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3M 69

3M 69 Electrical Grade Glass Cloth Tape [Silicone Adhesive]

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2 Reviews
1 Question & Answers
  • Quantity
    View Full Pricing Table
    View "Full Pricing Table" below for detailed pricing and additional sizes!
  • Color
  • Roll Size *
    Purchased Most Frequently: 1/2 in. x 66 ft. (White) | See Pricing Table below for additional options.
  • Price
    $ Price/photo will update once color & size have been chosen.
Before ordering, please read the "Product Description & Specs" tab content for more information about this item.

Product Description

3M 69 Electrical Grade Glass Cloth Tape is a white glass cloth tape with a high-temperature thermosetting silicone pressure-sensitive adhesive. It is designed for use in 600-volt dry location applications motors, and transformers with and without varnish coating. Key attributes like high mechanical strength and resistance to high temperatures provide excellent performance. The thermosetting adhesive provides an increased bond once applied in areas of high ambient temperatures. The thermosetting adhesive provides elevated temperature performance up to Class N 392F (200C) temperature rating.

3M 69 provides insulation and solvent-resistant protection for use as coil cover, anchor, banding and core, layer and crossover insulation. This tape features a noncorrosive adhesive. It is conformable, printable and flame retardant.

Features & Benefits

  • High-temperature thermosetting adhesive has excellent solvent resistance.
  • Class B rating to Class H provides for high temperature resistance.
  • Glass cloth backing gives mechanical protection which lasts longer and improves safety.

Uses & Applications

  • Insulating electric and induction-type furnace power supply leads.
  • Securing high-temperature, non-PSA insulation (such as asbestos and glass) in high-temperature areas.
  • Securing Scotch® Fire Retardant Electric Arc Proofing Tape 77.
  • Splicing wire SF and SFF rated 302° F (150° C), 356° F (180° C) .
  • Reinsulating and repairing coils on mining machines.
  • Splicing silicone-covered glass wire where splices require more abrasion resistance and mechanical strength than can be provided by silicone tapes Insulating Class "H" dry-type transformer leads.
  • Insulating splices made on SA type wire in heat treat areas.
  • Especially suited to high-temperature applications.
  • Used in a variety of coil/transformer and motor applications, including an outer wrap for bobbin wound coils, banding arbor wound coils, lead pad hold down, end turn and lead anchor and connection.
Made in the U.S.


Technical Information

3M 69 Electrical Grade Glass Cloth Tape
  • Standards Met: Military Specification No. Mil-I-19166C; UL Recognized Component listing for 200C (Guide OANZ2, File E17385); CSA Accepted Component 180C, File LR93411; RoHS 2011/65/EU
  • Carrier/Backing: glass cloth
  • Adhesive: silicone   How are adhesives different?
  • Thickness: 7 mils (carrier, adhesive) 5 mils (carrier)   What is mil thickness?
  • Adhesion: 40 ounces per inch (to stainless steel test panel)
  • Tensile Strength: 180 pounds per inch (longitudinal)
  • Dielectric Breakdown: 3000 volts
  • Service/Operating Temperature: up to 392°F
  • Elongation: 5%
  • Core: 3" diameter
Note: Specifications are those given by manufacturers and are not tested for accuracy.

Alert Roll Sizes/Widths

Please note that tape rolls are NOT guaranteed to be splice-free. Tape rolls are typically cut to standard tape industry metric-cut sizes - or approx 5% narrower than the nominal size (i.e. 24mm per 1-inch of nominal width ordered).

Please contact us to inquire about pricing for full-cut widths (e.g. a 6 inch roll cut to exactly 152mm instead of 144mm).

Download Datasheets

Download Datasheets

The following downloads are available for this product:

Download Technical Data Sheet

69 Standard sizes


1/2 in. x 66 ft.

69/ 052250

Single Roll (1-49 Rolls)

1 - 4 Cases (50-249 Rolls)

5 - 9 Cases (250-499 Rolls)

10+ Cases (>= 500 Rolls)


a 6% discount

a 7% discount

a 9% discount





Nominal Tape Widths vs Actual Widths

Nominal vs. Actual Widths Zoom In

Tape rolls are cut to standard tape industry metric widths of approx. 24mm per 1-inch of nominal width ordered. As a result ACTUAL tape widths are normally 5% narrower than the NOMINAL width shown in inches. Examples:

  • 1" Nominal width = 15/16" (24mm) Actual width
  • 2" Nominal width = 1-7/8" (48mm) Actual width
  • 3" Nominal width = 2-13/16" (72mm) Actual width

Note that tape rolls are NOT guaranteed to be splice-free.

Custom Tape Widths
May be Available!

  • Need custom sized or "full-cut" width tapes? Many of our tapes come to our converter as full wide width "log rolls" (not pre-cut), and can be custom cut to widths not shown in the pricing table.
  • Contact us today for pricing and minimum requirements to order your desired tape in a custom width.
  • Please note that since this tape comes in "log roll" format most rolls ship on a plain white core (i.e. with no branding or text inside the core).

69 Special Order Sizes


3/4 in. x 36 yds. *36 yard length

Approximately 20 extra business days to ship
69/ 0753648

Single Roll (1-47 Rolls)

1 - 4 Cases (48, 96, 144, ... Rolls)

5 - 9 Cases (240, 288, 336, ... Rolls)

10+ Cases (480, 528, 576, ... Rolls)

1 case minimum

a 4% discount

a 6% discount

a 8% discount





3/4 in. x 66 ft.

Approximately 20 extra business days to ship
69/ 0752250

Single Roll (1-49 Rolls)

1 - 4 Cases (50, 100, 150, ... Rolls)

5 - 9 Cases (250, 300, 350, ... Rolls)

10+ Cases (500, 550, 600, ... Rolls)

1 case minimum

a 5% discount

a 7% discount

a 8% discount





1 in. x 36 yds. *36 yard length

Approximately 20 extra business days to ship
69/ 13636

Single Roll (1-35 Rolls)

1 - 4 Cases (36, 72, 108, ... Rolls)

5 - 9 Cases (180, 216, 252, ... Rolls)

10+ Cases (360, 396, 432, ... Rolls)

1 case minimum

a 4% discount

a 5% discount

a 7% discount





2 in. x 36 yds. *36 yard length

Approximately 20 extra business days to ship
69/ 23624

Single Roll (1-23 Rolls)

1 - 4 Cases (24, 48, 72, ... Rolls)

5 - 9 Cases (120, 144, 168, ... Rolls)

10+ Cases (240, 264, 288, ... Rolls)

1 case minimum

a 3% discount

a 4% discount

a 6% discount





Special Order Policies & Footnotes:

Special Order Policies

  • Special orders are non-returnable (and non-cancelable if materials have been already ordered or cut before the cancellation request was received).
  • Special order sizes often ship direct from our supplier so will not arrive together with stocked products.

Special Order Minimums

  • Minimum requirements apply because a size may be non-stock or if special setup is required to cut rolls to your desired custom width.
  • Minimum Quantities: If a particular size has a minimum item requirement, please only order that size in multiples of that minimum (e.g. if the minimum is 12, then use multiples like 12, 24, 36, etc).

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Question & Answers

[ viewing questions 1 through 1 of 1 total ]
Kathy H. Oct 02, 2019
QUESTION: Could you use this to wrap a cold water copper pipe to avoid condensation/sweating? Thank you
ANSWER: No, this tape is typically used for electrical applications. For wrapping pipes to prevent condensation we most often sell Shurtape IT-100 at Thank you.

User Reviews

3M 69 Electrical Grade Glass Cloth Tape [Silicone Adhesive]
Made in the USA
hot melt rubber (synthetic)
Offers the widest range of application flexibility available. Exhibits excellent processing performance whether manually or automatically applied. Has superior tensile strength, adhesion properties and holding force which ensures consistent, reliable seals. Hot melt adhesive will bond faster to a surface which is referred to as quick-grab or quick-stick. It typically has higher tack (will feel stickier to the touch), but is also softer. It has lower heat resistance, shear resistance, and sometimes UV resistance than an acrylic adhesive. NOTE: it is called hot melt because the adhesive is applied hot by the manufacturer and then hardens as it cools (you do not need to apply heat to the tape yourself).
natural rubber
Properties are similar to that of hot melt rubber, but natural rubber often holds where other adhesives won't (recycled fibers, dust, cold, heat and heavy loads). It provides good overall adhesion and moisture resistance.
Offer excellent performance, especially for applications in temperatures less than 40°F and greater then 120°F. It provides excellent clarity, has high shear strength, is usually more permanent/durable even when exposed to moisture, and it ages well over extended periods in fluorescent and sunlight. Since it remains clear for the life of the application and does not yellow over time it is ideal for applications such as sealing white cartons. While it has good initial adhesion it does take 24-48 hours to cure and to achieve its maximum bond strength (has gradual adhesion buildup). Another difference between hot melt rubber and acrylic adhesive is if you fold tape over making the two adhesive sides touch the acrylic adhesive will remain attached to the carrier (e.g. paper, film) while a hot melt adhesive will stick to itself and pull off of the carrier. It is the best choice for clarity, UV resistance and aging characteristics.
Is great for extreme temperature applications since silicone adhesive can work in continuous operating temperatures from -100°F to 500°F. They also exhibit good chemical resistance, retain electrical properties, and remove cleanly with little or no residue.
zinc oxide
Zinc oxide based adhesive formula is a skin-friendly adhesive which is commonly used on sports medicine tapes.
Thickness, AKA caliper or gauge, refers to the distance from one surface of a tape backing, or adhesive, to the other.
1 mil = 1/1000 of an inch
Examples: 1/16 inch = 62.5 mils; 1/32 inch = 31.25 mils
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