caulking where tile meets bath

[xytreme]

I have just finished tiling the bathroom and would like some advice about caulking over where the tiles meet the bathtub.

I bought the caulking strip from focus and basically just stick them on the tiles and then the bath. My concern is that in between the tiles (grout line) there is a small indentation and I can't get the strip to stick very well in between. Is this ok though ? or while water slip though.

I wonder if the adhesive on the caulking strip are water proof as well ?

Thanks for reading. If it helps I will post some pictures

 

[kirkgas]

you will get a better seal using good qualty silicone

 

[xytreme]

i would have prefered silicon caulk but the developer used this plastic bit which curled outward and downward. The bath has sunk a little and there is a reasonably large gap which I think will be difficult to cover with the silicon, but given that I have now placed a caulking strip, will that be sufficient ?