Best filler for concrete gaps?

[Danllan]

As in the title; tried several and not impressed, anyone have a brand they've used for some time and are still happy with? TIA.

 

[Breakthru]

Is this on the vertical or horizontal? There is an extensive thread and answers on silage pit side leaking in water. If you are on the level especially or even potholes Travis Perkins post crete has worked for me. Ten minutes after putting a 20kg bag in a hole well mixed with water a 30t artic ran over it and only left tread marks which I smoothed after he left. Was still there complete 3 years later where forklifts screw round unloading pallets.

 

[Spencer]

Floor saver pourable epoxy filler is top stuff! Highly recommend, but got to work FAST once you mix it

 

[Danllan]

Thanks for that, I was entirely unaware of the silage pit thread. Should have written that it's for horizontal cracks and gaps; and not so big, maybe 2" absolute max and diminishing as they go down, most around the half inch wide mark.

 

[shumungus]

The best performing substance I have on floor cracks/expansion joints here has been old school hot bitumen.

 

[manhill]

thinking about Epoxy resin to repair floor damage as cement is too weak where it meshes thinly with the surrounding floor. Shumungus's idea is worth a try too.

 

[Danllan]

The best performing substance I have on floor cracks/expansion joints here has been old school hot bitumen.

I hadn't even considered bitumen - which is rather daft because I used to help my father use it...

thinking about Epoxy resin to repair floor damage as cement is too weak where it meshes thinly with the surrounding floor. Shumungus's idea is worth a try too.

Yep, I'm thinking I'll go with bitumen for the linear ones and an epoxy of some sort for the more open ones.