What effect does temperature have on moisture cured coatings like White-Knight/ White-Stallion or White-Star?
Temperature will affect the curing time of a polyurethane or polyurea hybrid coatings. As a rule of thumb, for every 18°F (7°C) rise in temperature, the curing rate will be cut in half.
More simply put, as the temperature increases, the cure time of the coating will be shorter. Therefore, what effect does humidity have on moisture cured coatings like White-Knight/ White-Stallion or White-Star?
Polyurethane or Polyurea hybrid coatings are sensitive to moisture. In fact, moisture is the trigger that starts the curing reaction. In general, you should not apply coating when the humidity level is over 90% because high levels of humidity can affect the properties of the coating and can cause it to gel sooner. This rapid curing can give your coating an irregular appearance.
What effect does temperature and humidity have on a water based coating like Pyramic?
Temperatrure and humidity definitely play a role during the curing of waterborne coatings. You do not want the relative humidity or temperature to be too high (above 90% humidity and above 95°F (35°C) temperature) and you do not want the dark roof surface to be excessively hot because it affects the speed at which the water and coalescing solvents evaporate relative to each other. What this means is that the coating can dry so fast that it will form a film before the coating is properly saturated or worked into the roof surface, causing the coating to peel up and stick to the roller as it is being applied.
Contact your local Garland representative to learn more!