Designed to be fast activating after installation, CertaSeal™ is a high-grade adhesive made from a proprietary blend of asphalts and polymers that seals shingles together on the roof to safeguard against wind uplift, shingle blow off, and moisture infiltration. Unlike harder sealants that can dry out and crack over time, CertaSeal is designed to remain pliable and accommodate the slight structural shifts caused by years of temperature and weather changes, all while protecting homes from wind and wet weather year round.