SeaRox® SL 660
Designed for the highest onboard fire safety, ROCKWOOL® SeaRox® SL 660 stone wool boards offer hydrocarbon fire protection in certified marine and offshore H-class applications.
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Industry and product areas
- Marine & Offshore
- Fire protection
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- SeaRox®
About SeaRox® SL 660
You can’t put a price on peace of mind. ROCKWOOL SeaRox SL 660 stone wool insulation boards deliver just this, offering reliable hydrocarbon fire protection in marine and offshore applications. By slowing a fire’s spread, they keep people and equipment safe. Made from natural volcanic rock, SL 660 boards also deliver the thermal and acoustic advantages of stone wool insulation for marine and offshore constructions. The boards are available with reinforced aluminium foil facing on request.
- Resists water absorption to deliver long-term durability
- Tailored for fire-rated constructions
- Uniform appearance – easy to handle and cut-to-size on site
Application
SeaRox SL 660 stone wool insulation is developed for specific certified H-class solutions for hydrocarbon fire protection of bulkheads and decks.
Available dimensions
Facing information
Certificates
Why SeaRox?
SeaRox® marine insulation - Fire safe and thermally efficient
SeaRox® insulation is engineered for the demanding needs of shipbuilding and offshore industries. Its high-quality stone wool provides superior fire protection, excellent acoustic and thermal performance, and long-term durability — all designed to keep people and assets safer at sea.
Tailored solutions — lightweight to standard
Whether you need lightweight or standard solutions, SeaRox® offers tailored products for every application and is delivered to the same exacting standards worldwide. The result: reliable performance that helps create safer, more comfortable onboard and offshore environments.
Product properties
Our products are designed with your specifications in mind:
| Name | Unit | Test standard | Value |
|---|---|---|---|
| Nominal density | kg/m3 | EN 1602 | 150 |
| Water absorption | kg/m² | EN 1609 | ≤ 1 |
| Sound absorption (directly mounted) | ISO 354 | t=2x50 mm αw = 0,90 | |
| Reaction to fire | IMO 2010 FTPC | Non-combustible Low flame-Spread Properties Approved for H-class constructions |
Downloads
Our goal is to help you quickly find the documentation you need. If you’re unable to locate specific information, please reach out - we’re here to support you.

SeaRox SL 660
Download product datasheet

SeaRox® marine and offshore manual
This is a comprehensive technical guide to our SeaRox stone wool insulation.

SeaRox facings brochure
Improve the performance and safety of your SeaRox insulation with specialist pre-applied facings
Online tools
We provide a wide range of free tools to support your work - from online calculators for energy and heat‑loss assessments to a comprehensive online pricing tool Rockprice. Whether you are just starting your project or require technical guidance along the way, we are here to assist you at every stage.
Looking for answers?
If you have technical questions about products or need support for your projects, our technical experts are here to help you.






