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3M™ Photo Film Splicing Tape 8421 White, 1 in x 72 yd 2.5 mil, 36 per case Bulk

3M ID  70009272017    UPC#  00021200057502    3M Product Number  8421     
Designed for splicing of photographic film processing, 3M™ Photo Film Splicing Tape 8421 is a creamy white splicing tape featuring a thin, yet strong, polyester backing. It features an aggressive, versatile rubber adhesive that is both solvent and chemical resistant.
  • Used for splicing of most photographic film and web processing
  • Aggressive rubber adhesive grabs quickly and adheres well to a variety of films
  • Excellent solvent and chemical resistance, especially those found in photographic processes
  • Remains flexible at -60ºF (-50ºC) and is dimensionally stable up to 300ºF (150ºC)
  • White backing is used to easily identify splices
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Rubber Adhesive Offers High Tack with Excellent Chemical Resistance
The durable backing of 3M™ Photo Film Splicing Tape 8421 is ideal for splicing most film for web and photo processing. The white backing is identifiable in splicing applications. In addition, the polyester provides additional abrasion protection for sealing, edging and color-coding. The rubber adhesive sticks well to a variety of films, offers excellent chemical and solvent resistance, and features high shear strength. The tape remains flexible at -60ºF (-50ºC) and is dimensionally stable up to 300ºF (150ºC).

Recommended Applications
  • Splicing of most photographic film through the chemical developing process
  • General wide web splicing, including butt splicing and core starting
  • Sealing, color-coding, protecting and edging where a higher tack rubber adhesive is needed
  • Defect marking


 Adhesion Strength‎‎ 50 oz/in
 Adhesion Strength (metric)‎‎ 54 N/100mm
 Adhesive Type‎‎ Rubber
 Applications‎‎ Butt Splicing and Core Starting
 Backing Material‎‎ Polyester
 Backing Thickness‎‎ 1.4 mil
 Backing Thickness (metric)‎‎ 0.04 mm
 Brand‎‎ 3M
 Color‎‎ White
 Consumer Label‎‎ No
 Elongation‎‎ 140 Percent
 Facestock‎‎ Polyester
 Industries‎‎ General Industrial,‎ Print
 Length‎‎ 72 Linear Yard
 Length (Metric)‎‎ 65.83 m
 Maximum Operating Temperature (Celsius)‎‎ 149 Degree Celsius
 Maximum Operating Temperature (Fahrenheit)‎‎ 300 Degree Fahrenheit
 Minimum Operating Temperature (Fahrenheit)‎‎ -60 Degree Fahrenheit
 Product Form‎‎ Roll
 Shelf Life in Months (from date of manufacture)‎‎ 18
 Tape Thickness‎‎ 2.5 Milli-inch (mil)
 Tensile Strength‎‎ 43 lb/in
 Tensile Strength (metric)‎‎ 754 N/100mm
 Width‎‎ 1 Inch
 Width (Metric)‎‎ 25.4 mm