I have put down a lovely natural slate floor in my conservatory and i am looking for a good Glaze and Seal to bring the colours out,it needs to be able to withstand heat as you can imagine it gets sooo hot in the conservatory...Thanks:)

They have some good tile sealers here-

http://tinyurl.com/6xj9l3z

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DIY | Donnas dream house

try LTP or aquamix for ur sealers have found them second to none for sealers..
best of

All - thanks for the advice and suggested sites. I've now ordered Lithofin Powerclean which i've been told to scrub with a green scourer (gently) to try to remove excess grout and dust trapped behind the sealant. hopefully if this works, ill then be using Lithofin MN stainstop to seal the tiles - and hopefully that will be the end of it. I've been warned though that the catch 22 in all of this is that to really get rid of grout I need an acidic cleaner but using an acidic cleaner will eat my tiles - so hopefully I won't need to go down that route!