We recently worked on an almost identical project. First removed all old caulk. Next sprayed the steps with D2 Biological solution and then waited a few days for the solution to kill the biological coating. Next cleaned with a neutral stone cleaner using Malish brush on a side by side. Next replaced the old caulk with backer rod and exterior grade caulk. Finally sealed with Aldon SBS Sealer.
From the desk of
Facility Specialists, LLC
15 West Highland Ave. Suite E
Philadelphia, PA 19118
> On Oct 18, 2017, at 2:09 PM, Mike Alston <email@example.com> wrote:
> Good afternoon, historical society has granite steps that are in need of repairs and cleaning. Any ideals on how to approach this would be much appreciated.
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