THE Blockout Roller Shutter insulation qualities are superior to any other product on the market. The shutters will cut down summer heat intake by up to 90 per cent, block out light by 99 per cent and reduce outside noise levels by up to 10 decibels. Blockout Shutters protect property from fires, hailstones and storms. Blockout Shutters are suitable for doors, vehicles, shop fronts, display units, windows and roofs of varying shapes and curvature.