Hi, I work on a nature reserve and this year we created a human sunclock.  The points of the clock are round concrete tiles inlaid with glass mosiac pieces.  This has worked well for a few months but it has become clear that the tiles need some protection as the mosiac pieces are being to fall out.  I therefore have two questions:

1     What would be a good resin to coat/layer the tiles with that has good UV resistance?

2     What quantity of resin would you suggest to coat 28 x 8" tiles?

Many thanks  :-)