cure time

[Irbowhntr]

Just joined here last week so I have been looking but really have not found how long it takes concrete to cure before you can coat it.. I had a 30 x 50 garage built and want to get the floors coated. The pad was poured mid January garage finished in Febuary. Spray foam insulation and electric work theen I am ready for coating. Since it is a new pad do I need to grind it or just etch it before going on with polyurea finish? Any info would be appreciated.

 

[Shea]

You need to wait a minimum of 30 days for a 4" concrete slab to cure before applying a coating, so you are good there. Yes, you still need to acid etch or grind before applying a polyurea coating. It's all about creating the correct profile for the coating to adhere and penetrate. How new the concrete is has nothing to do with it.

 

[Armorpoxy]

Shea is correct, general rule of thumb is minimum 30 days. Etching or grinding always recommended for good adhesion.

We carry an excellent one part hybrid polyurea/polyaspartic called SPGX that would work very well for this application.

 

[ATCGA]

Do you have to wait 30 days before etching or can that be done earlier?

 

[James-W]

Sorry I can't answer your question, I just wanted to welcome the opening poster to the forum.

 

[ATCGA]

Thanks. Trying to find all the right answers is proving to be a little difficult. Great forum though.

 

[Irbowhntr]

was hoping I could just etch obviously that is much easier.. Thanks

 

[LegacyIndustrial]

was hoping I could just etch obviously that is much easier.. Thanks

Etching is viable if done right over sound concrete.
Here are some good instructions:
http://www.legacyindustrial.net/pdf/HowtoAcidEtch.pdf

 

[ATCGA]

Etching is viable if done right over sound concrete.
Here are some good instructions:
http://www.legacyindustrial.net/pdf/HowtoAcidEtch.pdf

So can you etch new concrete or do you wait 30 days and do it all at the same time?

 

[tncatadjuster]

Wait to etch, let the concrete cure then etch.

 

[ATCGA]

Wait to etch, let the concrete cure then etch.

Thanks!

 

[LegacyIndustrial]

Wait to etch, let the concrete cure then etch.

 

[Irbowhntr]

another question after reading more post here... So slab was powered troweled is etching still good or do I need to grind?

 

[hichamaziz]

yah my friend You need to wait a minimum of 30 days .

 

[Armorpoxy]

If the slab was highly power troweled and burnished, sometimes etching may not be enough, or you may need to etch st a higher concentration of acid.

Use of a rented Diamabrush from Home Depot would be the next step. Wait until fully cured, don't pre-prep.

 

[Irbowhntr]

I am waiting on electric and spray foam before I do floor so it should be good and cured in a month or so more... I will etch and see how it looks ..hopefully thats all i need for prep