Which component is NOT part of asphalt shingles?

Asphalt shingles are primarily composed of several key components that contribute to their functionality and durability. Granule surfacing, sealing strips, and organic felt are all standard parts of traditional asphalt shingles.

Granule surfacing provides a protective layer that helps shield the shingles from UV rays, weathering, and physical damage while also contributing to aesthetic appeal by providing color and texture. Sealing strips create an adhesive bond between individual shingles, helping to prevent wind uplift and improving overall performance.

Organic felt serves as a reinforcement layer, providing structural support and enhancing the durability of the shingles. It is typically made from cellulose fibers and is treated for water resistance.

Synthetic rubber, while it may be used in some modern roofing materials for flexibility and waterproofing, is not a traditional component of asphalt shingles. Therefore, it is the correct answer, as it does not belong to the standard makeup of asphalt shingles.