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Panduit ST2229-375P - StrongHold ST2229-375P Insulating Mastic Tape is self-amalgamating and designed for insulating and sealing all types of overhead and direct buried electrical connection up to 600V. With high dielectric strength and superior adhesion to metal and all types of cable insulations and jackets, this mastic tape is ideal for water sealing ductwork, cable ends and all types of splices. Is 3.75 x 3.75 in size and comes in 10 pads per package, and 300 pads per carton.

Panduit ST2229-375P StrongHold ST2229-375P Insulating Mastic Tape is self-amalgamating and designed for…

UPC: 613056793675


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Overview

The Panduit StrongHold ST2229-375P Insulating Mastic Tape (SKU: ST2229-375P) is a 3.2 mm (125 mil) self-amalgamating mastic tape designed for insulating and sealing overhead and direct buried electrical connections rated up to 600V. This tape delivers high dielectric strength (20 kV/mm) and superior adhesion to metals, cable insulations, and jackets without adversely affecting polymeric conducting shields. Its mastic backing ensures a watertight, corrosion-resistant seal ideal for critical applications including water sealing ductwork, cable ends, and all types of splices. Key features include excellent thermal stability (continuous operation at 90°C, emergency overload at 130°C), minimal water absorption (0.10%), and resistance to water, saltwater, soil, and corrosive chemicals. Each pad measures 3.75 x 3.75 inches, providing ample coverage for standard electrical tasks. Packaged with 10 pads per package and 300 pads per carton, the ST2229-375P is optimized for efficient inventory management and immediate deployment. For optimal performance, apply the tape directly to clean, dry surfaces and ensure full overlap during wrapping. After application, the tape fuses into a monolithic insulating barrier, creating a secure, electrically sound seal. For additional mechanical protection, jacket the applied tape with vinyl tape as recommended in Panduit’s installation guidelines. This product is part of the StrongHold ST2226 & ST2229 Series, engineered specifically for high-voltage electrical insulation and moisture sealing in both overhead and direct buried systems.
  • 3.2 mm (125 mil) self-amalgamating mastic tape for 600V electrical connections
  • High dielectric strength: 20 kV/mm; continuous operation at 90°C, emergency overload at 130°C
  • Superior adhesion to metals, cable insulations, and jackets; resists water, saltwater, soil, and corrosive chemicals
  • Each pad: 3.75 x 3.75 in; 10 pads/pkg, 300 pads/carton for bulk storage and deployment

Specifications

Size
3.75 in x 3.75 in
Voltage Rating
600 V
Package Dimensions (L x W x H)
24 IN x 10 IN x 5 IN
Package Weight (Imperial)
0.013 lbs
StrongHold ST2210-400-10BK Vinyl Mastic Tape is a self-fusing mastic compound secured to an all-weather vinyl backing. This product serves as two tapes in one. It can be used for insulating and for the water sealing of electrical connections up to 600V. For indoor and outdoor usage, UV protection, super adhesion and moisture and chemical resistance. Is 4 x 10 in size and comes in 1 roll per package, and 10 rolls per case.

ST2210-400-10BK

StrongHold ST2210-400-10BK Vinyl Mastic Tape is a self-fusing mastic compound secured to an all-weather vinyl backing. This product serves as two tapes in one. It can be used for insulating and for the water sealing of electrical connections up to 600V. For indoor and outdoor usage, UV protection, super adhesion and moisture and chemical resistance. Is 4 x 10 in size and comes in 1 roll per package, and 10 rolls per case.
StrongHold ST2228-200-10BK Rubber Mastic Tape is a self-bonding mastic with an ethylene propylene rubber (ERP) backing, secured to an electrical grade mastic. It can be used for insulating and for the water sealing of splices and terminations up to 2kV. For indoor and outdoor usage, UV resistant, super adhesion and moisture, corrosion, and chemical resistance. Is 2 x 10 in size and comes in 1 roll per package, and 30 rolls per case.

ST2228-200-10BK

StrongHold ST2228-200-10BK Rubber Mastic Tape is a self-bonding mastic with an ethylene propylene rubber (ERP) backing, secured to an electrical grade mastic. It can be used for insulating and for the water sealing of splices and terminations up to 2kV. For indoor and outdoor usage, UV resistant, super adhesion and moisture, corrosion, and chemical resistance. Is 2 x 10 in size and comes in 1 roll per package, and 30 rolls per case.
StrongHold ST1755-075-60BK Friction Tape is a mechanical tape for abrasion and cut-through protection and mechanical protection for rubber electrical tape. Both sides of the tape are coated with a high-quality cotton fabric and have a black rubber adhesive compound. Is x 60 in size and comes in 1 roll per package, and 100 rolls per case.

ST1755-075-60BK

StrongHold ST1755-075-60BK Friction Tape is a mechanical tape for abrasion and cut-through protection and mechanical protection for rubber electrical tape. Both sides of the tape are coated with a high-quality cotton fabric and have a black rubber adhesive compound. Is x 60 in size and comes in 1 roll per package, and 100 rolls per case.
StrongHold ST130-150-30BK Rubber Insulating Tape is designed for high voltage jobs with a 130 C emergency overload temperature. It is linerless which allows for quick and easy application and is self-bonding. This tape produces a void-free build-up and has great chemical resistance. The base is made of an Ethylene Propylene Rubber and is 1.5 x 30 in size. Comes 1 roll to a box, and 30 rolls per case.

ST130-100-30BK

StrongHold ST130-150-30BK Rubber Insulating Tape is designed for high voltage jobs with a 130 C emergency overload temperature. It is linerless which allows for quick and easy application and is self-bonding. This tape produces a void-free build-up and has great chemical resistance. The base is made of an Ethylene Propylene Rubber and is 1.5 x 30 in size. Comes 1 roll to a box, and 30 rolls per case.
StrongHold ST130-150-30BK Rubber Insulating Tape is designed for high voltage jobs with a 130 C emergency overload temperature. It is linerless which allows for quick and easy application and is self-bonding. This tape produces a void-free build-up and has great chemical resistance. The base is made of an Ethylene Propylene Rubber and is 1.5 x 30 in size. Comes 1 roll to a box, and 30 rolls per case.

ST130-150-30BK

StrongHold ST130-150-30BK Rubber Insulating Tape is designed for high voltage jobs with a 130 C emergency overload temperature. It is linerless which allows for quick and easy application and is self-bonding. This tape produces a void-free build-up and has great chemical resistance. The base is made of an Ethylene Propylene Rubber and is 1.5 x 30 in size. Comes 1 roll to a box, and 30 rolls per case.
StrongHold ST2242-150-15BK Rubber Splice Tape easily conforms to irregular shapes and surfaces providing an electrically stable build-up. It is self-amalgamating and good for low voltage insulation of no more than 600V. Is 1.5 x 15 in size and comes in 1 roll per package, and 70 rolls per case.

ST2242-150-15BK

StrongHold ST2242-150-15BK Rubber Splice Tape easily conforms to irregular shapes and surfaces providing an electrically stable build-up. It is self-amalgamating and good for low voltage insulation of no more than 600V. Is 1.5 x 15 in size and comes in 1 roll per package, and 70 rolls per case.
StrongHold ST23-075-30BK High Voltage Tape is made of ethylene propylene rubber (ERP) and is self -amalgamting. Designed for high voltage insulating and jacketing splices through 69kV. For indoor and outdoor usage, UV resistant and excellent moisture, corrosion, and chemical resistance. Is x 10 in size and comes in 1 roll per box, and 60 rolls per case

ST23-075-30BK

StrongHold ST23-075-30BK High Voltage Tape is made of ethylene propylene rubber (ERP) and is self -amalgamting. Designed for high voltage insulating and jacketing splices through 69kV. For indoor and outdoor usage, UV resistant and excellent moisture, corrosion, and chemical resistance. Is x 10 in size and comes in 1 roll per box, and 60 rolls per case
StrongHold ST130-075-30BK Rubber Insulating Tape is designed for high voltage jobs with a 130 C emergency overload temperature. It is linerless which allows for quick and easy application and is self-bonding. This tape produces a void-free build-up and has great chemical resistance. The base is made of an Ethylene Propylene Rubber and is x 30 in size. Comes 1 roll to a box, and 60 rolls per case.

ST130-075-30BK

StrongHold ST130-075-30BK Rubber Insulating Tape is designed for high voltage jobs with a 130 C emergency overload temperature. It is linerless which allows for quick and easy application and is self-bonding. This tape produces a void-free build-up and has great chemical resistance. The base is made of an Ethylene Propylene Rubber and is x 30 in size. Comes 1 roll to a box, and 60 rolls per case.

Frequently Asked Questions

What is the primary application of ST2226 & ST2229 tape?

This self-amalgamating insulating mastic tape is used for insulating and sealing overhead and direct buried electrical connections up to 600 volts. It is also suitable for water sealing ductwork, cable ends, and splices.

What is the maximum voltage rating for this tape?

The ST2226 & ST2229 Series Insulating Mastic Tape is designed for electrical connections up to 600 volts.

What is the thickness of the ST2226 & ST2229 tape?

The tape has a thickness of 3.2 mm (125 mil), as measured by ASTM D 4325.

What materials does the insulating mastic tape adhere to?

The tape has superior adhesion to metals, all types of cable insulations, and jackets. It does not adversely affect polymeric conducting shields.

What are the continuous and emergency operating temperatures?

The continuous operating temperature is 90°C, and the emergency overload temperature is 130°C. Both are tested by ASTM D 4325.

Is additional jacketing required for ST2226 & ST2229 tape?

Yes, both the ST2226 and ST2229 series tapes should be jacketed with vinyl tape.

What is the dielectric strength of the insulating mastic tape?

The dielectric strength is 20 kV/mm, or 500V/mil when tested on a 0.51 mm (0.20 in) specimen, according to ASTM D 149.

Is the ST2226 & ST2229 tape RoHS compliant and lead-free?

Yes, the product is RoHS Compliant and Lead Free.

What forms are available for the ST2226 and ST2229 series?

The ST2229 series is available in pad form, and the ST2226 series is available in roll form.

What are the recommended storage conditions for the tape?

The product should be stored in its original packaging, horizontally, under cover, at a temperature between 5°C and 35°C.

Frequently Asked Questions about Panduit

What environmental ratings do Panduit products have?

Panduit products feature comprehensive environmental ratings across multiple standards, including UL 508A Type 1, 2, 3, 4, 4X, 12, and 13; CSA Type 1, 2, 3, 4, 4X, 12, and 13; and NEMA Type 1, 2, 3, 4, 4X, 12, and 13. They meet IEC 60529 IP66 rating, providing robust protection against dust, water, and corrosion in both indoor and outdoor environments, with operating temperatures ranging from -40°C to 130°C.

What certifications and standards do Panduit products comply with?

Panduit products are certified to multiple critical industry standards, including UL (Underwriters Laboratories) in the USA and Canada, CSA (Canadian Standard Association), EN IEC 61386, LVD 2006/G5/EC, and ARRA standards. Our products meet rigorous certifications for electrical safety, environmental compliance (WEEE and RoHS), and are designed to perform in extreme temperatures ranging from -55°C to 105°C, making them suitable for demanding industrial environments.

What industries and applications are Panduit products used for?

Panduit products are engineered for critical applications across multiple industries, including commercial construction, food and beverage, oil and gas, renewable energy, transportation, and safety-critical environments. Their solutions span electrical infrastructure, wire management, cable ties, power connectors, and safety systems designed to withstand extreme conditions like high vibration, temperature variations, UV exposure, and corrosive agents. Key industries include solar and wind energy, aerospace, heavy trucking, military, commercial transportation, and industrial manufacturing.

What are the main product lines offered by Panduit?

Panduit offers a comprehensive range of electrical infrastructure products including power connectors, cable ties, grounding connectors, identification products, safety solutions, terminals, cable cleats, wiring duct, and cable tie accessories. These products are engineered for industrial environments across multiple sectors like commercial construction, food and beverage, oil and gas, renewable energy, transportation, and safety applications.

What are the key features of Panduit products?

Panduit products are engineered for robust performance in heavy-duty industrial environments, featuring a comprehensive range of solutions including cable ties, power connectors, terminals, and identification products. Key features include proven quality performance, subject matter expertise, and customer-driven innovation across multiple industrial sectors such as commercial construction, food and beverage, oil and gas, renewable energy, transportation, and safety applications. The product line is designed to maximize productivity, reliability, and safety while meeting stringent industry standards.

What is Panduit's warranty policy?

Panduit provides a comprehensive Limited Product Warranty that can be fully reviewed on their official website at www.panduit.com/warranty. All Panduit products are subject to the terms, conditions, and limitations of this current warranty. Customers are advised to review the specific warranty details for their particular product, as Panduit requires buyers to determine product suitability for their intended use and assumes all associated risks.

What technical support does Panduit offer?

Panduit offers comprehensive technical support through their dedicated customer service team, accessible via phone at 1-800-777-3300. They provide expert assistance for their full range of industrial infrastructure products, including cable ties, power connectors, terminals, and identification solutions. Customers can also access additional technical resources and product information through their website at www.panduit.com.

What accessories are available for Panduit products?

Panduit offers a wide range of accessories across multiple product lines, including cable ties, cable tie accessories, cable tie tools, identification products, cable cleats, grounding connectors, and VeriSafe accessories like the VeriSafe Network Module and Insulation Piercing Connectors. For a comprehensive view of all available accessories, customers are recommended to visit www.panduit.com for the full product catalog.

How are Panduit products typically installed?

Panduit products are engineered for comprehensive installation across industrial environments, utilizing specialized tools and techniques for precise mounting. Installation methods vary by product line - from cable ties and power connectors to terminals and identification solutions - but all are designed for robust performance in heavy-duty settings. Technicians typically use Panduit's dedicated installation tools and follow manufacturer guidelines available at www.panduit.com to ensure proper fitting and maximum infrastructure reliability.