3M™ 3635-91 2 Mil Day/Night Film is a specialized translucent cast vinyl designed for internally illuminated signage that changes appearance between day and night. During daylight, the film appears smoke gray or dark in incident light, and when backlit at night, it transmits the light source color (typically white) for high visibility in illuminated signs. This film is part of 3M’s Day/Night Light Management Films and is ideal for use on backlit channel letters, sign faces, and displays where you want one graphic look in ambient light and another when illuminated. It features a matte, translucent finish with approximately 47% light transmission and offers long-term outdoor performance when applied correctly.

Unique Features

• 2 Mil Thickness
• Dramatic Day/Night Visual Effect
• Appears Dark in Daylight, Bright When Backlit
• Designed for Internally Illuminated Signage
• Matte, Translucent Finish Reduces Glare
• Enables High-Contrast Nighttime Visibility
• Compatible With Colored Translucent Films
• Reliable Pressure-Sensitive Adhesive
• 5 Year Durability

Applications

• Internally Illuminated Sign Faces
• Backlit Channel Letters
• Day/Night Signage Requiring Visual Contrast
• Retail and Commercial Illuminated Displays
• Architectural Lightbox Graphics
• Acrylic and Polycarbonate Sign Panels
• Applications Requiring Dark Daytime and Bright Nighttime Appearance