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HDPE Plastic Sheet & Rod

Buy cut-to-size HDPE sheet & rod for marine, food-safe cutting boards, outdoor, and industrial use. Stocked in marine board, cutting board, pipe grade, antimicrobial, woodgrain, and UV/FDA options.

HDPE Sheet
HDPE Sheet
 HDPE Rod
HDPE Rod
 Marine Use
Marine Use
 Cutting Boards
Cutting Boards
 Reprocessed HDPE
Reprocessed HDPE
 Pipe Grade HDPE Sheet
Pipe Grade HDPE Sheet
 LDPE Sheet
LDPE Sheet
 Signage
Signage
 ST Cabinet & Building Material
ST Cabinet & Building Material
 Black HDPE Sheet
Black HDPE Sheet
 Woodgrain HDPE Sheet
Woodgrain HDPE Sheet
 HDPE Radiation Shielding
HDPE Radiation Shielding Material

What is HDPE Plastic?

High-Density Polyethylene (HDPE) is a tough, machinable thermoplastic derived from petroleum. Unlike other forms of polyethylene, HDPE features a tightly packed molecular structure with minimal branching. This composition gives the plastic its signature "high density", resulting in an exceptional strength-to-density ratio, high impact resistance, and high tensile strength.

Because it is significantly lighter than metal and will not rot or splinter like natural wood, HDPE is one of the most widely used industrial and architectural plastics in the world. Depending on specialized additives (such as UV-stabilizers or antimicrobials), it is often sold under premium brand names including King StarBoard®, King Starlite®, ColorCore®, Proteus®, TimberLine®, Playboard®, and Designboard®.

Key Benefits of HDPE:

  • Moisture & Weather Resistant: Near-zero moisture absorption means it thrives in marine environments and outdoor applications without swelling or delaminating.
  • Chemically Resistant: Highly resistant to corrosive acids, bases, alcohols, and harsh commercial cleaning agents.
  • Highly Machinable: Easily cuts, routes, drills, and thermoforms using standard carbide-tipped woodworking tools.
  • Food Safe: FDA, NSF, and USDA compliant grades are available for direct food contact and commercial kitchen use.
  • Low Friction & Durable: Offers excellent sliding abrasion resistance for mechanical wear strips, combined with long-term flexibility.

Types of HDPE Sheet & Material Grades

Because HDPE is easily molded and extruded, it is available in several specialized grades tailored for specific industries:

  • General Purpose HDPE: Excellent for tank linings, thermoforming, and industrial components.
  • Marine Grade (King Starboard®): UV-stabilized to withstand harsh sun, saltwater, and weather. Ideal for boat decks, cabinetry, and outdoor furniture. Includes lightweight variants like Marine Board XL and King Starlite® Utility.
  • Cutting Board Grade: FDA/USDA compliant, textured surface that is knife-friendly. Used in commercial kitchens and food processing.
  • Woodgrain (TimberLine®): Designed to replace natural and composite wood without the maintenance, rotting, or splintering.
  • Antimicrobial (MediGrade): Actively resists mold, mildew, and bacteria growth for medical, clean room, and laboratory environments.
  • Signage (ColorCore®): Multi-layered, engravable colored sheets built for durable, high-visibility outdoor signage.

Common HDPE Applications

With its low friction and high impact strength, HDPE is the material of choice across many sectors:

  • Marine & Boating: Boat seating, decks, hatch covers, walkways, and marine cabinetry.
  • Food & Beverage: Commercial cutting boards, cheese molds, frozen food molds, and food storage bins.
  • Industrial & Manufacturing: Chemical tank linings, wear strips, mechanical parts, and piping systems (geothermal, domestic water, agricultural).
  • Outdoor & Consumer: Playground equipment (Playboard®), outdoor plastic lumber, hard hats, and sporting goods (arena puck boards).
  • Medical & Clean Room: Laboratory cabinetry, sanitary wall panels, and medical storage.

HDPE Material Properties & Specs

Property Typical Value
Density 58.1 - 60.2 lbs/ft.3
Water Absorption 0.03% at 24 hours
Modulus of Elasticity 150k psi (Homo) | 60k - 145k psi (Co)
Specific Heat @ 73°F 2.25 kJ/kg K
Hardness, Shore D 55 - 70
Coefficient of Friction 0.29
Auto-Ignition Temp. 790°F

*Values listed are typical and are meant only as a guide to aid in design. Field testing should be performed to find the actual values for your application.

Frequently Asked Questions About HDPE

What is HDPE plastic?
High-Density Polyethylene (HDPE) is a highly durable, versatile thermoplastic polymer made from petroleum. Known for its outstanding strength-to-density ratio, it is widely used in industrial applications, marine construction, and food processing because of its impact resistance, chemical resistance, and ease of machinability.
What is Marine Grade HDPE (King StarBoard®)?
Marine Grade HDPE, commonly known by brand names such as King StarBoard®, is a UV-stabilized, textured HDPE sheet designed for marine and outdoor environments. It is often used to replace wood for boat cabinetry, hatch covers, seating components, trim, and similar applications because it will not rot, splinter, or delaminate when exposed to moisture and saltwater.
Is HDPE safe for food and cutting boards?
Yes. Specific grades of natural and colored HDPE—such as Cutting Board Grade—are FDA, NSF, and USDA compliant for direct food contact. HDPE is naturally BPA-free, does not harbor harmful bacteria, and easily withstands hot water and commercial cleaning chemicals.
Is HDPE UV resistant? Does it degrade in the sun?
Standard natural HDPE will degrade, fade, and become brittle under prolonged exposure to direct sunlight. However, specialized grades like Marine Board, King StarBoard®, and ColorCore® are manufactured with advanced UV-stabilizers, allowing them to withstand years of harsh outdoor environments without failing.
How do you cut and machine HDPE?
HDPE is extremely easy to machine and can be cut, routed, and drilled using standard woodworking tools (like table saws and CNC routers) equipped with carbide-tipped blades. Note on laser cutting: Laser cutting HDPE is generally not recommended, as the heat causes the edges to melt, warp, and leave a messy finish. Waterjet cutting or traditional routing is preferred.
How do you glue or weld HDPE?
Because HDPE has very low surface energy, it is difficult to bond with standard adhesives. To join HDPE sheets, mechanical fasteners and plastic welding methods such as extrusion welding or hot-air welding with HDPE welding rod are commonly used. Some specialty adhesive systems may also work when paired with proper surface preparation, such as cleaning, abrasion, flame treatment, or a compatible primer.
Can you paint HDPE?
Painting HDPE is difficult because of its low surface energy and non-porous surface. Standard paints typically do not adhere well without surface preparation. If painting is required, the surface may need to be cleaned, mechanically scuffed, flame-treated or otherwise surface-treated, and coated with a compatible plastic adhesion promoter or primer before applying the topcoat.
What is the melting point of HDPE?
The melting point of High-Density Polyethylene typically ranges from 256°F to 275°F (125°C to 135°C), depending on the specific grade. Its maximum continuous operating temperature is generally around 180°F (82°C), making it suitable for thermoforming but not for high-heat mechanical environments.
What is the difference between HDPE and UHMW?
While both are from the polyethylene family, UHMW (Ultra High Molecular Weight Polyethylene) has a much higher molecular weight than HDPE, giving it superior abrasion resistance, impact resistance, and low-friction performance in demanding wear applications. HDPE is generally more rigid, easier to fabricate and weld, easier to thermoform, and more cost-effective for static applications such as tanks, outdoor cabinetry, signage, and marine components.

General-Purpose HDPE Sheet

HDPE Sheet - Natural

High Density Polyethylene is durable and used in many industrial applications.

HDPE Sheet - Natural

Marine-Grade HDPE Sheet

Antimicrobial HDPE Sheet

Woodgrain HDPE Sheet

Engravable HDPE Signage Sheet

Colored HDPE Sheet

HDPE Building & Construction Sheet

HDPE Wear Strips

HDPE Rods

HDPE Rod - Black

HDPE rods offer a combination of high impact strength, low coefficient of friction, & light weight.

HDPE Rod - Black

HDPE Welding Rods

Accessories for HDPE Projects

 

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