UNSPSC 12164802: Water swelling or water stop agent

A chemical product that expands or swells upon contact with water, thereby sealing off water from the materials it is applied to.

UNSPSC 12164802 Water swelling or water stop agent is a Commodity code with minimal recent state and local procurement activity aligned to its nominal scope. The recent opportunities tagged under this code involve water treatment infrastructure rehabilitation—filter replacement, storage tank interior coating and rehabilitation, and masonry waterproofing—but do not center on water-swelling or water-stop agents as discrete product line items. The University of Texas at Arlington's blanket-order RFP for masonry restoration and facilities waterproofing (posted May 26, 2026, due April 30, 2026) contemplates sealants and coatings as line-item categories but does not isolate water-swelling agents. The Long Beach Public Utilities Department's Groundwater Treatment Plant Filter Gallery Valve Rehabilitation Project (RFQ UD26358, due October 8, 2026) includes polyurethane foam grout injection to repair filter-basin concrete cracks but frames the work as a repair method rather than procurement of a water-swelling product. The City of Arlington's Collins elevated storage tank rehabilitation (RFQ 260296PROJECTWUTK24002, due August 20, 2026) and West Basin Municipal Water District's Title 22 Filters project (IFB RFBTH0129, due May 12, 2026) focus on tank and filter component replacement and coatings, not water-stop or swelling-agent procurement. Issuing bodies are municipal water utilities and higher-education facilities departments.

Recent activity is concentrated in California and Texas. The code sees no clear demand signal for water-swelling or water-stop agents as standalone procurement items under this UNSPSC classification. The mismatch between the code's product definition and the actual scope of recent opportunities suggests either inconsistent coding practice in state and local procurement systems or that water-stop and water-swelling agents, when purchased, are typically bundled within broader construction or maintenance contracts rather than solicited as discrete commodity line items. Firms considering this code should validate actual buying patterns through direct market outreach to municipal water districts and public utilities engineering departments rather than relying on the recent-opportunity record.