Concrete Super Plasticiser: 5 Litre water reducing superplasticizer (5 Litre)

It works very well and enhances working time, and reduces viscosity without prejudice to final strength - was skeptical but no longer. Used for RC in DIY hot tub.

Very strong stuff, excellent value for money. Be very careful to follow the dosing and if in doubt go for less. It allows for very low water content or super fluidity, worked great for me making decorative concrete.

Does not seem to work as good as I expected, perhaps I am not getting the mix correct.

I used it very occasionally for odd jobs around the house and I'm still using the same bottle about 2 years after purchasing, so great value. It greatly reduces the water needed, making concrete super strong and gives mortar mixes that spread to it. It's easy to use only a little bit is needed, but I'd recommend mixing it really well and adding water gradually then mixing further, as it's easy to make your mixes too wet with this.

Only use if u want very runny cement.

Used to create footings for retaining walls and fill the 6ft hollow block walls built on top. I found a 0.6 WC ratio and maximum dosing created a self compacting mix. With superplasticisers the mix becomes super sensitive to water content so you need to mix and pour fast else water absorption by dry aggregate can reduce flow properties. Obviously can add more water but if trying to achieve a specified strength it's not ideal road to go down. Once you've got a SCC mix. Pouring is sooooo easy. Even long trenches can be poured from just one or two locations. There is a limit as to how far the SCC will flow/creep but it is extremely easy to persuade further with a spade or pokey stick. Levelling/Finishing are also insanely easy, I find myself feeling like I've forgotten something as it's such low effort. Filling deep cavities successfuly needs pre wetting with hose else the substrate can pull too much water from the mix, but it's still 1000% easier than messing with pokers. Overall it does add a significant cost to the mix but this is easily outweighed by time saving. It also makes it pretty easy to do fairly big pours solo if required.

This has fixed the concrete on my lower wall prior to painting...

Brilliant. I mix my concrete (well, mortar if we’re being totally honest) with the dry ingredients first then a minimal amount of water (which already has water reducers in) then mix again. All with a paddle mixer. Then, I add half a capful of this and whisk again. The mortar turns into a creamy consistency with minimal slump. Excellent.