METALNASTRI ANTICORROSION SYSTEMS Metalnastri DoubleShield 3.3 (Metalnastri “MNDS300”) The anticorrosion tape “Metalnastri DoubleShield 3.3” is a new concept of technology based on a double active-passive protection barrier. The product is a compound between two different layers of material: a sacrificial anode as inner layer and a sealing membrane as outer layer. The result is an unique and effective product that provides active protection to the metal surface that has to be covered with, “Metalnastri and a physical-chemical passive protection. DoubleShield environmentally friendly. It is designed to protect permanently underground structures, providing protection for the life-span of the same and virtually avoiding any future maintenance. DESCRIPTION The product “Metalnastri DoubleShield 3.3” is a coupling between an electro-conductive adhesive laminar zinc tape with the main purpose of active protection, and a self-adhesive membrane made from a polymermodified bitumen with a HDPE carrier foil that performs as external sealing, working as a barrier for physical and chemical protection. FEATURES Active protection: is provided by the sacrificial action of the high purity laminated zinc (>99.95%) by its electroconductive adhesive which ensures a positive electric connections between the metal substrate and the zinc so that it can act as a sacrificial galvanic anode. Passive protection: is given by the top coat bonded to the zinc foil, this is composed of a membrane made from a polymer-modified bitumen with HDPE carrier foil which bonds in an excellent way to the zinc, sealing and protecting it against any external attack and any mechanical damages Chemical protection: the special composition of the outer coat provides a resistance to all the aggressive substances that naturally occur in soils.

METALNASTRI ANTICORROSION SYSTEMS MAIN USES “Metalnastri DoubleShield 3.3” is used mainly for: - underground pipes; steel pole for the public lighting; underground steel storage tanks; joining under-ground and above-ground steel structures ACTIVE PROTECTION An anticorrosion protection by means of insulating coating ( paintings, plastics, rubber and so on) achieves exclusively a passive protection of the surface. DoubleShield 3.3 coating with electro-conductive adhesive, manufactured by Metalnastri, represents an effective step ahead in the technique of protection against spontaneous corrosion...

Composition Membrane Zinc foil Adhesive Paper TOTAL Zinc and Membrane TOTAL Zinc TOTAL Membrane Measuring Unit Kg/ m2 mm P °C Condition DIN EN 1296,DIN EN 1298 > +70°C storage period 12 weeks DIN EN 1109 DIN EN 1928, procedure B Water pressure 4 bar, 24 h. DIN 1931, procedure B DIN EN 12311-2, procedure A DIN EN 12311-2, procedure A EN 12310-1 Value 1.1 1.0 200 + 3° Immediate Shape stability No cracks at 5°C Impermeable SD= 320m, p= 2744000 Longitudinal > 90//50mm Transvers > 70//50mm Longitudinal > 900 % Transvers > 700 % Longitudinal 125 N Transvers 65 N Black Value 0,080 (-0,005/+0,020) >...