Hi all -

Fitted a stainless steel 'sit-on' kitchen sink onto a cheap B&Q base unit
yesterday. Instructions said to bed it on silicone sealant. I used a tube
of trade Evode window silicone, which had been around for years but
unopened. Tube says quick-skinning, high-adhesion, low-modulus, so it
seemed ideal.

I noticed at the time that there was no vinegary smell, and 24 hrs later the
surface hasn't skinned (in dry area, room temp). So I'm thinking now, was
it out-of-date and if so what does that mean? I'd always assumed that if
left for too long it would cure inside the tube, but this stuff seems to
have lost it's mojo.

Can some kind expert tell me what happens to silicone sealant if it's left
unused for too long?

TIA!