3/4-5-421 Datasheet 3/4-5-421 | P1-P3

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) D-3330

3M tape 421 45 oz./in. width (34 N/100 mm)

Tensile Strength : 3M tape 420 20 lbs./in. width (350 N/100 mm) D-3759

3M tape 421 15 lbs./in. width (263 N/100 mm) D-3759

Elongation at Break: 3M tape 420 12% D-3759

3M tape 421 14%

Backing Thickness: 3M tape 420 4.7 mils (0.12 mm) D-3652

3M tape 421 4.0 mils (0.10 mm)

Tape Thickness: 3M tape 420 6.8 mils (0.17 mm) D-3652

3M tape 421 6.3 mils (0.16 mm)

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 0.1g H

O/100 sq. in./24 hrs. D-3833

Transmission Rate: (1.55 g/m

/24 hrs.)

Weight: 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)

™

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

• Radiation barrier

• Moisture barrier

• Chemical milling

• X-ray plate masking

• Maskant during paint stripping

• Add weight (balance) to equipment parts

(golf clubs, tennis rackets, etc.)

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.

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™

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.

Industrial Adhesives and Tapes Division

3M Center, Building 225-3S-06

St. Paul, MN 55144-1000

800-362-3550

www.3M.com/industrial

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Recycled Paper

40% pre-consumer

10% post-consumer

3M is a trademark of 3M Company.

Printed in U.S.A.

P1-P3

3/4-5-421

Mfr. #:

Buy 3/4-5-421

Manufacturer:

Description:

TAPE, 4.57M X 19.05MM, SILVER, LEAD FOIL, Tape Type:Thermally Conductive, Tape Backing Material:Lead Foil, Tape Width - Metric:19.05mm, Tape Width - Imperial:0.75", Tape Length - Metric:4.57m

Lifecycle:

New from this manufacturer.

Delivery:

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3/4-5-421