Apply when the temperature is 50*F (12*C) minimum, 90*F (32*C) maximum (air, surface and material), at least 5*F above dew point. The relative humidity should be 85% maximum. Ideal temperature is 77*F with 50% relative humidity. Do not apply late in the day were dew can settle on the fresh wet paint not allowing it to dry properly. Do not apply if rain is threatening or forecasted.