Concrete Sealer

[dik]

What is the best manner to apply a concrete sealer to an outside SOG so the surface isn't slippery? Should a grit be epoxied on first? Can the surface be roughened first? I suspect the initial finish should have been a medium broomed finish. The surface is a light metal trowelled finish. The sealer will be a silane or siloxane material. Is there a better sealer? With the epoxy the sealer can likely be dispensed with.

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Do you feel any better?

-Dik

 

[Tomfh]

I’d blast it

 

[bridgebuster]

On bridge decks in NYS, we perform a turf drag as part of the finishing, after curing, we place the saw cut grooves, then apply a silane or silooxane sealer after doing a light sand or grit blasting. Water-based products are not permitted on riding or walking surfaces.

 

[dik]

Thanks, gentlemen.

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Do you feel any better?

-Dik

 

[dik]

with dry ice? or sand? or hydro?

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Do you feel any better?

-Dik

 

[Canuck65]

I would blast it with sand. However, if you are in an area that can't take the dust of sandblasting, then using a shot blasting machine is a nice tidy way to achieve very good results.

 

[dik]

Thanks, Canuck...

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Do you feel any better?

-Dik

 

[Tomfh]

with dry ice? or sand? or hydro?

Sand or similar. The contractors generally know the best media to use for the desired outcome.

 

[dik]

thanks, tom

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Do you feel any better?

-Dik

 

[BridgeSmith]

For bridge decks out here, we use epoxy with sand as a sealer and driving surface. Spread epoxy resin, broadcast sand, repeat 2 more times. Enough grip and durable enough highway truck traffic.

Rod Smith, P.E., The artist formerly known as HotRod10

 

[Canuck65]

If you use a penetrating sealer then is should have little affect on the slip resistance. I think in the old days we would specify a product by the name of Hydrozo. It was quite popular at the time. If you can track down the manufacturer and talk to a technical sales rep I am sure they get you the product that you need. With a Hydrozo sealer, it can be spray applied. No need to broadcast silica sand. I will need to be reapplied every 5 years or so depending on amount of traffic, but it is nearly invisible.

 

[epoxybot]

Silanes and siloxanes are penetrating sealers and require a porous surface. The silane linkage requires an inorganic substrate in order to bond. It will otherwise just evaporate. An epoxy sealer will render any subsequent application of a silane/siloxane sealer impossible.

If improvement of slip resistance is the goal, shot-blasting should render the most consistent/uniform degree of substrate removal.

Your choice is an epoxy dealer with sand, resulting in a darker concrete surface w/ future higher cost maintenance or surface blasting and a silane or siloxane sealer with a re-application time of 3 to 7 years depending on traffic and application.

 

[dik]

Yup... thanks, epoxy

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Do you feel any better?

-Dik

 

[BridgeSmith]

If you use a penetrating sealer then is should have little affect on the slip resistance. I think in the old days we would specify a product by the name of Hydrozo. It was quite popular at the time. If you can track down the manufacturer and talk to a technical sales rep I am sure they get you the product that you need. With a Hydrozo sealer, it can be spray applied. No need to broadcast silica sand. I will need to be reapplied every 5 years or so depending on amount of traffic, but it is nearly invisible.

We specify methyl methacrylate sealers.

ACI Field Guide - Methacrylate

Rod Smith, P.E., The artist formerly known as HotRod10

 

[dik]

thanks, Rod... That's one of the class of sealers that you have to be really careful in handling.

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Do you feel any better?

-Dik