Sun Master IV-SR Greenhouse Film From Lumite Inc.
The Sun Master IV-SR is a long-life greenhouse covering (film) that lasts for four years and is “resistant to sulfur.” Most of the long-life films sold in the U.S. are clear and use a UV inhibitor called HALS to extend the life of the basic film. Some growers burn sulfur in their greenhouses, especially rose growers, and that sulfur attacks HALS in the film and reduces the life of the film. With the Sun Master IV–SR, that will not happen, and the film will last for four years. This film is slightly green in color and has a light transmission value of 86 percent.