Crosslinked modified shingle adhesive

It is known to use adhesives to provide a bond between shingles on a roof. Some shingle adhesives are made with blends of asphalt and polymer. During a typical shingle manufacturing process, a pattern of adhesive is applied to the headlap portion of the shingles, so that the tab portion of the subsequently laid course of shingles on the roof will adhere to the headlap portion of the lower course. The adhesive bond helps to prevent wind uplift of the shingles on the roof. It is also known to use adhesives to provide a bond between overlay and underlay portions of a laminated shingle. An adhesive for a roof covering comprises asphalt, polymer and crosslinker. The crosslinker is a phenolic resin or a phenol-aldehyde resin. In another embodiment, the adhesive comprises asphalt, polymer and crosslinker, and it excludes polyfunctional amine having at least two amino groups.