Coastal Seal Services, LLC

Coastal Seal Services, LLC, a veteran-owned small business based in Lincolnton, North Carolina, performs shaft seal repair, maintenance, and installation services for naval and maritime vessels as a prime contractor, with a customer base concentrated in the U.S. Navy and U.S. Coast Guard. The vendor operates entirely as a prime (100% of recent awards) and competes predominantly under Total Small Business set-asides on Coast Guard purchase orders, with occasional full-and-open awards for Naval Sea Systems Command work.

Coastal Seal Services' customer concentration is sharply anchored by the Department of the Navy Military Sealift Command, which accounts for 23 awards carrying $74.3 million in combined potential value — roughly 96% of the vendor's total potential value. The remaining customer base splits between Naval Sea Systems Command (52 awards, $1.6 million) and the Department of Homeland Security U.S. Coast Guard (92 awards, $1.5 million), with a single $13 thousand award from the National Oceanic and Atmospheric Administration and one award from the Army Corps of Engineers. The tension between award count and dollar value is stark: the Coast Guard dominates by volume (92 awards), but those are small purchase orders averaging roughly $16 thousand each, while Military Sealift Command's 23 awards carry an average value exceeding $3.2 million per award.

The vendor holds a substantial multiple-award indefinite delivery contract with Military Sealift Command (N102C/N7 D. Willis Wartsila MAC) valued at $73.5 million for engineering, technical maintenance, and repair services on Wartsila brand equipment aboard MSC vessels, running through August 2026. Work under this vehicle covers stern tube seals, shaft seals, propulsion systems, and diesel engines on naval sealift ships, with services performed worldwide (CONUS, OCONUS, and hostile areas) under administrative oversight from the Navy. Recent Coast Guard purchase orders exemplify the vendor's capability: a $28.6 thousand total small business set-aside for shaft seal service and maintenance on USCGC Pablo Valent (awarded December 2025), a $39.2 thousand award for shaft seal assembly overhaul and waterborne alignment testing on USCGC Legare (May 2025), a $38.5 thousand award for MX9 shaft seal repair, vulcanization, and alignment on CGC Maple (November 2025), and smaller orders for seal installation on USCGC Ex-Brant ($6.3 thousand, June 2026) and USCGC Bluefin ($5.8 thousand, March 2026). A $32.7 thousand Naval Sea Systems Command award for supply of a new shaft inflatable seal (July 2024) and an $85.2 thousand NAVSEA order for stern tube shaft seal services (June 2023) show full-and-open capacity alongside set-aside work.

The vendor's NAICS footprint centers on Ship Building and Repairing (91 awards), Commercial and Industrial Machinery and Equipment Repair and Maintenance (29 awards), and Gasket, Packing, and Sealing Device Manufacturing (12 awards), with PSC concentration in Maint/Repair/Rebuild of Ship and Marine Equipment (47 awards), Miscellaneous Ship and Marine Equipment (33 awards), and Technical Representative services for Ship and Marine Equipment (29 awards). Activity has remained low and flat over the past five years (two awards in 2022, three in 2023, five in 2024, five in 2025, two in 2026 year-to-date), with $3.9 million obligated against $77.4 million in combined potential value — reflecting the long-tail execution profile of the Military Sealift Command IDV and the small, short-duration purchase-order volume from the Coast Guard. The MSC IDV contract reaches ultimate completion on August 4, 2026, creating immediate recompete exposure for the vendor's largest revenue source.