Using AGER To Darken Granite Countertop Edges
We recently had granite countertops installed in our kitchen...Santa Cecilia...The stone has a beautiful golden hue...
We were disappointed to see after the installation that the edges appear much lighter/whiter than the rest of the stone.
We had read that some stones are treated with a protective agent prior to shipment and when they are cut during fabrication the true color is revealed.
The fabricator should have treated the edges with an AGER product to darken them prior to the polish and seal process.
Our installer did come out to the house to apply this product after the project was completed, but it was not effective. Is there a way to darken the edges after the edges have been sealed?
True, some stones and granite countertops are "resined" to fill imperfections and to better bind the stone prior to polishing and transport, etc.
This resin will darken the granite slab color some. The slab is then cut for installation. The edges of the cut slab must be polished to match the top surface finish.
However, since the top has resin on it and the edges do not the edge color won't match the top color even after polishing the edges.
Note that the polishing process will bring out the color making it deeper and darker by changing the way light reflects off the surface.
So, a polished surface always has a deeper/darker color than the "natural" color of the granite, which can always be seen by simply looking at the underside of a granite countertop or on the non-finished side of any stone slab.
But if any "enhancing" product, or resin was applied to the surface, then yes... it would need to be applied to the cut edges as well or they will be a different color than the granite countertop.
Of course, the
same resin that was applied to the slab at the factory is not available during installation, so some other type of color-enhancer must be used to try and match the edges.
Most color-enhancing sealers are designed to be applied to a honed surface to darken the color. Typical color-enhancing sealers are not meant to be applied to a polished surface, although, sometimes experimenting can yield a match of the edges with the top surface.
However, the Tenax "Ager" product is more versatile. It works like other color-enhancers and can be applied to honed stone surfaces, but it also has proven to be effective on polished surfaces.
Ager is often used to match the edge color to the top surface color of polished granite countertops that have been resined. It is applied after
polishing the edges, but before
any other sealer is applied.
A color-enhancing sealer must applied before
a standard impregnating sealer is applied, otherwise the enhancer / Ager won't absorb well or at all.
Since the sealer has already been applied, you could try stripping the sealer off the edges using methylene chloride. If not possible or not as effective as needed, then really your only remaining option is to grind the edges a bit to expose some raw granite and start over.
First, polish the edges, then apply the Ager using as many coats as needed to get the best color-match to the countertop surface.
A standard impregnating sealer is often applied over a color-enhancing sealer as enhancers are not typically great sealers and are used primarily to darken color. But recall the majority of enhancers are used on honed stone which is more porous than polished stone requiring better sealing.
However, on edges the risk of staining is near zero, so applying the Ager (and no other sealer over it) will be more than sufficient.