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3 Lead Foil Tape 420 (Linered) • 421 Technical Data April 2015 Product Description 3M™ Lead Foil Tape 420 and 421 are backed with a rubber adhesive, offering excellent conformability in a variety of application conditions, indoors and out. Product Construction Backing Adhesive Color Liner Standard Roll Length Lead foil Rubber (green) Dark silver Clear, easy-release film (3M tape 420) 36 yds. (33 m) Typical Physical Properties Note: The following technical information and data should be considered representative or typical only and should not be used for specification purposes. ASTM Test Method Adhesion to Steel: 3M tape 420 45 oz./in. width (49 N/100 mm) 3M tape 421 45 oz./in. width (34 N/100 mm) D-3330 Tensile Strength : 3M tape 420 20 lbs./in. width (350 N/100 mm) 3M tape 421 15 lbs./in. width (263 N/100 mm) D-3759 D-3759 Elongation at Break: 3M tape 420 12% 3M tape 421 14% D-3759 Backing Thickness: 3M tape 420 4.7 mils (0.12 mm) 3M tape 421 4.0 mils (0.10 mm) D-3652 Tape Thickness: 3M tape 420 6.8 mils (0.17 mm) 3M tape 421 6.3 mils (0.16 mm) D-3652 Liner Thickness: 3M tape 420 3.5 mils (0.09 mm) D-3652 Temperature Use Range: -60° to 225°F (-51° to 107°C) Water Vapor Transmission Rate: 0.1g H2O/100 sq. in./24 hrs. (1.55 g/m2/24 hrs.) Weight: D-3833 3M tape 420 0.075 lbs./yd./in. width (0.0375 kg/m/24 mm) 3M tape 421 0.06 lbs./yd./in. width (0.034 kg/m/24 mm) 3M™ Lead Foil Tape 420 (Linered) • 421 Features • Very good conformability. • Good thermal properties and will perform over a wide variety of temperature conditions (-60° to 225°F or -54° to 106°C). It has been used at higher temperatures for shorter duration. • Electrically and thermally conductive. • Can be die-cut into specific shapes. • This material when disposed of separately is classified as RCRA hazardous waste. Please consult applicable Federal, State and local regulations for proper disposal. • Elevated lead levels in water may result from long term submersion of this product. • Best results are obtained when applied to a clean dry surface above 32°F (0°C). Also, by “feathering” the edges – rubbing the tape down with a smooth-edged plastic piece (or similar object) – the tape can be made to better conform to the substrate. This is especially important if the tape is to be used as a “thief” in electroplating where the edges must fully contact the metal base. Application Ideas • Electroplating • X-ray plate masking • Radiation barrier • Maskant during paint stripping • Moisture barrier • Add weight (balance) to equipment parts (golf clubs, tennis rackets, etc.) • Chemical milling Disposal and Safety Considerations • Wear protective gloves and/or wash hands after working with tape. • Lead will slowly leach into water when submerged. Leaching will accelerate as acidity increases. • This material when disposed of separately is classified as RCRA hazardous waste. Please consult applicable Federal, State and local regulations for proper disposal. Storage Store under normal conditions of 60° to 80°F (16° to 27°C) and 40 to 60% R.H. in the original carton. Shelf Life To obtain best performance, use this product within 18 months from date of manufacture. -2- 3M™ Lead Foil Tape 420 (Linered) • 421 Technical Information The technical information, recommendations and other statements contained in this document are based upon tests or experience that 3M believes are reliable, but the accuracy or completeness of such information is not guaranteed. Warranty, Limited Remedy, and Disclaimer Many factors beyond 3M’s control and uniquely with user’s knowledge and control can affect the use and performance of a 3M product in a particular application. User is solely responsible for evaluating the 3M product and determining whether it is fit for a particular purpose and suitable for user’s method of application. Unless an additional warranty is specifically stated on the applicable 3M product packaging or product literature, 3M warrants that each 3M product meets the applicable 3M product specification at the time 3M ships the product. 3M MAKES NO OTHER WARRANTIES OR CONDITIONS, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OR CONDITION OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OR ANY IMPLIED WARRANTY OR CONDITION ARISING OUT OF A COURSE OF DEALING, CUSTOM OR USAGE OF TRADE. If the 3M product does not conform to this warranty, then the sole and exclusive remedy is, at 3M’s option, replacement of the 3M product or refund of the purchase price. Limitation of Liability Except where prohibited by law, 3M will not be liable for any loss or damage arising from the 3M product, whether direct, indirect, special, incidental or consequential, regardless of the legal theory asserted, including warranty, contract, negligence or strict liability. ISO 9001: 2000 This Industrial Adhesives and Tapes Division product was manufactured under a 3M quality system registered to ISO 9001: 2000 standards. 3 Industrial Adhesives and Tapes Division 3M Center, Building 225-3S-06 St. Paul, MN 55144-1000 800-362-3550 www.3M.com/industrial Recycled Paper 40% pre-consumer 10% post-consumer -3- 3M is a trademark of 3M Company. Printed in U.S.A. ©3M 2015 (E)70-0709-5011-1 (4/15)