Stone sealer for slate mosaic table
We've recently bought a mosaic table for our garden (www.europaleisure.co.uk/2011/12/durango-firepit/ - a bit pricey, but a beautiful item, and barbecuing your dinner at the table is great fun) - the surface material is listed by the manufacturer as 'natural slate', set on a metal base plate with some sort of grainy cement. The manufacturer says that although the table is weatherproof, it should be brought indoors over the winter as it is not frost-resistant; we really don't have room indoors to do this, however, so I'm looking for a stone sealer for it, particularly to protect against frost. Can anybody recommend one? nanoShell Stone looks quite snazzy, but I can't find any reviews of it online; does anyone have any experience with it?