|Primary||Polyether amine||Polyether amine / Polyether Polyol||Polyether Polyol|
|Extender||Aromatic or aliphatic Diamine||Aromatic or aliphatic Diamine / Glycol||Glycol|
|Fast cure combined with moisture Insensitivity.||Fast Cure is possible with a catalyst but is moisture-sensitive.|
|Due to the high reactivity rate, low activation energy is needed, resulting in a broader application range (Temp / Relative humidity).||A lower reactivity rate results in the need for a catalyst and a limited application range.|
|Excellent Physical Properties||A wide range of physical properties are possible.|
|Limited formulation range due to a limited range of useable amine functional products.||A broad range of polyols and chain extenders are available.|
|Moderate system Cost||Lower System Cost|
|Very fast back to service time of this area||Depending on the system but slower back-into-service times|
From an equipment standpoint, many applicators seem to be having issues with using the XP70 (Plural 2:1) without quick build-up through the equipment and often end up losing hoses (due to the sensitivity of the catalyst in the A-side). Polyurea is sprayed through reactors and impingement mixing, which helps keep the reaction clean from any reaction inside of the unit as both parts stay clear of one another all the way through the system. The reaction happens at the tip of the gun through the mixing chamber. So our Graco workshop gets a lot fewer reactor issues than other plural equipment (Mainly XP70) used with slow-set Hybrids or Polyurethanes.
Conclusion - After years spent in the development and testing of Polyurea and polyurethane coatings, we recommend the use of Pure Polyurea when it comes to any application that will be in contact with water, especially in immersion (Water facilities). We also highly recommend Pure Polyurea over Hybrids for waterproofing applications to avoid premature failures, especially externally on concrete and steel roofs.
If you have any other issues, please feel free to contact our technical office at 1300 123 085 and speak to either Bryant or Ben.