Better alternative: Gravel and other porous materials are best for driveways, because they allow rainwater to sink into the ground, where it’s filtered and won’t inundate water treatment plants. But if you do seal blacktop, pick asphalt sealant and stay away from any product that has coal tar in its name (or products simply called “driveway sealant”). Lowe’s and Home Depot have already banned the bad stuff, but smaller hardware stores may still carry it.
See also: Have the Healthiest Home on the Block, Part 3: The Patio.
Published on: April 22, 2009
Updated on: September 9, 2011