Polywater® Prelube 5000 reduces frictional drag during the blowing of small diameter fiber optic microcable into microtube duct. It increases the length of cable that can be blown in a single shot. Prelube 5000 is more concentrated, yet less viscous, than Prelube 2000 (for blowing conventional fiber cables). The improved chemistry allows this product to spread further and reduce friction at extremely low coating levels. The lower viscosity allows practical application into the microtubes.