Elenco dei prodotti per la marca Duralac

Duralac is a specialist jointing compound manufactured by Llewellyn Ryland Limited in the United Kingdom since 1898. Its primary function is to inhibit electrolytic corrosion that occurs when two dissimilar metals are joined together, a problem commonly encountered on boats where stainless steel fasteners meet aluminum masts or hulls. By forming a flexible, non-curing protective seal, it disrupts the electrical path required for galvanic corrosion, effectively isolating the surfaces.

The product is widely respected in marine and industrial sectors. Whether you are installing new hardware, mounting winches, or securing stanchions, Duralac acts as a reliable buffer. The brand offers both the original formulation and a modern 'Green' version, allowing users to select the appropriate compound for their specific application and environmental requirements. Its ability to remain elastic prevents the seal from cracking under the vibration and flex inherent in marine structures.

Because Duralac is not a glue, it facilitates the eventual removal of fasteners, which is a major advantage when performing future maintenance on deck gear. When you choose this compound, you are relying on a chemical solution that has been refined over a century for the specific purpose of protecting metal assemblies from the harsh saltwater environment.

Chemical protection for dissimilar metal joints

Using Duralac ensures that your hardware installations do not turn into long-term maintenance headaches caused by electrochemical degradation between different metals.

• Duralac Jointing Compound: The classic barium chromate-based formula used for high-protection barrier applications.
• Duralac Green: A chromate-free alternative that provides the same anti-corrosive properties while addressing modern environmental needs.
• Elasticity: The synthetic resin base ensures the seal accommodates the thermal expansion and mechanical loads typical of marine hardware.
• Corrosion Inhibition: Acts as a durable barrier preventing the contact that triggers galvanic corrosion.

What is the main use for Duralac?

Duralac is primarily used to prevent electrolytic corrosion when joining dissimilar metals, such as stainless steel screws in aluminum alloys, by creating an insulating barrier.

Is Duralac a permanent adhesive?

No, it is a non-curing jointing compound. It remains flexible, allowing for easier disassembly of hardware components during future service or repair.

What is the difference between original and Green Duralac?

The original formula contains barium chromate for anti-corrosive properties, while the Duralac Green variant provides similar protection without the use of chromates.

Does this compound harden over time?

No, the synthetic resin base is designed to stay elastic, which is critical for maintaining a seal on boat parts that are subject to constant vibration and movement.

Who distributes Duralac in Italy?

Osculati S.r.l. acts as the Italian representative, providing access to these specialized compounds for technical maintenance and boat owners across the country.