Bruce Hall wrote:
I would very much like your opinions please, about a product called
Silirub HT N, a high-temperature resistant silicone sealant, and also
to know if in principle it would be suitable for the following
application. The product is sold by AB Sealants and is described at
http://www.absealants.co.uk/category...t-Silicone.htm
I have had 10 swivelling halogen spotlights fitted in the kitchen
ceiling of my bungalow. Unfortunately, this has created significant
airways to and from my loft above. As I never use the swivel function
(the lamps are always in the “straight ahead” position) I would like
to seal the 3mm gap between the lamp-holder and the unit, to stop
draughts and heat loss into the loft.
The 50w 12v halogen spotlight bulbs generate a good deal of heat, so I
am looking for a silicone sealant which will withstand it. There is
plenty of ventilation into the loft from the back of the unit to allow
for heat dissipation.
I have approached the lamp manufacturer who can see no problem with my
proposal, apart from possible invalidation of the guarantee, which has
expired anyway. But what do you learned guys think?

Thank you

Bruce

Rather than seal them as you suggest, why not fit fire hoods above each
fitting.
The hood would then provide the draught-proofing.
It would also have the added benefit of doing what it was intended to
do. I.e preventing your loft catching fire! :-)

A