Brand Name 3M AC-350 B-Half.pdf

This is a Memorandum for Record (MFR) justifying the limitation of competition at or below the Simplified Acquisition Threshold for a sole-source procurement by the Army Contracting Command at Aberdeen Proving Ground, Tobyhanna Division in Pennsylvania.

The contracting activity seeks to procure 250 cartridges of 3M AC-350 B-1/2 sealing compound, aerospace grade, polysulfide, two-component sealant conforming to SAE AMS-S-8802 Type II, Class B-1/2 and SAE AMS3276 Class B-1/2 specifications. The 2-ounce cartridges must have a working time of 30 minutes, include a dispensing tip, and arrive with a minimum shelf life of seven months from the delivery date of December 11, 2026. The procurement is identified as a new requirement under Fiscal Year 2027 with a firm fixed-price contract type and brand-name specification (3M part number 7160349764). The justification cites brand-name authority based on characteristics best-suited for aerospace applications, high performance, shortest production rates, and compatibility with existing procurement and utilization procedures. The market research documented evaluation of sealants on the Qualified Products Lists for both SAE standards, with testing conducted from 2022 to 2025 confirming that AC-350 provides the fastest cure time and shortest production rates. The certification is dated October 2, 2026, and signed by a Chemical Engineer. The Contracting Officer certification section remains unsigned and incomplete.