On average, roofing tar will dry in 8-24 hours. Whether the tar dries on the lower or higher end of this period is dependent upon weather conditions. Damp elements, such as dew, rain, and humidity, will prolong the drying process.

Does roof tar ever dry?

Though the application of the tar doesn’t take a long time, the drying or curing period certainly does. … Yes, tar can be applied to a roof in temperatures as low as 40 degrees Fahrenheit. However it won’t properly dry and seal until the temperature is at least 70 degrees.

Is roofing tar waterproof?

Roofing tar is quite versatile, and this durable waterproof substance provides protection from water, UV rays, sunlight, and cold weather.