Stonemarket radiance on concrete?

[zonker]

I am planning to get Radiance sandstone laid over a concrete base but am getting conflicting advice re using a unibond tile adhesive or a white cement mortar. any precise recommendations please of good products to lay it on and what to joint with?
My builder wants to use unibond, but I am concerned re staining, how long it would last, and cracks if the adhesive is not very evenly applied..

i would appreciate response ASAP.
cheers,
zonker

[Tony McC]

You MUST follow the advice given by Stonemarket, otherwise they won't accept any responsibility if you get staining in a few weeks time.

I'm not 100% sure about the Radiance, but I suspect that is one of the products they are now saying should be laid on silver sand/white cement mortar, and NOWT ELSE!

[zonker]

Many thanks, will do!
Any advice on jointing this sort of stuff please?
stonemarket say damp mortar with a 1 cement:4 sand ratio and that 'bonded sands' (whatever they are) are not recommended. How do you avoid the mortar marking the stone?
regards,
zonker

[seanandruby]

stonemarket say damp mortar with a 1 cement:4 sand ratio and that 'bonded sands' (whatever they are) are not recommended. How do you avoid the mortar marking the stone?

"Bonded sands" are used in die casting in foundrys. they are oil based silica sands.

[Tony McC]

I suspect that, in this case, bonded sands means polymerics. I can't understand why, unless it's because Stonemarket don't (yet) have their own branded polymeric.

If a good quality polymeric was used, I can't foresee any problems.