Prototype rebuild by North Star Communications · review candidate, not the live aquasign.com

Diver inspecting a subsea manifold marked with a bright yellow Aquasign identification marker

Tested · Accredited · Trusted

Subsea signage that stays legible for a lifetime

Aquasign is the only subsea signage proven to prevent marine growth build-up. Non-toxic silicone markers, guaranteed to stay in place and readable for 60 years.

Explore the range Request a sample

60yr

Anti-fouling guarantee

800+

Projects worldwide

30+

Years in oilfield signage

100%

Non-toxic materials

A bright yellow Aquasign silicone marker mounted on subsea equipment

The Aquasign® marker

Identification that survives the sea

Ordinary subsea marking looks fine on installation day. Within a few years, marine growth and degradation can leave it unreadable, right when an inspection or intervention needs it most.

Aquasign markers are moulded from a non-toxic, oil-exuding silicone. A proprietary oil releases slowly from an internal reservoir, so the surface keeps shedding marine growth and stays legible as it ages. That is why we can guarantee it for 60 years.

Anti-foulingNon-toxicUV stableNo maintenanceRetrofit or new-build

One system, every asset

Built for safety-critical environments

From the smallest hose and valve to platform legs and vessel hulls, on the seabed or topside.

Subsea

Aquasign® markers

The guaranteed anti-fouling marker for valves, manifolds, trees, jumpers and structures.

Deepwater

Aquasign Lumino

High-visibility markers engineered for identification at depth and in low light.

Flexible

Cable & tether markers

Flexible markers that wrap and stay put on cables, umbilicals and tethers.

Topside

Oilfield & topside signage

Waterjet, CNC, chemical etch, engraving and screen print, with RFID and codes.

Fixings

Adhesive, mechanical, retrofit

A fixing method matched to your substrate and depth, including diver-fit retrofit.

Evidence

Testing & standards

What the marker is proven against, and which standards apply to your application.

Use cases

Signage for your application

Six applications where anti-fouling identification earns its place. Each links through to the reading that supports it.

Subsea infrastructure

Manifolds, trees, wellheads, jumpers and BOPs.

Offshore wind

Cables, cable protection systems and foundations.

Pipelines & flowlines

Route, crossing and tie-in identification.

ROV & diver

Valve, panel and operability identification.

Production & moorings

Chains, fairleads, buoys and tethers.

Decommissioning & integrity

Re-marking ageing assets in place.

See all use cases →

Learning Centre

Answers before you specify

Everything connects back to one guide. Start with the pillar, then go deep on the question you have.

Start here · the complete guide

Subsea signage & asset identification

Specifying identification that stays legible, compliant and defensible for the life of the asset.

StandardsIs your signage compliant? ComparisonAnti-fouling vs traditional CalculatorMarine growth cost Field guideValve & manifold ID ExplainerWhat Aquasign is made of

Why specifiers choose Aquasign

◉

Proven, not promised

Tested for anti-fouling performance and trusted on over 800 projects in a huge range of climates and depths.

∞

Legible for the life of the asset

The oil-exuding silicone keeps shedding growth, so the marker is as readable on a future dive as on day one.

✓

Defensible on an audit

Clear identification that stands up in an integrity review, with the evidence to back it.

♻

Non-toxic by design

100% non-toxic, with adhesives cleared for air freight and safe handling.

☼

UV and depth stable

Engineered to resist fade and hold up from splash zone to deepwater.

⏱

Fast lead times

Standard five-day lead times, with expedited options when a programme needs them.

Specifying signage for a subsea or topside scope?

Tell us the application and we will send the standards pack and, where it helps, a sample to handle.

Request the standards pack