I agree I don’t believe in sealing exterior stone also I’ve seen numerous failures were stone has been sealed outdoors

On Mon, Dec 4, 2017 at 10:35 AM Nicinski <mail@rocklandstonerestoration.com> wrote:
Exterior stone will absorb moisture from the ground as well as from the air and i personally dont believe in sealing outdoor stone because if its slows down or stops absorption it will slow down evaporation and may create more problems then untreated stone if the moisture is trapped for longer period of time. again thats my opinion and the sealer believers please dont crucify me.

On Mon, Dec 4, 2017 at 8:57 AM, Stuart Young <santafefc@sbcglobal.net> wrote:
Does this limestone densifier have any effect on limestone’s propensity to turn black (mold) in exterior settings? Mold in exterior settings is the major problem that we deal with.  In the past, I have seen that some say to just clean it periodically, and forget sealing it.  Recently, I have read other opinions.  Any thoughts?

Stuart Young
Santa Fe Floor Care



On Dec 3, 2017, at 5:45 PM, Tony Warney <tony@excelstoneandtilecare.com> wrote:

Thanks


On Sun, Dec 3, 2017 at 1:50 PM, Stuart Rosen <mail@stoneshine.com> wrote:

Here's some info on it-we stock it-on the east and west coast.


LIMESTONE DENSIFIER is a water-based impregnating and hardening sealer of the highest quality, specifically developed to speed up and simplify the mechanical sanding and polishing process of limestone and lime-based materials, which are more difficult to polish on account of their porous nature and their high capacity to absorb water. LIMESTONE DENSIFIER is characterised by a 100% water-based, eco-friendly formula and for its lack of volatile organic compounds (V.O.C. Free), therefore, its use is not harmful to the environment or for the health of users, either during or after application.
 
LIMESTONE DENSIFIER, when used as part of the sanding and polishing process, offers various benefits:
 
-          It consolidate and harden the material as it increases the hardness of the treated surface and provides better mechanical resistance against abrasion and scratches.
-          It drastically limits water absorption on the floor and prevents all of the problems linked to excessive moisture in the stone;
-          It also speeds up the drying time required by the surface before it can be subjected to other processing or treatment.
-          It speeds up the mechanical sanding and polishing process, allowing the operator to treat larger surfaces within the same amount of time than would be possible on untreated materials, as it reduces the friction between the surface and the polishing tool.
-          It significantly reduces wear and tear to polishing tools as well as the amount of water needed to complete the job.
-          Material is given pronounced damp proof properties.

-          Surfaces become water-repellent

-          It reduces the possibility of dirt build up on the material

-          The performance of any stain-proofing product applied afterwards is significantly increased.

-          It also increases the results achieved by the polishing grain used.

 
The specific characteristics of this LIMESTONE DENSIFIER is that it penetrates the limestone deep down, hardening it and ensuring tough, lasting protection against rising damp, which is responsible for most of the problems generally found with this material: persistent damp marks, formation of rust, flaking and pop-ups, and saline efflorescence, which are responsible for  attacking the surface. LIMESTONE DENSIFIER also does not compromise the original breathability of the surface, since it does not create any type of film or alter the original appearance of the material.

On Sun, Dec 3, 2017 at 4:36 PM, Mike Marsoun <outerislandstonecare@gmail.com> wrote:
Who makes that identifier as shown? Is that potassium or sodium silicate? 


On 1 Dec 2017, at 8:47 am, Stuart Rosen <mail@stoneshine.com> wrote:

Good Point- limestone densifier is really good and will make a significant difference.

Virus-free. www.avg.com

On Thu, Nov 30, 2017 at 1:10 PM, Nicinski <mail@rocklandstonerestoration.com> wrote:
Antiquing brushes as Stu suggested is the way to go you may want to try to clean and then brush depending on what you can charge.
It looks like soft and very absorbent limestone so i will suggest to go with Densifier  maybe even twice before sealer. Best way would be in my opinion to clean it first with alkaline cleaner and brush, neutralize it, densified, hone with antiquing brushes somewhere at 80gr, clean slurry, densified, honed with 150gr brush, clean slurry, finish with 500gr dry to get nice patina and seal it with impregnating sealer.

On Thu, Nov 30, 2017 at 10:39 AM, Stuart Rosen <mail@stoneshine.com> wrote:
Agree with Fred-testing is needed but grit brushes may be the way to go.We refinish brushed,antiqued,leather and textured surfaces for our clients .
Brushes are always the key-
It may just clean up with some good scrubbing. Its possible you could even refinish before the installation or just refinish it after the install to correct any potential grout residue issues.

On Thu, Nov 30, 2017 at 7:49 AM, Fred Hueston <fhueston@gmail.com> wrote:
Tony

I would first try scrubbing with an alkaline cleaner and see what will come off. Typically acyrlic coatings will yellow so a good Alkaline or a floor finish stripper will do the trick

On Wed, Nov 29, 2017 at 9:46 PM, Tony Warney <tony@excelstoneandtilecare.com> wrote:
I have a client who wants us to restore 1200 sf of this French limestone. It was removed from an 18th century home, they want to use it in part of there new home. It originally was a cream color. It is now a yellow dirt color. It is very textured. Would appreciate any ideas on restoring.It may have some coats of sealer from many years ago. thanks

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Excel Stone and Tile Care
 
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Stone Inspection and Troubleshooting seminar Jan 29-Feb 1, 2018 Las Vegas
For more details see the training section at www.stoneforensics.com
check out the Stone and Tile Radio Show at http://www.blogtalkradio.com/drfred