SmartSign "Restricted Area: Clean Room Personnel Only", Vinyl Label, 10" x 14" 4 mil thick vinyl with clear laminate Protective laminate is graffiti-resistant and resists abrasions and chemical attack. Most competitive labels are not over laminated Withstands chemical splash; Use indoors or outdoors; Glossy finish wipes clean Aggressive acrylic adhesive. Easy to apply, just peel off liner. Patented "Air Release" adhesive from 3M means bubble-free application