NEW slab, epoxy

[brookscooper]

So, I've looked and searched. If I'm search deficient and this has been covered a million times then chide me well.

Here are my questions:

I'm going to use a 2 part epoxy - probably epoxy coat but I doubt brand matters for these questions:

1) The slab will be brand new - what surface texture should I have the concrete guys give me to make epoxy application easiest?

2) It's a 3" slab on a metal deck - it's the main slab above a basement. There will be NO water curing out of the slab from below - only above. How long should I / must I wait to coat with epoxy?

Thanks all!

 

[ssathre]

So, I've looked and searched. If I'm search deficient and this has been covered a million times then chide me well.

Here are my questions:

I'm going to use a 2 part epoxy - probably epoxy coat but I doubt brand matters for these questions:

1) The slab will be brand new - what surface texture should I have the concrete guys give me to make epoxy application easiest?

2) It's a 3" slab on a metal deck - it's the main slab above a basement. There will be NO water curing out of the slab from below - only above. How long should I / must I wait to coat with epoxy?

Thanks all!

light broom finish.

at least 30 days and perform a moisture test before you put the epoxy down. I'm sure there is more but that's what I have learned so far.

 

[brookscooper]

thanks!

 

[rugerlady]

I concur. Request a light broom finish. Make sure they do NOT put a sealer on your concrete. It should be good in 30 days. Make sure to do a moisture test before applying any epoxy.

 

[gatchel]

What happens if you don't have a light broom finish or you have a smoother than light broom finish? Will it still adhere to virgin concrete properly? (Still using the proper etching/prep that is recommended)

 

[Cruzin90]

The surface needs a rough finish ("profile") in order to provide more surface area for mechanical bonding. The surface also needs to be clean, have the laitance removed, and porous (no sealer).

Tell the concrete people the profile needs to be similiar to CSP 1, 2 or 3 (2 and 3 is better). If they don't know what that is, then say "light broom".