NIGP 15035: Hardeners, Concrete and Plaster

NIGP 15035 Hardeners, Concrete And Plaster, Item code, covers concrete additives, curing compounds, and related chemical products that state and local governments purchase to strengthen, seal, and finish concrete in construction and maintenance work. Recent solicitations show jurisdictions buying ready-mix concrete delivery services, precast concrete pads and components, concrete repair and overlay work, and Portland cement supplies—often bundled into as-needed or annual requirements contracts that support infrastructure, transportation, and facilities maintenance across multiple departments and locations within a single issuing body.

Activity under this code spans municipal public works departments, county transportation and utilities authorities, transit systems, school districts, and special-purpose districts across the South, Southeast, and Midwest. The City of Houston (TIRZ 17 Memorial City Area Detention Basin, $75 million cast-in-place concrete detention-basin project, RFP due November 5, 2026), City of Santa Cruz Fire Department (concrete pad installation at Fire Station #3, IFB due July 29, 2026 with local business preference), and Kissimmee Utility Authority (precast concrete pads, sleeves, and posts, as-needed annual requirement contract rebid, AR 26-050-JG, bids due August 11, 2026) are recent representative opportunities. Charlotte Area Transit System (CATS) posted two paving and repairs solicitations covering precast concrete pavers at light rail stations and bus stops (June 2, 2026 and September 10, 2026 rebid). Pasco County, City of Plant City, City of Jackson, City of Greenville (Texas), City of Arlington (Texas), and Pinal County also solicited ready-mix concrete, Portland cement, and concrete repair services on recurring as-needed or annual-term bases. Geographic concentration appears heaviest in Florida, Texas, North Carolina, and Oregon, with supplemental activity in California, Michigan, Kentucky, and Wisconsin. Most contracts require prevailing wage compliance, performance and payment bonding, and insurance minimums ranging from $500,000 to $1 million general liability.