Viking Cleanroom Thread On Cover Plate Assemblies are low-profile covers intended for use in cleanroom environments with Viking Mirage® Quick Response Concealed Pendent Sprinkle and MRI Sprinkler concealed-pendent-mri-sprinklers-non-ferrous. The silicone cover gasket is pre-assembled with the concealed cover for an acceptable sprinkler seal for use in a cleanroom or clean zone. The cover assembly is installed flush with the ceiling to provide a smooth appearance, and is available in several standard decorative finishes to meet design requirements.