Re-pointing indian stone slabs

[paul243]

Hi
I'm about to repoint/re-joint an area of Indian stone slabs. As I am useless with a trowel, can anyone suggest where I can buy a "masking tool" to help me get the morter in the joint and not all over the stone..seem to remember seeing a plastic sheet with a slit the width of the joint?
Hope this makes sense!?
Thanks

 

[kingandy2nd]

Perhaps a better option

http://www.screwfix.com/p/p-c-cox-ultrapoint-pointing-grouting-gun/79243

 

[WabbitPoo]

dont make mortar too wet, and you'll have no trouble with staining.

 

[paul243]

Thanks,
Should the joints be damp before filling?

 

[noseall]

Thanks,
Should the joints be damp before filling?

Yes always.