BASF, SPEC MIX Combine Forces Words: Dan Kamys BASF, SPEC MIX Combine Forces The Wall Systems business of BASF Corp. and SPEC MIX Inc. have reached a joint marketing agreement. The program enables contractors to combine the advantages of BASF’s stucco finishes, water-resistive barriers, reinforcing base coats and PermaLath 1,000 fiberglass lath with computer-batched SPEC MIX Fiber Base Coat stucco in systems that are covered by a single source warranty.