The secret of Pilkington Activ self-cleaning glass lies in its special coating, which works to keep your windows clean in two stages:
Using a "photocatalytic" process, the Activ glass coating reacts with ultra-violet rays from the natural daylight to break down and disintegrate organic dirt...
Rain water washes the glass clean! Because Activ glass is "hydrophilic" water spreads evenly over the surface, instead of beading or forming droplets. As it runs off, it carries the dirt away with it. Activ glass also dries off very quickly, so it does not leave unsightly drying spots. And if you experience a dry spell, running a garden house on windows with Activ glass does the job too!
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Water beads and dries, leaving spots on regular glass (left side).
Water sheets right off Activ glass, leaving no spots! (right side)