Technical Specifications
| Material Type | High Density Polyethylene (HDPE) |
| Surface Finish | Textured / Matte (both sides) |
| Density | ~0.95 g/cm³ |
| Tensile Strength | 26–33 MPa |
| Tensile Modulus | ~0.8–1.2 GPa |
| Flexural Strength | ~25–30 MPa |
| Impact Resistance | Excellent |
| Water Absorption | <0.01% |
| UV Resistance | Excellent (UV-stabilised) |
| Chemical Resistance | Excellent |
| Operating Temperature | -50°C to +80°C |
| Melting Point | ~130°C |
| Recyclability | 100% recyclable |
Certifications & Downloads
Seaboard HDPE (Marine Plastic)
Seaboard® Marine HDPE – Designed for harsh marine environments, Seaboard Marine is a UV-stabilised high-density polyethylene sheet that resists saltwater, moisture, and sun exposure. Perfect for…
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Why choose Seaboard HDPE (Marine Plastic)?
Benefits of Seaboard
Brands & Colours
Applications
Safety Information
Handling & Storage
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- Marine-Grade Durability: Resistant to saltwater, UV rays, and extreme weather conditions, ensuring long-lasting performance.
- Low Maintenance: Does not rot, splinter, or corrode, reducing the need for frequent repairs or replacements.
- Eco-Friendly: Made from recyclable HDPE , making it a sustainable choice for environmentally conscious projects.
- Easy to Fabricate: Can be cut, drilled, and shaped using standard woodworking tools.
- Slip-Resistant: Available in textured finishes for added safety in wet conditions.
- Simona Black & White
- SIGNAL GREY Nuvex Marine-Tec
- ANTI-SLIP / DIAMOND SURFACE
- Marine Structures: Ideal for docks, pilings, seawalls, and boat ramps due to its resistance to water and marine organisms.
- Outdoor Furniture: Perfect for benches, picnic tables, and decking in coastal or high-moisture areas.
- Boardwalks & Walkways: Provides a durable, slip-resistant surface for pedestrian traffic in wet environments.
- Industrial Applications: Used for tank supports, platforms, and other structures exposed to moisture or chemicals.
- Non-Hazardous: Seaboard is not classified as hazardous by OSHA standards. However, fumes may be released if heated, so proper ventilation and protective equipment are recommended during fabrication.
- Fire Resistance: Seaboard has a high flash point (>650°F) and is not easily flammable. In case of fire, use dry chemical, water fog, foam, or CO₂ extinguishers.
- Health Hazards: No known acute or chronic health risks. In case of exposure to molten material, treat as an ordinary burn and consult a physician.
- Store away from flames or heat sources.
- Use mechanical ventilation when cutting or heating to avoid inhalation of fumes.
- Dispose of waste material in accordance with local, state, and federal regulations.
- We will cut any size you need. Request a custom quote!
- Get a quick quote using our Online Pricing Calculator 🧮
Seaboard is a high-density polyethylene (HDPE) material specifically engineered for marine and outdoor environments. Known for its exceptional durability, resistance to water, UV stability, and low maintenance, Seaboard is a superior alternative to traditional wood. It is lightweight, easy to fabricate, and resistant to rot, insects, and corrosion, making it ideal for harsh conditions such as saltwater exposure and extreme weather.
As specialists in plastic, we also offer design and manufacturing solutions. LET'S TALK!
Related Products
Technical Specifications
| Material Type | High Density Polyethylene (HDPE) |
| Surface Finish | Textured / Matte (both sides) |
Certifications & Downloads
Frequently Asked Questions
What is Seaboard HDPE marine sheet used for?
What material is Seaboard marine board made from?
Is Seaboard HDPE suitable for marine and saltwater environments?
What sizes and thicknesses are available for Seaboard HDPE sheets?
Can Seaboard HDPE be cut, drilled, or machined?
How durable is Seaboard HDPE marine board?
Is Seaboard HDPE UV resistant and suitable for outdoor use?
What you can make with Seaboard HDPE (Marine Plastic)

Bearings & Rollers
Turned nylon, acetal, and UHMWPE bearings and guide rollers.

Cutting Boards
Food-grade HDPE boards for commercial kitchens and processing.

Air Conditioner Covers
Custom cut acrylic, polycarbonate and HDPE air conditioner covers. Screen outdoor units, protect from weather and keep airflow clear. Cut to size, shipped Australia-wide.

Chemical Tanks
PVC fabricated tanks for aggressive chemical storage and dosing.

Conveyor Components
Wear-resistant guides, idlers, and return rollers from engineering rod.

Bus & Coach Parts
Machined rod and tube for grab rails, bushings, and transit fittings.

Plastic Tanks
HDPE fabricated tanks for water, chemical, and industrial storage.

Protective Barriers
Ballistic-grade and standard polycarbonate barriers and partitions.
Processing Services
Services available for this product
CNC Routing
Profiling, pocketing, and drilling in HDPE and UHMWPE sheet.
Learn moreCNC Lathe Machining
Turned HDPE and UHMWPE bushings, rollers, and fittings.
Learn morePlastic Welding
Hot-air and extrusion welding for HDPE tanks and fabrications.
Learn moreTank Fabrication
Custom HDPE tanks, bunds, and containment vessels.
Learn moreMachined Parts
Finished HDPE and UHMWPE components to specification.
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