Dow Corning® 999 Sealant

Snow Retention Accessories

For Sno Gem® Products

Dow Corning® 999 Sealant in clear is a recommended accessory for snow guards installed on a polycarbonate daylighting roof panel. When applied to the snow guard’s entire perimeter (4 sides), it creates a watertight seal with the polycarbonate roof system, ensuring proper installation. To be used in conjunction with 3M VHB Tape application, only.


  • Original Polycarbonate™ Snow Guard
  • 2” Wide Junior Polycarbonate™ Snow Guard
  • 1.5” Wide Junior Polycarbonate™ Snow Guard