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Surface Preparation - New Concrete Print E-mail
One of the great things about Concrete Guard is that minimal surface preparation is required.  For example, Concrete Guard easily handles the alkalinity of new concrete and can be applied the same day!

Other sealers in the market require you to:

  • conduct a 2 hour moisture check first (using a sheet of plastic taped on to the concrete whereby you measure condensation and guess the remaining moisture content),
  • or even asking you to acid etch first and then apply treatment with soda ash - without the concrete drying during this process!  Even then you can still have to add an additional 20% xylene (very flammable and dangerous to breathe) content to the first coating of sealer.
  • and still others want you to wait for 14 days before applying.

By applying Concrete Guard you don't have to return back to a job at a later date!  This means that you can protect your investment in concrete before it can be spoiled by dirt, organic debris, tannin stains from unsealed wood, oils etc.  No wonder the tradesmen love it!

When you apply Concrete Guard the same day, it also acts as a curing agent.  Especially in Australian conditions, the curing is an important aspect of the laying of your concrete for the following reasons:

  • Firstly, (in case you didn't know) it is not the drying out that gives concrete its strength, it is the chemical reaction that occours while the concrete is setting / curing.
  • By curing your concrete, you get a predictable strength increase.  Lab tests show that concrete poured ina dry environment can lose as much as 50% of its strength compared to the same concrete being "moist cured". 
  • Concrete that has been poured in high temperature conditions will gain strength early, but later strength gains are likely to be reduced.
  • Cured concrete also has increased durability, with a better surface hardness.  It also has a better serviceability and appearance.  A concrete slab that has been allowed to dry out too early will have a soft surface with poor resistance to wear and abrasion.

If you are sealing a drivway or other area that has been stencilled with the application of coloured mortar via an airless spray gun, it is always advisable that you give the surface a brush over with a broom to dislodge any superfluous particles.

Other than that, the only other thing to do is to make sure that your concrete slab is not too hot before applying Concrete Guard.  Concrete Guard is water based and needs time to coalesce - something that can be impeded by rapid water evaporation.