MARVIN JOLES
IN THE MIX
SEALER...
MARVIN JOLES
What It Is and Its Application?
If I could show you my DMs( don’ t worry, nothing to hide here), you would likely be surprised by the amount of sealcoating questions I field. It’ s quite a lot. I imagine the only people who may get more questions about this topic are the manufacturers … maybe. I answer every single one, even if it consumes a good chunk of my time. I figure they come here because they aren’ t getting the responses they are looking for in their previous searches. In a continuous effort to help minimize the time spent on this subject while leaving out major brand names, I hope to shed some light on what the three major sealer types are( I know there will be an argument for gilsonite), what they are made of and how to apply them. Let’ s get into it. Each have distinct compositions and application methods, tailored to protect asphalt surfaces from wear, weather and chemical damage.
Coal-Tar Based Sealer:
Composition: Derived from coal tar and a byproduct of coal processing, these sealers are mixed with water, silica sand and additives like polymers for enhanced durability. They often include emulsifying agents to maintain a stable mixture. Application: Applied in a thin layer or two, using a squeegee, spray system or brush. The surface must be clean and dry, with cracks filled beforehand. Application usually requires good weather( warmer than 50 ° F, no rain forecast for 24-48 hours) but coal tar has a good reputation for performing well later in the year when temps drop some. Curing takes 24-48 hours, during which the area should be coned off to prevent traffic. Notes: Known for resistance to oil and gas, and its performance under trees and UV damage, coal tar sealers are durable but have a strong odor, can burn skin and hold environmental concerns due to volatile organic compounds( VOCs).
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