ADAptive is an ADA-compliant door sill system that does more and goes further, delivering improved performance, unmatched versatility and a simplified assembly. Tired of service calls or door replacement due to leaking ADAcompliant sills? ADAptive addresses infiltration at its most common sources like beneath the sill. A full-length caulking strip helps installers provide a complete barrier against infiltration beneath the sill. The caulking strip simply snaps into the bottom of the sill.