Warema produces a range of "Dim Out" external venetian blinds with superior light blocking and exterior sun shading capability. In addition to reducing solar heat gain, eliminating glare and redirecting daylight, dim out external venetian blinds have features such as rubberised seals on the slats edges, tilting bottom rails, much smaller penetrations in the slats where the lifting tapes pass through and optional seals in the side guide rails which are all designed to prevent light from entering through and around the edges of the blinds. External sun shading with additional benefits. All aluminium and fully retractable dim out external venetian blinds are ideal for bedrooms, audio visual rooms, boardrooms, laboratories or anywhere where light levels need to be tightly controlled for comfort or performance.