What is a common characteristic of self-sealing shingles?

Self-sealing shingles are designed with an adhesive strip that allows them to bond together when exposed to heat, such as during sunny weather. This adhesive feature is a hallmark of self-sealing shingles, ensuring that they adhere securely to one another and to the roof, which helps to prevent water infiltration and wind uplift. This characteristic enhances the shingle's durability and effectiveness in various weather conditions, making it a preferred choice for many roofing projects.

The other answers do not accurately reflect the defining traits of self-sealing shingles. While some shingles may be heavy or made from recycled materials, these attributes are not specific to self-sealing versions. Additionally, they do not require special installation techniques distinct from standard shingle installation, allowing for a straightforward application process.