Filling Concrete expansion/contraction joints

[Com_VC]

Hi,

In the garage I have these joins that run from one end of the slab to the other. they are nearly 10mm wide and as such a lot of dirt/dust etc collects in there. It also makes it hard to sweep up as everything just end up in the joins and I need to get down there with a small broom/dustpan and sweep the joins up.

Was just wondering what is the best way to fill these up?

Thanks

 

[PecosBill]

Are you going to install a finish over them? If not, you can use either an epoxy or polyurea joint filler.

 

[Com_VC]

not at the moment, was thinking later on about painting it or tiling but not 100% sure yet. Will it cause issues later on if I did want to paint it?

 

[PecosBill]

No, it won't be an issue with paint. Both are semi-rigid joint fillers, so they are designed to flex a bit with any slight movement between the slabs. If you go to a rigid finish floor, you just have to remember to honor the joint through the whole system.

 

[Com_VC]

thanks, is there any particular filler you recommend? Do they require much curing time?

 

[LegacyIndustrial]

thanks, is there any particular filler you recommend? Do they require much curing time?

We have one but don't ship down under. Look for a vendor supplying a "low modules gel". This should be fast curing and resilient. Similar to what Pecos was referring to.l

 

[AlphaGarage]

We offer "IntegraFlex 1921" just for these situations. It's a 100% solids epoxy that retains about 50% elongation flexibility after it's fully cured.

 

[V-10 Killer]

I used plain old paintable caulk in mine and epoxied over it, never flaked off or discolored. I'm sure there are better ways of doing it, but this worked anyway.