The Benefits of Sealcoating

Teri Kasprzak / May 12, 2010   |   Education / Sealcoating

Sealcoating is one of the most important elements of a pavement management plan. A sealcoat consists of either coal tar pitch or asphalt cement mixed with inert fillers, water, emulsifying agents, or additives. Applied in thin coats, pavement sealing is used to protect off-highway pavement surfaces against gasoline, oil, salt, water, and ultraviolet rays. When covered with a dark black sealant, pavement looks and wears like new. Parking lot sealcoating helps to project a positive image of the company and facility.

There are also many green alternative coatings that enhance solar reflectivity and are very cost effective:

Solar Reflective Coating being applied
Solar reflective coating being applied

Solar Reflective Coatings are a premium quality, highly pigmented, polymeric surfacing system designed for heat reduction of parking surfaces. The product is formulated with infrared reflective pigments to reduce solar absorption, increase reflectance and achieves a desired solar reflectance index (SRI) of up to 40%. It contains no PAHs, has an extremely low VOC content, is fuel-resistant and is non-fading.

Here are more benefits of traditional sealcoating:


When covered with a dark black sealant, pavement looks and wears like new. Parking lot sealcoating helps to project a positive image of the company, facility, or residential complex.

Slows oxidation and water penetration

Sealcoating fills surface voids, which reduces exposure to oxygen and UV rays and reduces the depth to which oil or gas can penetrate the pavement.

Sealcoating acts as a waterproofing agent, minimizing the rate at which water enters pavement. Without it, water can permeate more freely resulting in freeze/thaw expansion and contraction of the pavement.

Sealcoating resists oil and gas spills

Gasoline dripping from a topped-off fuel tank during hot weather can soften and break down unsealed asphalt pavements. Coal tars used in sealcoat are impervious to gas and oil spills.

Traditional sealcoat being applied
Traditional sealcoat being applied

Sealcoating increases pavement flexibility

Sealcoat brings a dark black color to the pavement. The blacker it is, the more heat a pavement draws from the sun. And, the hotter it gets, the more pliable it becomes, which helps it to withstand traffic without cracking.

Do you have any questions about seal coating? Whether it’s regarding traditional sealers or environmentally friendly coatings, submit a question and one of our pavement management experts will be happy to help!

If you would like to take a more detailed look at the benefits offered by sealcoating as part of your parking lot maintenance program, please read our dedicated blog post.