Silestone Countertop Surface Damage
I got bleach on my Silestone countertop and it took off the luster in the area that came into contact with the bleach.
The area also seems more susceptible to stains now.
Is there a sealer that can be used to restore the finish?
Sounds like the bleach has damaged the surface finish of the Silestone or possibly affected the binding resin.
Bleach and several other cleaners and chemicals will cause damage to the finish and spots of discoloration.
Often this damage is permanent.
A sealer has nothing to do with the polish. Applying a standard stone sealer won't restore the shine.
Also, Silestone countertops
like all other quartz countertops do not need sealing and a sealer should not be applied.
It's possible a permanent topical coating would help, but such coatings have their own problems, maintenance requirements, and are rather expensive to have applied.
I'd call Silestone and see what they recommend. All Silestone is polished at the factory, so they will have the best info on what needs to be done.
The lighter Silestone countertop colors seem to be more susceptible to staining and damage for some reason unknown to me.
You should be able to get it re-polished, but it will take a pro to do it. Consult Silestone first.