Crossword clues for Protective layerAnswerClueOZONEGas in a protective layerLINERProtective layerBARKTree's protective layerSHIELDProtective layerOZONEKind of layer protecting the earthOILSKINOuter-layer protectionSHEATHECover in a protective layerOZONEVital part of the stratosphere's protective layerSKINProtective layerARMORSAdds protective layersOZONEProtective layerHENProtective layerENAMELProtective molar layerTESTASeed's protective outer layerSEEDCOATSProtective botanical layersSKINProtective outer layerOZONEProtective atmospheric layerENAMELProtective tooth layerPRIMERFirst layer of furniture protection