All American Rolling Shutters completely block out all light when closed. They can be used to keep out light when sleeping, or eliminate glare when watching television. Sun control may be the biggest benefit of rolling shutters in Colorado due to the intense sunlight and UV ratings. When closed, rolling shutters block out all of the sun's light, and Colorado's intense UV rays and most of the heat. As energy costs rise, the savings can be substantial.
Everything there is to know about propolis. Propolis is a 100% natural, antimicrobial substance made from plant resins, which is collected by honeybees (Apis mellifera) along with the nectar and pollen they need for food. It is also known as 'bee glue' and sometimes as 'hive dross'.
Finally, tests are undertaken to make sure that nothing else remains in the propolis which should not be there, and the substance can then be used in the manufacture of various products. Propolis is such a stable material that, as long as it is kept in the dark in sealed containers, it can be stored for years without degrading or losing its useful properties.