Valerie,
The grout can be bought at any DIY shop, even sengsiong, ntuc, carrefour sells it. Very cheap, around $3 per pack. The sealer can try the DIY shop at Jurong Point basement. Not very cheap.. hehe. But you need a float to do the grouting, i cannot find it anywhere.. Hope justin can tell me where he bought his, unless he uses a normal plank to press it down. heh
I also want to ask you if you had tried your teka hob already? Apparently, when i tried to put the wok on top of the wok stand, the four claws holding the wok is not well balance so the wok kind of wobble left and right ... even the left grid of the 3 grid piece, i try to put my saucepan it is not balance with a little bit wobbling. It is defective or i didn't place the grid well? LOL, maybe i should go back today and try again.