uba tuba

Hi there

We just had uba tuba installed in our kitchen for countertops.  Although the fabricator told us it was sealed, we are already noticing stains on the surface.  This type of granite is new to us and does seem to be porous.  What can we do?  What type of sealer or protective coating should be used to prevent this.  Also it appears some of the sealer they applied in our house stained the joints from the backsplash to the countertop.  Please help. 

Thanks  Guy