Somedays its just seems to be one thing after another since we moved
into this new house. We had heavy rain last night and found the
conservatory was leaking. Fortunatly it has a tile floor so no damage.
It looks like some of the external rubber beading on the perspex roof
has shrunk a bit (the conservatory is over 10 years old). I was going
to fill the likely suspect areas with a couple of runs of clear silicon
sealant. Is this the correct stuff to use? I noticed that unibond make
a specific black coloured gutter sealant. Would this be any better or
is it just black silicon?

Thanks,
Matthew

Matthew wrote:
Somedays its just seems to be one thing after another since we moved
into this new house. We had heavy rain last night and found the
conservatory was leaking. Fortunatly it has a tile floor so no damage.
It looks like some of the external rubber beading on the perspex roof
has shrunk a bit (the conservatory is over 10 years old). I was going
to fill the likely suspect areas with a couple of runs of clear silicon
sealant. Is this the correct stuff to use? I noticed that unibond make
a specific black coloured gutter sealant. Would this be any better or
is it just black silicon?


It's a bituminous, non-setting gloop. In some ways, it is superior to
silicone in this type of application, because it stays put for a very
long time. But it can't be smoothed down to a nice even finish as well
as silicone.



--
Grunff

Grunff wrote in message ...
Matthew wrote:
Somedays its just seems to be one thing after another since we moved
into this new house. We had heavy rain last night and found the
conservatory was leaking. Fortunatly it has a tile floor so no damage.
It looks like some of the external rubber beading on the perspex roof
has shrunk a bit (the conservatory is over 10 years old). I was going
to fill the likely suspect areas with a couple of runs of clear silicon
sealant. Is this the correct stuff to use? I noticed that unibond make
a specific black coloured gutter sealant. Would this be any better or
is it just black silicon?


It's a bituminous, non-setting gloop. In some ways, it is superior to
silicone in this type of application, because it stays put for a very
long time. But it can't be smoothed down to a nice even finish as well
as silicone.



--
Grunff

The stuff I've got also says dont use on plastic (guttering!!) so it has
stayed unused in the garage. Should be Ok on aluminium/glass joints but not
on polycarbonate or UPVC.

Bob

Dont use silicone to seal water out. It will look good but wont hold
the water out.
The tar is a much better option and you can buy in in a tube and apply
like silicone carefully with a very small sharp cut, under the rubber
seal, when bone dry and clean. It will last years. Do it in sunshine
when the rubber will be soft.
When silicone hardens the water will get under it and become unsightly
and you will pull it out like a rubber band next year when you return
to repair it.