Film forming WB concrete sealer after densifier

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David

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Film forming WB concrete sealer after densifier
« on: February 19, 2014, 02:25:41 PM »
Hi,

We are building a new home and are having exposed concrete floors throughout. The builder used a harder than usual concrete mix and more reo to try and minimize cracking, and used the helicopter trowel extensively after laying to get as smooth and consistent finish as possible. There have ended up being a few rough patches around though and despite their best efforts at protecting the slab there has been some plaster/mortar etc dropped on it. To clean it up we plan on grinding the surface ourselves, not so much to expose the aggregate but just a little to remove some of the plaster etc as well as smoothing off the whole surface for a more even look. We do not want a wet look gloss finish, but rather a matt or semi gloss look that is easy to clean.         
My question is, if we use the Concrete Densifier mid way through the grinding process (after 80 grit), can we then apply the Film Forming Concrete Sealer WB at the end of polishing to give us the semi gloss, easy clean finish we are after?

Thanks for your help in advance,
Dave

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Tex Rowe

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Re: Film forming WB concrete sealer after densifier
« Reply #1 on: February 19, 2014, 06:33:36 PM »
Hi Dave,
yes that is typically the process or system for those not wishing to polish all the way up to say 3000 grit resin pads.
As a rough guide the process should look like:
Grind - Densify - Polish - Seal.
Of course there are many variations like:
40 Grind - Densify - 80 Grind - Seal etc.
We should add two points though. Generally it is not advisable to polish above 800 grit if applying a sealer as adhesion could become an issue.
The second is while Film Forming Concrete Sealer WB is acceptable to use, it will require maintenance coats every few years or so. Most in your scenario choose to pass the acrylics and utilise a more durable coating system like 100% Solids Epoxy Flooring Kit which can be found here: http://cswcoatings.com.au/100-solids-epoxy-flooring-kit/

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David

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Re: Film forming WB concrete sealer after densifier
« Reply #2 on: February 23, 2014, 11:33:09 PM »
Thanks for your advice Tex,

We definitely like the idea of less maintenance for the floor and I see the Premium Penetrating Concrete Sealer has an expected wear time of up to 15 years. Is this sealer also compatible with the Concrete Densifier?

After a bit more investigating we are looking at the option of achieving the smooth finish required to make for easy cleaning by grinding to a higher grit level, maybe 800, 1500 or 3000, and using the Premium Penetrating Sealer to provide protection for many, many years (We have decided we would rather a high gloss level if necessary to achieve easy cleaning as well as a very long lasting seal). You mention you would not go over 800 grit if applying a sealer due to adhesion issues. Does this also apply to the Penetrating Sealers?   

One last query, during the grinding process we may need to use a liquid grouter of some kind to fill in pinholes and other imperfections. Are there any that you would recommend to use with your densifier and penetrating sealer? Would most be compatible with your products?

Thanks again,
Dave 

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Tex Rowe

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Re: Film forming WB concrete sealer after densifier
« Reply #3 on: February 24, 2014, 04:08:19 PM »
We definitely like the idea of less maintenance for the floor and I see the Premium Penetrating Concrete Sealer has an expected wear time of up to 15 years. Is this sealer also compatible with the Concrete Densifier?
No, the penetrating Premium and Densifier are not compatible. If utilising a Densifier and polishing all the way to 3000, then a penetrating sealer is not necessary anyway.

After a bit more investigating we are looking at the option of achieving the smooth finish required to make for easy cleaning by grinding to a higher grit level, maybe 800, 1500 or 3000, and using the Premium Penetrating Sealer to provide protection for many, many years (We have decided we would rather a high gloss level if necessary to achieve easy cleaning as well as a very long lasting seal). You mention you would not go over 800 grit if applying a sealer due to adhesion issues. Does this also apply to the Penetrating Sealers?   
No, 800 grit is a guide for coatings and not penetrating sealers. If your slab can absorb water after say a 2 minute period, it can absorb our sealer.

One last query, during the grinding process we may need to use a liquid grouter of some kind to fill in pinholes and other imperfections. Are there any that you would recommend to use with your densifier and penetrating sealer? Would most be compatible with your products?
Usually we suggest our Crack Filler as it is still required to be porous to accept a penetrating or topical product thus reducing compatibility issues.

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David

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Re: Film forming WB concrete sealer after densifier
« Reply #4 on: February 24, 2014, 07:01:31 PM »
Excellent, thanks Tex!