Investigating the use of sealers on granite, I
contacted a supplier to the monument industry, who referred us to Tom Robinson, Executive
Vice President of the Elberton Granite Association (EGA). Mr. Robinson advised that EGA
recommends against using sealers on the surfaces of granite to be placed outside, as it
will create problems.
Robinson cautioned, “applying a sealer to the surface of granite has not been
successful. The chemical will never penetrate evenly, and, as a result, the stone will
look blotchy at best and horrible most of the time.” There are exceptions.
Robinson said, “We do endorse putting a sealer on the bottom of your bases and the
joints of your dyes. The product is called ‘joint and bottom sealer,’ [and]
it’s available from any of the local suppliers. It’s clear and goes on easy with
a small paintbrush. It dries in about 20 minutes. Do not apply the sealer to any other
surface. Make sure the sealer is dry before handling in the belts of the crane. If you
don't, you will eventually have a sticky mess.”
Knowing when and when not to use products is an essential part of the monument profession.
If you are not sure what to do, it is better to ask.
