Epoxy over magnesium-flurosilicate concrete hardener???

[kyles974]

I've searched here and the web and can't find anything.

Can an epoxy be put over BASF Lapidolith?

It is a magnesium-flurosilicate concrete hardener and dustproofer.


I would think it wouldn't be a problem but some say it leaves slight gloss. So that scares me.

 

[LegacyIndustrial]

Densification helps to prohibit absorption. Coating preparation is geared toward the opposite.

 

[Edger]

I coated many floors after using that product with complete success.

However, all these floors had the smooth top worn off so they were quite porous. If you had any shiny areas before applying the hardener it would make the penetration of the epoxy much more difficult. I only used it on soft to medium floors, if yours is medium to hard do not use the hardener before coating.

 

[kyles974]

Densification helps to prohibit absorption. Coating preparation is geared toward the opposite.

makes sence

I coated many floors after using that product with complete success.

However, all these floors had the smooth top worn off so they were quite porous. If you had any shiny areas before applying the hardener it would make the penetration of the epoxy much more difficult. I only used it on soft to medium floors, if yours is medium to hard do not use the hardener before coating.

ya, mine is porous. It was soft to medium, my guy applied the BASF product, and I got to check it again, but it seems to be medium to hard. He did two coats and left enough to do 2 more coats. If it harden, then I shouldn't apply the other coats then?

 

[Edger]

Two coats should be plenty. If you are concerned you can always do a test.

Get some epoxy, mix a little bit and apply it to the floor area that looks the hardest, or tightest. Wait a month and then do some chipping tests to see if it chips or peels without pulling off concrete.

 

[LegacyIndustrial]

Edger:

Kyle can also do the water test, throw a cup of water on the floor and see if it turns the concrete dark and starts to absorb or beads up.

 

[Edger]

Edger:

Kyle can also do the water test, throw a cup of water on the floor and see if it turns the concrete dark and starts to absorb or beads up.

I guess that is OK, but everyone is in uncharted waters here because we never know how much harder the floor is, how hard it was, the surface texture etc. A test takes time, but most guys have some time. If it was not hardened I would definitely use the water test.

My jobs were always easier to decide because I could physically see the floor after and if it failed in some areas I would always be prepared to fix it up. Sometimes you just take a chance, and luckily it was very rare that we had a problem.

 

[kyles974]

two great points edger and scotty,

thanks

 

[thegarageguy]

The only time we use a densifier is when effloressence is present and a decorative concrete floor is chosen by the client. We usually use an acrylic or a special breathable epoxy sealer and without the densifier the effloressence gets pushed back up and gets caught between the coating and concrete. This usually looks like if a floor has that fish disease called ick. White blotches everywhere. Other than that, using it before a regular epoxy coating is completely useless. Here is an example;