425 3M | Alldatasheet
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425 Aluminium Foil Tape
(No. 427 Linered Version) Product Data Sheet Updated : March 1996 Supersedes : October 1993 Product Description A dead soft aluminium foil combined with a special transparent synthetic acrylic adhesive makes this the best general purpose foil product available. No's. 425 and 427 have U.L. approval Class "L" for low flammability. Can be used indoors or out for long term applications. Physical Properties Not for specification purposes Adhesive Type Acrylic Backing Dead soft aluminium. Thickness (ASTM D-3652) 110 µm Release Liner (No. 427 only) Easy release paper. Release Liner 80 µm Backing Thickness 80 µm Weight .0068 kg/m/25mm Tape Colour Silver (shiny) Shelf Life 12 months from date of despatch by 3M when stored in the original carton at 21°C (70°F) & 50 % Relative Humidity Performance Characteristics Not for specification purposes Adhesion to Stainless Steel ASTM D-3330
5.9 N/10mm
53.7 N/10mm
7 % Temperature Range Maximum Minimum +150 °C -54 °C Water Vapour Transmission Rate 1.55 g water/m² 24hr.
Date : March 1996 (No. 427 Linered Version) Additional Product Information Reflective backing provides excellent radiation for both heat and light. The very low moisture vapour transmission rate makes No. 425 a good sealant. The special permanent adhesive combined with the rugged, durable backing gives ideal properties for long service life both indoors and out. Good as a maskant in electroplating of aluminium, since it will not contaminate the bath. Easily die-cut into a special size or shape (suggest use of No. 427 linered). Performance range from -55 °C to 150 °C continuously. Higher temperatures for shorter periods. Application Techniques Best results are attained when applied to a clean, dry and non dusty surface above 0°C. To improve adhesion ensure firm and even application pressure is applied. Applications General sealant indoors and out. Repair tears on truck trailers and aircraft. Moisture barrier e.g. around windows in aircraft, buses and in appliances. Electroplating of aluminium. General purpose heat reflector. Mechanically holds wires and cooling coils to appliance walls. Acts as good heat source for defrosting, and evens out cold temperature. Splicing of thin gauge foils. General purpose holding, patching, sealing applications. FEATURES ADVANTAGES BENEFITS Aluminium foil backing. Synthetic adhesive. Long term protection. Heat reflective. Non-flammable. Long ageing. Protects parts from water, dust or chemical damage. Protects parts from heat. Will not aid combustion. Reduces need for replacing.
Date : March 1996 (No. 427 Linered Version) "L" Low. 3M is a trademark of the 3M Company. Values presented have been determined by standard test methods and are average values not to be used for specification purposes. Our recommendations on the use of our products are based on tests believed to be reliable but we would ask that you conduct your own tests to determine their suitability for your applications. This is because 3M cannot accept any responsibility or liability direct or consequential for loss or damage caused as a result of our recommendations. Specialty Tapes & Adhesives 3M United Kingdom PLC 1996 3M United Kingdom PLC 3M House,
28 Great Jackson Street,
Manchester, M15 4PA Customer Service : Tel 0161 236 8500 Fax 0161 237 1105 3M Ireland 3M House, Adelphi Centre, Upper Georges Street, Dun Laoghaire,Co. Dublin, Ireland Customer Service : Tel (01) 280 3555 Fax (01) 280 3509