Which Silicon for stone?

[seamonkey]

Hello ,
have just been told that For stone you must use a neutral curing mastic, apparently the acids in normal brand mastics can react with natural stone. Can anyone recommend a good brand which fits the bill? I usually use Mapei's mastic as they offer an excellent colour match does anyone know if this is neutral curing ????

 

[DHTiling]

I use Mapei silicones... It is solvent free..as this is what can bleed into certain stones..

 

[seamonkey]

Thanks Dave, thought it was ok but always good to pick your brains for piece of mind.