Cantera
Q.We have cantera outside out house, which has become stained, mostly greenish/blackish...possibly mold? A contractor gave it a re-surfacing, but the stains remain, and appear to be quite deep...any suggestions?
A.Cantera is a volcanic quartz product that has a porous texture.You will need to do a little research here to solve your problem.Call the folks that sell the cantera stone at 602-971-6611.They will be able to help you.
Because of the mineral composition of this stone it may be prone to etching.You will probably need a mildecide to kill the little buggers.
But you must be careful what products you use as you could damage the stone.TESTING is important unless you can find a stone pro who knows cantera like the back of his hand.
Stu Rosen
Article ID: 1740
Created On: Tue, Mar 10, 2009 at 6:07 PM
Last Updated On: Tue, Mar 10, 2009 at 12:00 AM
Authored by: Stu Rosen [mail@stoneshine.com]
Online URL: https://marblecleaning.org/knowledgebase/article.php?id=1740