STP Limited offers Waterproofing Membrane with Glassfibre Matt Reinforcement. STP Limited has been certified with the ISO 9001:2000 and ISO 14001:1996 certifications. The Waterproofing Membrane with Glassfibre Matt Reinforcement is produced from a blend of special grade thermoplastic polymers and distilled bitumen. The combination gives the proven waterproofing qualities of bitumen plasticity, resistance to heat, ageing and weathering, and ease of application by torch welding.