3M 7000121253 Epoxy Potting Compound 270 Black 1 Gal Kit

Product Description

The 3M 7000121253 is a rigid, two-part epoxy potting compound designed for protecting and bonding electronic and electrical components. Supplied as a 1-gallon kit containing equal volumes of Part B and Part A, it mixes at a 1:1 ratio and delivers a 70-minute work life, allowing ample time for careful dispensing into enclosures or around sensitive assemblies. Handling strength is reached in approximately 3 hours. The low viscosity formula flows easily into voids and tight geometries without requiring specialized mixing equipment. It is non-corrosive to copper and non-exotherming, making it well suited for heat-sensitive electronic assemblies where thermal runaway during cure is a concern.

This compound is used in potting and bonding applications across residential and commercial electrical, HVAC control board manufacturing, and general electronics assembly. Its high-flow characteristics make it effective for filling enclosures around transformers, sensors, PCBs, and terminal blocks. Electricians, electronics technicians, and OEM production operators are the primary installers. The black color provides a finished appearance and basic UV opacity when components are potted in open enclosures.

Key Features

• Two-part rigid epoxy with a 1:1 mix ratio for straightforward dispensing
• 70-minute work life provides extended open time for complex potting setups
• Handling strength achieved in approximately 3 hours after mixing
• Low viscosity and high flow for thorough void fill around electronic components
• Non-corrosive to copper, safe for use directly against wiring and terminals
• Non-exotherming cure reduces thermal stress on heat-sensitive assemblies

Compatibility

Designed for potting and bonding electronic and electrical components where a rigid, low-viscosity two-part epoxy compound is required.

Installation Notes

This compound is typically applied by electricians, electronics technicians, or OEM assembly personnel. De-energize all circuits and discharge any capacitors before potting live assemblies. Measure and mix Part A and Part B in the correct 1:1 ratio by volume to ensure full cure; incomplete mixing is the most common cause of adhesion failure. Work within the 70-minute pot life and allow adequate cure time before returning the assembly to service.

Technical Specifications

• Mix Ratio: 1:1 (Part A to Part B)
• Work Life: 70 minutes
• Handling Strength: Approximately 3 hours
• Color: Black
• Kit Size: 1 gallon (Part A) plus 1 gallon (Part B)
• Unit of Measure: Kit
• Weight: 20.64 pounds
• UPC: 00021200822636

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7000121253