The Polyken® filler tapes are designed as an underlying filler material prior to the application of Polyken® coating systems and Covalence Heat Shrinkable Products. The elastomeric formulation is very conformable, making it ideal for filling in transition areas around tees, elbows, valves, specials, welded and coupled field joints. The filler tapes maintain flexibility over a wide temperature range and under various conditions encountered in the field. The 939 is a thick mastic-like butyl rubber filler designed to fill and smooth transition areas. The semi-tacky composition remains flexible and is easily molded in filler to conform around irregular shapes. Polyken® 939 comes in rope or flat tape form and in a variety of thicknesses to meet almost any job requirement.
