The word Metalock stands for a highly successful technology intended for the repair of cracked or broken cast iron or cast steel. This cold process originated in the oil fields of Texas in the 1930’s; it was developed to eliminate the dangers of open flame welding in inflammable conditions.

The process had many ancillary advantages, such as the absence of heat meaning the elimination of distortion, reduction in post repair machining and pressure tightness.

Metalock (Britain) Ltd was created in 1947 and its great success led to the creation of the Metalock International Association in 1953. The original members were the companies from UK, France, Sweden and Norway. These partners funded associated companies throughout the world. Most, not all, used the Metalock name. Today these and further independent companies are members of the Metalock International Association.

Metalock activities in Brazil started in São Paulo, in June of 1957, with the name Unilock. The basic activity then was performing repairs to cold cast iron components, mainly for industrial and marine equipment, such as diesel engines. At that time, most industrial machinery was made in cast iron and the repair market expanded because there was a shortage of spare parts, as a consequence of the war. During those initial years, there was considerable demand for marine equipment repairs in Brazil. When steel substituted cast iron in equipment, Unilock, who was by then well established in the industrial market, diversified its activities. In January of 1961, it took over Oficina Duncan, a marine engineering service company in Santos, and after this acquisition the new company adopted the name Metalock Brasil Ltda., adding marine engineering services market to its activities.

The company expanded considerably its engineering services in the industrial, marine and offshore markets in Brazil, building itself a reputation for reliable services conducted in-house – cold stitching (Metalock®), mechanical, machining, in-situ machining, welding, plate work, boiler work, electrical, electronics, pneumatics, hydraulics, propulsion, refrigeration, electroplating, safety inspections.

Metalock Brasil are official service representatives for many manufacturers of marine equipment and its technicians regularly attend training courses at these manufacturers abroad, keeping abreast of technological developments and methods. In addition it has close working arrangements with other marine equipment manufacturers. Its repair teams are accustomed to working abroad, on board vessels during voyages and are readily deployed to anywhere in the world.

Metalock Brasil is ISO 9001:2015 certified by DNV-GL.


Metalock Brasil offers unique repair solutions and marine and industrial equipment maintenance in the minimum time scenario.

Metalock Brasil offers engineering solutions attending client requirements complying to service associated statutory requirements through personnel qualification, strategic alliances with original equipment manufacturers and in association with companies of equivalent international profile.


Maintain the Metalock name as a national and international reference for marine and industrial repair and maintenance services. Increase company performance in offshore and industrial markets. And expand specialized technical repair service range.


・ Credibility and trust.
・ Quality and integrity.
・ Care for our clients and employees.
・ Obligation towards team-work.

Quality Management System

After a management decision taken during the 90s, Metalock Brasil maintains an ISO 9001 Certified Quality Management System as from 2000. This system is relevant for Mechanical, Electrical and Electronic Maintenance Services to the marine, offshore and industrial markets. The system is audited regularly by DNV-GL.


Metalock® Brasil supports:

Fundação Abrinq | Instituto Ayrton Senna | Casa Esperança de Santos | ABRALE
ABRASTA | Exercito da Salvação | IBAMA – MMA | Retalhar


MIA – Metalock International Association – Working together, improving and expanding.

MIA – Metalock International Association – Working together, improving and expanding. MIA was formed in 1953. One of its key foundations is to develop technical know-how, research and Metalock materials for the execution of repairs using the cold stitching Metalock® Technique. MIA provides its own materials, tooling and expertise exclusively to its members. Conferences are hold once a year in various parts of the world enabling members to update techniques and extend the services they offer. The association has now grown into a unique organization operating in over 70 countries.

The name Metalock Brasil is now synonymous with rapid response and high quality repair – often in challenging environments.

Metalock Brasil is associated to ISES (International Ship Engineering Service Association), which qualifies the electrical services provided by its members around the world.