trav sealer | Tiling Advice | TilersForums.com

hi, im looking for some advice on sealer or impregnator for travertine tiles . iv built a stud wall ensuit in a corner of my bedroom, 3 mtres long 1 mtre wide shower one end, bog the other end,. i hacked off the plaster on the 2 original walls to bare the brick and dotted them with 12.5 board and also used 12.5 board on the stud walls, then i primed the entire plasterboard with acrylic primer from topps(some blue stuff) iv tanked and taped the shower area right down on to th tray with bal wp1 grey tanking liquid, iv gave it 3 coats.now im halfway through tiling the walls with 610x406 honed and filled 12mm travertine, im using white cement based bagged adesive (topps own brand) i havent sealed tiles before fixing and all is well at minute(touch wood). now my question is whats the best thing to do regarding sealing/impregnating? because there is so much conflicting advice about its made me unsure. also sealing and impregnator are they 2 different things or the same? cheers