Alpha Pro Fluidizer 1 lb - Dry superplasticizer for Any Concrete Countertop Mix

I love this product. All it took was one or two tablespoons added to a bag of Rapid Set concrete which was mixed with the minimum amount of water/latex admixture to turn it from barely able to clump to the consistency of a thick pancake batter. This makes it easy to pour the mixture into 2 inch wide cracks in concrete slab as well as finishing the surface. Using minimum amount of liquid gives the highest strength concrete. This helps reduce cracking due to winter freeze and thaw . I filled about 35 feet of cracks in patio varying from 2” to 6” last fall. This spring the patio is solid without any cracks. Note the Rapid set concrete has a higher strength than typical bags of concrete made with Portland cement. The one downside is that the Rapid set concrete sets up within about 15-20 min even when using set control and working at 50F (late fall. Western NY). Great product.

Works great if you follow the directions. I didn't get any separation, shrinking, and two weeks later no cracks. (1.5" counter top)

Simply the best. Use tiny amounts

I mixed up a few batches of really dry, stiff concrete, and just tested each one to see how little of this plasticizer I could add, and I was kind of amazed how much difference it made! There are other brands, but this one was inexpensive and did the job really well.

Amazing new tech for concrete! Less water = greater strength. Those who complain of separation are using too much. The online instructions even explain this. First, figure out the amount of CEMENT (not aggregate) in your mix. This is the number that you multiply x .00375. For instance, a 60 lb bag of Sackrete high strength (4kpsi, 1:2:3 mix) would take 17grams as it's just 1/6th cement. That's just a starting point though. Dose will vary so experiment. Also, it can take several minutes of mixing to see the full result.

I got this for my new hobby, making paving stones and plaques from molds. Saw a lot of recommendations to use a superplasticizer, so you can use less water and get more strength. What I found is that, almost immediately, the water separates and floats to the top, and the cement and aggregates sink to the bottom and harden. This makes it impossible to use vibration to remove air bubbles from the surface of the piece. I can see it being good for countertops though, as the liquid on top will make a very smooth surface.

Works like magic to improve flow without thing the mix. I use this product to cast concrete garden bed sides at 1.5" with a bit of fiber added.

It had clumps in it and ruined my concrete countertops