HS 3220 Series Silicone Skylight Coating is a dispersion of silicone rubber. This coating is a one-part, ready-to-use material that can be applied easily to a dry, frost-free surface, and cures at normal temperature in 1 to 4 hours by reacting with moisture in the air. For applications with lower than normal humidity levels, expect the cure time to be longer.
Designed to be applied over skylights, the translucent color allows natural light into the building. This product is also imperative for rooftop safety, as coating over a skylight panel will hide the panel and poses a fall-hazard.
Storage and Shelf Life:
HS 3220 Series has a recommended shelf life of 12 months from the date of manufacture when stored in unopened containers between 40°F and 80°F. Refer to product packaging for date of manufacture.
Prep: Prior to starting your roofing project, prep the roof by power-washing, removing dirt and debris, and making any necessary repairs. Ensure skylight surface is completely dry prior to applying silicone. For more detailed preparation instructions, view our Technical Resources page.
Mix: It is recommended that any silicone product be mixed with a drill mixer for ~5 minutes prior to application.
Application: The recommended application rate is 30 mils (app. 2.25 gal per sq.) and should be applied in a minimum of two coats to eliminate sag or runoff.
Equipment: Our Translucent Skylight Coating should be applied via spray equipment (We recommend the Graco 933) or roll-applied using a medium nap roller.
Cure Time: Our Translucent Skylight Coating cures in 1-4 hours under normal weather conditions and is tack-free in 1-2 hours. Because conditions vary, it is recommended that you exercise caution prior to walking on recently applied coating.
Weather Restrictions: To ensure optimum performance, it is recommended that you do not apply this product when surface temperatures are below 40 degrees. In cold-weather applications, material should be kept indoors until immediately before application. It is also recommended that you do not apply this material while rain is falling. Rain will not cause silicone to wash off, but the substrate will become wet and will negatively impact adhesion.
For more detailed application instructions, check out our installation specifications.