Sealant works well on a commercial roof when it goes in the right places. Here's how to match sealant to your roof, apply it so it holds up in Texas heat, and tell when a full coating system makes more sense.

Roof coatings get written off as paint, oversold as a cure-all, or dismissed as a short-term patch. Here's what they actually do, where they fall short, and how to tell if your roof is a good candidate.