On 01/10/2012 13:07, GMM wrote:
At work, they've been draught-proofing the old windows. It seem that this has involved squirting a big
bead of silicone along each mating surface, then closing the window until it goes off. Good (if
temporary-feeling) idea for some locations as it moulds to the right shape. Once cured, the silicone stays
on the one face.

They didn't do my area, so no chance to find out how it was done, but they must have used some release
agent on the 'uncoated' face for this to work.

Any idea what they might have used as a release agent?


Sounds daft, but silicone is used as a mould release agent.

I can never work out how come silicone sealant is so sticky when
silicone spray is so slippery?

--
Dave - The Medway Handyman www.medwayhandyman.co.uk