Two-part polyurea spray elastomers were introduced to the market in the 1990s after being invented by Bayer (the aspirin company) of Germany. They are advantageous coatings for large surface area projects because of their fast reactivity and their insensitivity to moisture. They can be utilized at nearly any temperature, they bond quickly and easily to concrete and metal surfaces, cure to full strength in as little as a half an hour, also is flexible enough to bridge small cracks and withstand high temperatures when cured. Some polyureas reach strengths of 6000psi tensile and over 500% elongation meaning it is one very tough coating. Due to the rapid cure time, many coats can be mounted up quickly.
Is Polyurea Really this Good?
The most vital factor that determines how well a polyurea will bond and endure is the preparation of the substrate. Moisture vapor emission rate and proper solids content are also critical factors in developing a conventional bond. When those stipulations are met, you will experience a truly adept polyurea coating operation.
The detailed applications range from a new way to coat concrete floors, to spray on linings such as bedliners and floor coatings to sealers for concrete countertops to impermeable coatings for concrete bridge columns. In the decorative concrete field, the most intriguing potential applications are as a replacement for polyurea/polyurethane coatings for floors.
Is a polyspartic a polyurea?
All polyureas are two-part systems, meaning that a resin has to be mixed with a catalyst to create the curing reaction that hardens the material. Polyurea has been used very successfully for corrosion-resistant coatings and restoration supplies, although the applicability is cumbersome since it has an extremely short pot life of about 3 seconds, so the two parts must be mixed at the spray tip, demanding lots of upkeep on expensive high-pressure equipment.