Blue/Black limestone

[Dextraneous]

I've having my patio done using blue/black limestone slabs. I have two questions:

1/. Can anyone recommend a suitable sealer?

2/. Can anyone recommend a suitable joint filler (we'd prefer something black)?

Thanks in anticipation

 

[r896neo]

For the pointing you need to use a premixed product as simple dye in mortar doesn't last long at all.

Your options would be either marshalls weatherpoint or the slightly higher performance 2 part resin mortars like gtfk, nexus or rompox d1

As for the sealer check on tony's brilliant and impartial test on the paving expert website

http://www.pavingexpert.com/stonpv05.htm