Ceramic Varnish

[bazzard]

Would like clear varnish for ceramic coasters, guaranteed not to melt when coffee cup with boiling water contained in it is left on it. Only a small amount is needed. Advice please.

[melv16]

A water based clear varnish should do the job.

[bazzard]

A varnish has already been used on coasters that I bought, but it does not seem to withstand the heat from a hot mug - it might just be waterproof

[Khandro]

Why on earth do you want to varnish ceramic? depending on how it was fired it is one of the hardest surfaces you can have, no varnish is harder.

[bazzard]

The ceramic tile has been covered with something that looks like wrapping paper and the shop bought varnish coating has melted on use with a hot drink

[Bertrum]

You could try something like Rust-Oleum
Amazon.co.uk User Recommendation

[bazzard]

Rustoleum - sounds interesting. I wonder if anyone has tried it on a paper covered ceramic tile. Thank you to the people who have contributed to this post.

[The Builder]

A hard flooring-type varnish should do it. That stuff is bomb-proof.

[bazzard]

Will the floor varnish withstand heat?

[Khandro]

So really you're not covering ceramic tiles the surface you are covering is actually paper?

[Flonska]

Not promoting any brand but this stuff appears to be heat resistant:-

http://polyvine.com/index.php/en/varnishes/water-based-varnishes/heavy-duty-floor-varnish

I guess it would be a case of seeing whatever one you choose does what it says on the tin? Your local hardware place should be able to advise!