Flashing (weatherproofing) bark was occasionally used as a flashing material. Most flashing materials today are metal, plastic, rubber, or impregnated paper. Metal flashing materials include lead, aluminium, copper, stainless steel, zinc alloy, other architectural metals or a metal with a coating such as galvanized steel, lead-coated copper, anodized aluminum, terne-coated copper, galvalume (aluminum-zinc alloy coated sheet steel), and metals similar to stone-coated metal roofing. Metal flashing should be provided with expansion joints on long runs to prevent deformation of the metal sheets due to expansion and contraction, and should not stain or be stained by adjacent materials or react chemically with them.
What It Is! (Kahil El'Zabar album) drummer and bandleader steers an impressive quartet, composed of some of the newer generations of the AACM, and emphasizes blues, swing and groove." The All About Jazz review by Troy Collins says "Whether navigating funky R&B, modal post-bop or expressionistic abstraction, El'Zabar's young sidemen invest their efforts with palpable conviction, imparting even textbook extrapolations with heartfelt urgency." In his review for "JazzTimes" David Whiteis states "As Howard Mandel’s liner notes assure us, this music is 'neither avant-garde nor old guard.' It’s unselfconsciously both contemporary and roots-rich, and it resonates with the joy of invention." What It Is! (Kahil El'Zabar album)