need to seal Labrador Antique?

need to seal Labrador Antique? Images

need to seal Labrador Antique?

need to seal Labrador Antique? Description

PLEASE, PLEASE, NEED HELP RIGHT AWAY!  IS IT NECESSARY TO SEAL LABRADOR ANTIQUE GRANITE?  The folks who will be installing this Material (http://g654.org) on my bath tub deck and (http://maplered.com) Counter (http://GialloFiorito.com) tops say they will be sealing it but I am not sure if this should be done.  It is very hard for me to get information which is not conflicting on this Stone (http://g603.net) .  Other than it appears to come from Norway (my installer thought it came from India).  How dense is this Stone (http://g603.net) ?  Any other information about it will be most appreciated!
Thanks!  Marge  

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