Filling gap in kitchen top?

[VictorDelta]

Our kitchen has a working surface made of a material designed to look like polished black granite with some flecks in it. It has a couple of joins in it from which some of the filler material has now disappeared (the surface is rock solid so it is not due to movement).

I am very keen to fill the resultant gaps (about 1-2mm wide) but despite much searching (in shops and online) cannot find the right product to do this.

A kitchen shop offered to send someone round to do it but it was going to cost around £200!

Can anyone recommend a DIY solution please?

Thanks.

 

[foxhole]

http://www.ebay.co.uk/itm/like/2308...1=ICEP3.0.0-L&ff12=67&ff13=80&ff14=108&ff19=0

 

[gregers]

ive stopped using colorfil,
im now using this stuff.
http://www.youtube.com/watch?v=ab23sDHhUfE
very easy to use and cleans up using bog standard white spirit.

 

[VictorDelta]

Thanks for both suggestions. Their websites suggest they are designed to work with laminate worktops. Would they also be ok with composite material ones?