the
chlorines creating a strong dipole.
The last time I looked at or smelled PVCweld, it contained DCM/ MeCl2. If
it does, and it's *fumes* are capable of misting the surface of a piece of
polycarbonate, then you can distill the DCM out of the PVCweld. IIRC the
boiling point of DCM is around 35 Centigrade, so you'll need to be packing
you receiver in ice, or doing the distillation in the fridge. Depends on
what equipment you have to hand.
Both have a dipole due to the electronegativity of a single oxygen atom,
and both have the positive end of the dipole dispersed into a C2-long
chain, which reduces the gradient of the charge separation. I don't recall
acetone as having any effect on most clear plastics ; I don't know about
May well be. It's quite possible that a "polycarbonate" is actually a
copolymer with something else, and that down at the molecular level you
can weld the two items by solvent-welding the second polymer.
Going back to the original question - didn't NitroMors paint stripper
It should be showing 6 different sizes of 'Hi-Tack Flashing strip' and
Primer to match. This is probably their own-brand version of 'Evostik
Flashband' which is a self-adhesive roof repair flashing / bandage. It can
be cut to any shape / size for roof repairs and will stick to almost
anything either as flashing or as a patch. I used it on a polycarbonate
shed roof several years ago and it's still waterproof.
If you can't find it from my reference try googling for 'Evostik
Flashband' which should produce a result.
Shouldn't be a problem. The most difficult things for postage are
flammables and explosives (and carbide, which produces flammables when it
gets wet). Methylene chloride/ DCM has been used in the past as the active
ingredient in fire extinguishers - it's decidedly unflammable.
It would need appropriate packaging, but that's not difficult.
from cynic contains these words:
It's generally unwise to claim off insurance if your claim is less than
If you claim then
1. Your name will be put on a list of claimants which is circulated
around other insurance companies
2. Your are likely to see a premium increase and/or excess and/or
exclusions when your policy comes up for renewal, or to receive no
invitation to renew
3. You are liable to find it difficult to get insurance on reasonable
terms from other companies