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Rapid Concrete Crack Repair

3:37
14:57
38.6K views

At 3:37 in

Weird Sh.t from World of Concrete

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What happens here

A demonstrator from Roadware shows how to repair concrete cracks using their "10 Minute Concrete Mender." This is a two-part polyurethane product applied with a special gun. For typical crack repair, a small amount of silica sand is added to the crack first. The liquid mender is then injected into the crack, saturating the sand and penetrating deeply into the concrete due to its low surface tension (one-third of water). The product cures quickly, in about 10 minutes at 70°F, reaching approximately 5,000 PSI strength. It can also be mixed with sand in a cup and troweled into larger repairs.

Goal: Learn to quickly and effectively repair concrete cracks using a specialized mender.

Tools and materials

  • Applicator Gun Roadware — Dispensing the two-part concrete mender
  • Concrete Block with Cracks — Demonstrating crack repair
  • Mixing Nozzle Roadware — Ensuring proper mixing of the two-part mender as it is dispensed
  • Small Cups — Mixing the mender with sand for larger repairs
  • Wooden Stir Stick — Mixing the mender with sand for larger repairs
  • 10 Minute Concrete Mender Roadware — Filling and repairing concrete cracks
  • Silica Sand — Filling cracks before mender application and mixing with mender for larger repairs

What they say

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thank you gentlemen and this is from Mira Primera ready yep mixing going so what are you doing with this skill this is Road where 10 minute concrete Fender is a two-part polyurethane this is how we would fix a typical crack at first I would wet it down a little bit with the seven Center points very thin concrete bender and then I would add a little bit of silica sand to it this is 30 40 grit silica sand use a tip like this and you can inject it and then the key to it is make sure you get the same goodness saturated so we'll hit it again you see how to go right through that sand right into the concrete what's great about concrete mender is that it has a surface tension one third of water so you can make a repair and it'll penetrate really deeply into the concrete get into the pores of the concrete and wet it off very quickly that's all there is to it for a small crack and that's it that's pretty much it we can let it goes will that stay that color then or no it's going to start off black it's going to cure a light gray okay I'll show you here how how this material will penetrate and uh yeah this is a pretty fine sand it's almost like like table salt and 30 40 gram but it'll go down you know one or two inches in the sand readily and this will all cure up in about 10 minutes and 70 degrees and what is this product called 10 minute concrete mender and that gets as hard as concrete it's about as hard as concrete about 5000 PSI has a really good utensil strength so that it won't pull apart very easily so I really have a big store area interlock between cracks all right concrete mender yeah it won't get rid of stuff so same thing for bigger cracks I guess sure yeah and now this is cool too once I have it mixed in with some sand it doesn't cure right away I still have plenty of working time so I can actually come over here it repairs that way as well control it in it's so you can make it running it's going just how you want it to go and then it hardens up yeah all right thank you sir concrete 10 minute concrete Mender

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