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Polyaspartic Coating Limitations

Concerns over reaction speed and slip resistance

As with any coating system, there are pros and cons. When it comes to polyaspartic coating systems, the benefits far outweigh the limitations. However, there are a few major limitations to consider:

Reaction Speed
The advantage of a fast cure can become a detriment if the material sets before application is complete. Polyaspartics can have cure times ranging from less than 10 minutes to 45 minutes depending on solids content, surface temperature and product chemistry. If these coatings happen to set before application is complete, trapped bubbles, blisters, and lap lines can be visible and ruin an otherwise perfect job.

Slip Resistance
Even at 3 to 5 mils in thickness, polyaspartic coatings can be very slippery when wet. The material will meet the ASTM coefficient of friction when dry, but will not when wet. This is especially important to consider if they are going to be used on exterior surfaces or on surfaces that may get wet periodically. If you plan on using polyaspartics in areas where standing water can be present, consider using a grit additive to increase the coefficient of friction (see Making Concrete Slip Resistant). Most polyaspartic coatings will accept polymer grit as well as quartz aggregate.

Removal
Polyaspartics are not foolproof, and should be installed by professionals who have extensive floor coating experience. We love the fact that polyaspartics are tough materials, but that quality also makes them tough to remove or repair if problems occur during application.

Despite these limitations, the cost-to-performance ratio of polyaspartics is good, and they warrant consideration for any future project where a high-performance coating is specified or being considered. Their relative ease of installation and solid performance characteristics make them the choice for the new generation of high-performance flooring.

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