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Application Guide - General Guidelines

Painting Environment

Awlgrip Urethane Topcoats require three cure cycles.

First Cure Cycle: This cycle requires 12–24 hours at the standard conditions of 77°F (25°C), 50% R.H. When this stage is complete the painted surface can be handled; masking tape can be applied for striping and the finish appears to be dry. The coating can now be exposed to weather.

Second Cure Cycle: The second cure requires 72–96 hours at 77°F (25°C), 50% R.H. During this stage the film becomes much harder. Abrasion and chemical resistance develop. After the second cure cycle is complete the boat can be safely returned to limited service.

Third Cure Cycle: This third cycle requires 14–21 days at 77°F (25°C), 50% R.H. During this time the coating develops all its physical properties. The casual observer may not be able to determine a significant difference between Cycle 2 and Cycle 3. However, the cure is not complete during Cycle 2 and severe service conditions should be avoided.

These cure calculations are based on exposure at standard conditions (77°F (25°C), 50% R.H.) and with coatings applied at the recommended film thickness.

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Caution

Cure rates are subject to many variables. These include, but are not limited to: ambient temperature, substrate temperature, relative humidity, applied film thickness, reducer selection, use of accelerators, retarders and air flow. Temperatures warmer than the standard conditions of 77°F (25°C), 50% R.H. will speed dry and cure times. Cooler temperatures will create slower dry and cure times.

Moisture Complications

Moisture on the surface can be disastrous. Problems are noticable when moisture comes in contact with the Awlgrip or Awlcraft 2000 Topcoats before they complete the first stage of curing.

Results can be:


  • overall loss of gloss and image

  • flat spots

  • a rough or grainy surface

  • blistering


These problems can also occur as a result of overcoating a primed surface that has not adequately cured or applying the topcoat to a surface that is contaminated with moisture.

Avoid applying topcoats in situations where rain, dew, fog or other condensation can contact the paint surface before the coating has completed the first stage of cure. Whenever feasible, erect some kind of cover or shade over the work area. This cover will help keep dew from the curing finish.

Condensation occurs when the air becomes completely saturated with moisture and the temperature drops below the dew point. At standard conditions (77°F (25°C), 50% R.H.), avoid applying topcoats when the temperature could drop below the dew point within 6–8 hours after the application.