Pour it once.
Protect it for good.
Pour it once.
Protect it for good.
3M Scotchcast resin systems deliver permanent splice protection in the harshest underground, submersible, and direct burial environments. Trusted by utilities and contractors for over 40 years, these two-part resins cure into moisture-resistant barriers that withstand thermal cycling, soil pressure, and corrosive conditions in applications up to 46kV. When splice integrity can't be compromised, professionals choose 3M Scotchcast for proven reliability.
Summit Electric Supply stocks a wide selection of 3M Scotchcast resin kits, refill pouches, and composite compounds. Our team can help you match the right product to your splice type, voltage class, and installation environment. Whether you’re managing a field repair or wiring new infrastructure, we’ll help you get the job done right the first time.
Navigate 3M Firestop:
What you can expect from 3M Resin Products.
What you can expect from 3M Resin Products.
- Sealed Splice Protection – 3M resins cure into a solid barrier that resists moisture, expansion, and mechanical stress, keeping splices protected in underground and submersible environments.
- Cross-Voltage Compatibility – Scotchcast formulations are tested for use in applications up to 15 kV, delivering strong dielectric performance in utility and commercial systems.
- Insulation and Encapsulation – Each resin pour creates a complete enclosure around the splice, eliminating the need for multiple layers of tape, wrap, or heat shrink.
- Fast, Repeatable Installs – Pre-measured kits include sealed pouches and matching molds or shells, helping crews finish jobs faster with less mess and fewer variables in the field.
- Flexible or Rigid Options – Choose from flexible molds or rigid shells to match splice geometry, voltage class, and site conditions like movement, moisture, or burial depth.
- Contaminant Resistance – Scotchcast resins are engineered to lock around the cable and seal out water, oil, and corrosive agents that contribute to long-term failure.
- Proven for Underground Use – These resins are trusted in manholes, handholes, vaults, and conduit runs where physical stress, water ingress, and jobsite access can’t be compromised.
Featured 3M Resin Products
Featured 3M Resin Products
Rigid Resin Splice Kits
Protect the splice with a hard shell that locks out water and impact.
Rigid Resin Splice Kits
Protect the splice with a hard shell that locks out water and impact.
Includes: Scotchcast™ 85 Series, 82 Series Inline Kits
- Rated for inline splicing of low- and medium-voltage cables up to 8 kV
- Rigid shells deliver strong mechanical protection and full environmental sealing
- Used in direct burial and vault applications where impact or shifting soil may occur
Flexible Resin Splice Kits
Seal the connection with a flexible, durable resin that conforms to the cable.
Flexible Resin Splice Kits
Seal the connection with a flexible, durable resin that conforms to the cable.
Includes: Scotchcast™ 90 Series, Scotchcast™ 2131 Kit
- Remains pliable after curing to reduce strain on terminations and absorb vibration, rated up to 5 kV for a single conductor and 1 kV for multiple conductor applications.
- Used for motor leads, rejacketing, and pad-mounted equipment where movement is expected
- Ideal for splices requiring strain relief without cracking over time
Scotchcast Electrical Resins
Insulate and encapsulate with resins trusted in power systems worldwide.
Scotchcast Electrical Resins
Insulate and encapsulate with resins trusted in power systems worldwide.
Includes: Scotchcast™ 2131, 40, 4, 9N
- Each formula provides specific cure time, flexibility, or thermal rating depending on job needs
- Offers insulation up to 46 kV with high dielectric strength across all variants
- Available in kit format or standalone containers for production and maintenance crews
Resin Refill Packs & Pouches
Mix, pour, and go with resealable field-ready packaging.
Resin Refill Packs & Pouches
Mix, pour, and go with resealable field-ready packaging.
Includes: Refill Bags for 2131, 40, 4
- Two-part pouches mix inside a sealed bag, reducing cleanup and ensuring consistent volume
- Used for kit refills, system maintenance, or high-volume installations
- Minimizes waste while maintaining quality control on resin quantity and mix ratio