Sea Shield Marine Products

What Sea Shield Marine Products does

Sea Shield Marine Products, Inc. is a Walnut, California-based private manufacturer of sacrificial anodes for cathodic protection, founded in 1984. The company produces zinc, aluminum, and magnesium anodes across three core lines: general boating anodes (shaft collars, hull anodes, propeller and outdrive anodes, rudder and trim tab anodes, keel cooler anodes, saildrive anodes, and the patent-pending SALCA Line Cutter Assembly), commercial anodes (heat exchanger, hull rods, lobster/crab trap anodes, mooring chain anodes), and industrial anodes (ballast tanks, pier and piling, underground, water screens, plus magnesium anodes). Its products are manufactured via pressure die casting and are produced to military specifications MIL-A-18001 (zinc) and MIL-A-24779 (aluminum), with proprietary design features including the widely adopted Divers Dream Plate, a tear drop anode with multiple bolt-pattern slots, deep-slotted stainless steel screws for installer torque, and galvanized steel inserts that reduce electrical resistive build-up.

The company serves pleasure craft owners, service divers, cathodic protection professionals, commercial fishing operations, and industrial infrastructure buyers. Revenue is generated through unit-priced hardware sales (individual products range from approximately $4.50 for a lobster trap bullet to $121.05 for a large heat exchanger anode), distributed via an authorized dealer network and six third-party marine e-commerce platforms (westmarine.com, anodeshack.com, marinezinc.com, fisheriessupply.com, zincwarehouse.com, yachtzincs.com), as well as direct e-commerce on seashieldmarine.com. The website lists 2026 as the copyright year, indicating active operations, and recent (2022) product launches into Zeus Pod and Volvo Penta saildrive platforms, plus a partnership with UCorr for industrial MSS Anodes, suggest continued product and channel extension. The company does not disclose revenue, has no disclosed funding rounds, and appears to be founder or family-controlled, with headcount stated at 11–50 employees.

Name

Sea Shield Marine Products

Legal name

Sea Shield Marine Products, Inc.

Website

https://seashieldmarine.com

Company type

Private

Founded year

1984

Operating status

Operating

Headcount range

11–50 employees

Short description

Sea Shield Marine Products is a US manufacturer of zinc, aluminum, and magnesium sacrificial anodes for cathodic protection of marine vessels, commercial fishing equipment, and industrial infrastructure, distributed via dealers and marine e-commerce platforms.

Ownership category

akta.pro rank

Product category

Marine Anodes / Cathodic Protection Products

NAICS

Ship and Boat Building (33661)

SIC

Ship & Boat Building & Repairing (3730)

akta.pro primary industry

Marine Coatings, Blasting & Corrosion Control (Hull, Tanks, Cathodic Protection) (TLAHAMAG)

Keywords

• Sacrificial anodes
• Marine cathodic protection
• Zinc anodes
• Boat corrosion prevention
• Marine hardware manufacturing

Headquarters

HQ city

Walnut

HQ country

United States

HQ region

North America

Markets served

GTM type

B2B and B2C

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Operations, Personnel, Technology or R&D, Marketing or Sales

Revenue model

1. Marine Anode Products: Sale of sacrificial anodes (zinc, aluminum, magnesium) for boats, yachts, and marine vessels. Products include shaft collars, hull anodes, propeller anodes, stern/out-drive anodes, rudder anodes, and specialty anodes. One-time purchase products with recurring replacement cycle.
2. Commercial Anode Products: Sale of anodes for commercial maritime operations including lobster/crab traps, mooring chains, heat exchangers, hull anodes, and rods for industrial applications.
3. Industrial Anode Products: Sale of anodes for industrial applications including ballast tanks, pier and piling, underground installations, and water screens for infrastructure protection.

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels4 records

Core offering

Sea Shield Marine Products manufactures and distributes Mil-Spec compliant sacrificial anodes made from zinc, aluminum, and magnesium alloys for cathodic protection of marine vessels, commercial maritime assets (lobster/crab traps, mooring chains, heat exchangers), and industrial infrastructure (ballast tanks, pier and piling, underground pipelines, water screens). The portfolio includes shaft collars, hull, propeller, stern/out-drive, rudder, bow thruster, saildrive, keel cooler, and engine anodes for pleasure craft, plus specialty and industrial configurations, with the patent-pending SALCA Line Cutter Assembly combining anode protection with a disc line cutter.

Product overview

Sea Shield Marine Products offers a comprehensive portfolio of sacrificial anodes for cathodic protection across marine, commercial, and industrial applications. The product lineup spans four main categories: General Boating Anodes (including Streamline Collars, Limited Clearance Collars, SALCA Line Cutter Assemblies, trim tab/rudder anodes, propeller anodes, outdrive anodes for Mercury Mercruiser and Volvo Penta, keel cooler anodes, and engine anodes), Commercial Anodes (heat exchanger anodes, hull rod anodes, lobster/crab trap anodes, and mooring chain anodes), Industrial Anodes (ballast tank, pier and piling, underground, and water screen anodes), and Magnesium Anodes for underground applications. The flagship SALCA (Sacrificial Anode Line Cutter Assembly) uniquely combines zinc or aluminum anodes with integrated stainless steel disc line cutters for dual protection. Products are available in zinc (conforming to MIL-A-18001), aluminum (conforming to MIL-A-24779), and magnesium alloys. Most products are pressure die-cast with proprietary manufacturing processes and feature stainless steel hardware components.

Differentiator

Problem solved

Functional benefit

Brands

• SALCA: Sacrificial Anode Line Cutter Assembly - combines a sacrificial anode with a disc line-cutter for dual protection against corrosion and propeller entanglement.

Products and services

• General Boating Anodes (Shaft, Hull, Propeller, Stern/Out-Drive, Rudder, Bow Thruster, Saildrive, Keel Cooler, Engine) Comprehensive line of Mil-Spec compliant sacrificial anodes (zinc and aluminum) for recreational marine vessels. Products include shaft collars (Streamline, Limited Clearance, Micro Limited Clearance, Beneteau Donut), trim tab and rudder anodes, bolt-on and weld-on hull anodes, stern/out-drive anodes (Mercruiser, Volvo Penta), propeller anodes (Prop Nut, Max Prop, Gori, Flexofold, Beneteau), bow thruster anodes (Side Power), saildrive anodes (Yanmar), keel cooler anodes (Fernstrum, Frigoboat), and engine anodes. Designed by divers for easy underwater installation.
• SALCA Sacrificial Anode Line Cutter Assembly (Zinc and Aluminum) Patent-pending two-part sacrificial anode assembly that fastens around the propeller shaft with no strut gap adjustment required. Available in zinc (MIL-A-18001) and aluminum (MIL-A-24779) versions. Combines cathodic protection with a stainless steel disc line cutter to protect propellers from fishing line, rope, and net entanglement.
• Commercial Anodes (Heat Exchanger, Hull Rod, Lobster/Crab Trap, Mooring Chain) Commercial maritime anode products including extruded zinc and aluminum hull rod anodes (3/8" to 2" diameter, 39" to 72" length), heat exchanger anodes (round 9" ZEP-B-9 and square 6" AEP-A-6 with galvanized pipe inserts), bolt-on lobster and crab trap anodes (Fisherman's Dream with cast-in galvanized steel bonding core), and zinc mooring chain anodes for ASTM A 513 grade FM3 stud link chain.
• Industrial Anodes (Ballast Tank, Pier and Piling, Underground, Water Screens) Heavy-duty cathodic protection anodes for industrial infrastructure including ballast tank anodes, pier and piling anodes (150 lb, 250 lb, and 500 lb models with 3/4" galvanized steel pipe cores), underground anodes (with 1/4" galvanized steel cores and customizable rod extensions), and water screens / storage tanks / grounding electrodes (24 lb to 250 lb). Available through the UCorr industrial partner channel.
• Magnesium Anodes (Underground and Specialty) Magnesium sacrificial anodes for underground and freshwater cathodic protection applications. Product family includes packaged and unpackaged underground anodes with optional copper leads and standard backfill (75% Hydrated Gypsum, 20% Bentonite, 5% Sodium Sulfate), Mag 5 (11" x 4-3/4"), Mag 22 (1/4" x 1-1/2" x 18" steel strap), Mag 2R5, Mag 8, and Mag 15 counterbore-style magnesium anodes.

Quantifiable outcome

• Divers Dream Plate found on most transoms in marinas
• +2 more outcomes

Segments5 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Scale indicators2 records

Recent moves5 records

Expansion highlights5 records

Market position

Strengths5 records

Weaknesses2 records

Competitive moat5 records

Key risks5 records

Key highlights6 records

Customer concentration

• Xx.com/seashieldmarine
• LinkedInlinkedin.com/company/sea-shield-marine

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Sea Shield Marine Products