3M 2229 Self-Sealing Mastic Ta...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$48.89
3M 2229 Self-Sealing Mastic Tape, 3-3/4" x 10FT

3M 2229 Self-Sealing Mastic Tape, 3-3/4" x 10FT

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Model: 2229

In Stock (leaves warehouse same day if ordered before 3pm ET)

$48.89
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3M 2229 Self-Sealing Mastic Tape, 3-3/4" x 10FT

3M 2229 Mastic Tape is a self-sealing, rubber-based mastic tape engineered for sealing and insulating electrical splices, connections, and mechanical joints in commercial, industrial, and utility environments. Supplied in a 3-3/4" x 10FT roll, this tape provides ample material for wrapping cable connections, conduit joints, and other irregular surfaces that require a continuous, moisture-tight seal. The soft, pliable mastic compound conforms readily to uneven surfaces and fuses to itself as it is applied, forming a weatherproof barrier without the need for heat, solvents, or special tools. Electricians and maintenance crews rely on mastic tape products like the 3M 2229 to protect exposed connections from moisture intrusion, corrosion, and general environmental exposure, helping extend the service life of critical electrical joints.

Key Features

  • Trade Size: 3-3/4" x 10FT roll delivers ample coverage for wrapping splices, joints, and irregular connection points.
  • Self-Sealing Mastic Compound: Soft, pliable mastic fuses to itself layer over layer, forming a continuous, moisture-tight seal.
  • Weatherproof Barrier: Helps protect electrical and mechanical connections from moisture intrusion, corrosion, and environmental exposure.
  • Conforms to Irregular Surfaces: Pliable construction wraps easily around connectors, cable ends, and uneven joints.
  • No Heat or Tools Required: Hand-applied for fast, straightforward field installation.
  • Generous Roll Length: The 10FT roll length supports multiple wraps or larger sealing jobs without frequent tape changes.
  • General-Purpose Versatility: Suitable for a wide range of sealing and insulating tasks beyond standard splice protection.

Technical Specifications

  • Refer to manufacturer documentation for complete technical specifications.

Typical Applications

  • Electrical Splice and Connection Sealing
  • Conduit and Cable Joint Sealing
  • Outdoor and Wet-Location Sealing Applications
  • Corrosion and Moisture Protection Wraps
  • General-Purpose Mastic Sealing Tasks
  • Commercial, Industrial, and Utility Electrical Work

Why 3M?

3M is a trusted manufacturer of electrical tapes and sealing products relied upon by professionals across commercial, industrial, and utility applications. The 2229 Mastic Tape's self-sealing compound and generous 3-3/4" x 10FT roll size make it a practical, reliable choice for creating durable, moisture-resistant seals on splices, joints, and connections in the field. Choosing 3M sealing products helps ensure consistent performance and long-term protection for critical electrical connections.

Product Specs

list_batch:
SPB-20260922
Product Type:
Mastic Tape
Department:
Electrical
Product Subgroup:
Electrical Tape
Product Material:
Mastic
Product Size:
3-3/4" x 10FT
Product Group:
Cable Management & Identification

3M 2229 – Frequently Asked Questions

1) Does 3M 2229 mastic tape need heat, primer, or solvent to seal?
No. The 2229 is a self-sealing rubber-based mastic that fuses to itself layer over layer as you wrap it by hand. No torch, no heat gun, no primer or solvent, no special tools. That is the practical difference from heat-shrink sealing on a live maintenance call.
2) Can I use mastic tape by itself as the outer jacket on an outdoor splice?
Mastic is a sealing and insulating layer, not a wear layer. The 2229 is a soft, pliable compound that conforms to irregular shapes and blocks moisture, so standard field practice is to wrap the splice with mastic first, then overwrap with a vinyl electrical tape to take the abrasion, UV and handling. Used bare, the soft mastic stays tacky and picks up dirt and damage.
3) What is the difference between mastic tape and regular vinyl electrical tape?
Vinyl tape is a thin, stretchy insulating film with pressure-sensitive adhesive; it is good for insulating and color coding but it will not fill voids. The 2229 is a mastic compound, a thick pliable sealant in tape form that flows into the gaps around connectors, cable ends and conduit joints and fuses to itself into one continuous moisture-tight mass. Pick mastic when the job is keeping water out of an irregular connection, and vinyl when the job is insulation or a protective outer wrap.
4) Will 3M 2229 mastic tape seal a connection in a wet or buried location?
Wet-location and outdoor sealing is exactly what the 2229 is sold for. It builds a weatherproof barrier against moisture intrusion and corrosion on splices, cable joints and conduit connections in commercial, industrial and utility work. For direct burial or submerged service, follow the overwrap and build-up practice your spec calls out rather than relying on a single layer.
5) What is the 3M part number for this mastic tape, and what does the 3-3/4 inch size cover?
The manufacturer part number is 2229, supplied in the 3-3/4 inch by 10 foot roll. If your spec or a previous order calls out 3M 2229, that is this product; the width and length are how the 2229 rolls are differentiated, so quote the 3-3/4 x 10FT size when standardizing a stockroom.
6) Can mastic tape be used on non-electrical joints, like sealing a mechanical fitting?
Yes. Beyond electrical splices, the 2229 is used on mechanical joints, conduit seams and other irregular surfaces that need a continuous moisture seal. Because it conforms by hand and needs no heat, maintenance crews use it for general-purpose sealing and corrosion wraps as well as splice protection.
How fast can I get the 3M 2229 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the 3M 2229 come with a warranty?
Absolutely. The 3M 2229 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the 3M 2229?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the 3M 2229 from ZenSupply?
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