There are several key elements required to successfully seal concrete using solvent based sealers. Best practice provides for a trouble-free application, job satisfaction and a contented customer. Understanding some of the basic requirements will go a long way to achieving a successful outcome. Consideration of the following factors and planning prior to commencing the sealing operation is essential.

  • Understand the properties of the concrete to be sealed. It is helpful to identify the MPa of the concrete, how was it was finished, its age, if curing compounds were used and whether the concrete is new or old. This information will impact on the choice of sealer and the amount and method of preparation required.
  • Environmental and weather considerations. Temperature, wind speed and time of day all impact on applying the sealer. Sealing should only be undertaken between 10ºC and 32ºC and wind speed should be less than 12 knots.
  • Preparation of the concrete substrate. Whether old or new concrete, plain, coloured, resurfaced, stencilled or stamped, the concrete must be correctly prepared so it will accept the sealer. Preparation is vastly different for old and new concrete. 
  • Choose a suitable product. You only get what you pay for! Use a good quality sealer from a reputable company. Cheap sealers are full of solvent and not much resin, so they will not last. 
  • Thoroughly read and understand the product Technical Data Sheet (TDS). It is imperative that everything about the sealer and its application
    is understood before attempting to use and apply it. This is all contained in the TDS.  
  • Choose suitable application equipment. The equipment used is determined by several factors, such as the type of concrete, the size of the job and the weather conditions.
  • Use the correct application method. Whether spraying, rolling or brooming the sealer, there is one golden rule…thin coats are best.
  • Ensure proper product drying times. Allow the sealer the recommended time (refer to TDS) to dry between coats, and before pedestrian and/or vehicular traffic is permitted.  
  • Clean and maintain the sealed concrete. It is a misconception that sealed concrete does not need to be cleaned and maintained. Provide a guide to the customer so they understand how to look after the surface. Also provide an estimate of when the concrete will need to be resealed which is usually about 18 months depending on traffic.

If any of the key requirements are not undertaken  properly, it is highly likely that the application of the sealer will fail, resulting in the job having to be redone. Redoing a job is much more time consuming and expensive than doing the job properly in the first place. 

If you are interested in knowing more about this type of sealing, we would be delighted to send
you our free comprehensive booklet, An Applicators Guide to Sealing with Solvent Based Acrylic Resin Sealers.
Just email and request your free copy today.

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