Self-Healing Membrane 
     If cut or punctured it will repair itself due to its elastic recovery and high level of adhesion. 
     Therefore, Watertight requires little or no maintenance over many years making it very cost effective. 

Extremely high elongation and flexibility mean that Watertight will withstand high levels of movement without failing. This property continues for many years because Watertight does not degrade significantly as it contains no plasticisers. 

Watertight has been tested according to ASTM D412 Elongation & Tensile Strength Test. Watertight stretched beyond , capacity of the machine to an excellent 1000% without breaking. 
Technical Specification 
Properties of the Dried Membrane
Colour Black 
Thickness                        Normally 4mm, but from 2mm to 5mm depending on circumstances
Heat Flow Resistance      No slump after 2 hrs (80°C on vertical) or after 4 hrs (120°C on 75° slope) -                                 
                                       27°C (Highways crack elongation test)                                                 

Cold Temperature Resistance Elongation at Break Weathering Resistance Physiological Properties
                                                               i> 1000% (Did not break when tested to ASTM D412)
, Elongation remained > 1000% after 1000 hours QUV accelerated ageing Non-toxic during application and as dried membrane