Rotational Molding

Powders That Shape the Future of Rotomolding

From tanks to furniture, we deliver resins that mold with precision, strength, and style.

Rotational Molding Powders Built for Performance, Flexibility, and Scale

Rotational molding - also known as rotomolding or rotational casting - is one of the fastest-growing methods for manufacturing hollow plastic products. And it's easy to see why. With the ability to create open or closed shapes in virtually any size or form, rotomolding is both flexible and cost-effective.

Thanks to ongoing innovation and materials like Microthene polyolefin powders, the process has evolved dramatically. Today, rotomolding can match or even outperform traditional methods like blow molding, injection molding, and thermoforming—especially when it comes to producing large, complex, or seamless parts that other processes can’t easily replicate.

What Sets Rotomolding Apart?

Unlike other plastic molding processes that use pellets and high-pressure injection, rotomolding uses powder resin. The mold is gently heated and rotated on two axes, allowing the rotational molding powder to melt and form a consistent layer across the mold’s surface. As it cools, the material solidifies into a stress-free, hollow part—ready for use with minimal waste.

Key Benefits Include:

Resin powders instead of pellets
No external pressure - powder melts directly in the mold
Lower-cost tooling and equipment
Uniform wall thickness, controlled by the amount of powder used
Virtually no scrap or production waste

This approach not only simplifies manufacturing but also offers superior control over part strength, surface finish, and wall consistency.

Rotomolding Materials from Specialty Powders

At Specialty Powders, we supply a full range of HDPE and LLDPE materials - including Petrothene, Lupolen, and Microthene powders—developed for the most demanding rotomolding applications. From general-purpose to advanced specialty grades, our products are ready to perform across industries.

Performance-Driven Rotomolding Materials for All Industries

No two projects are the same - and that’s why we don’t believe in one-size-fits-all powders. Whether you need a go-to resin like Icorene for outdoor use, cleaner mold releases with our hexene grades, or the toughness and finish of metallocene, we’ve got options. Need flexibility or something custom? We’ll help you get the right blend for the job.

General Purpose Rotomolding Powders

Our Icorene resins are UV and heat stabilized, designed for long-lasting outdoor and industrial use. Available in natural, black, and custom colors, and supplied in bags, bulk, or big bags for operational flexibility.

Hexene High Performance Powders

Designed with a premium UV and antioxidant (AO) stabilization package and a built-in internal release agent, these powders minimize the need for external mold sprays and boost efficiency.

Metallocene Hexene (mPE) Powders

These high-performing materials deliver superior toughness, excellent gloss, and a broader processing window. Offered in natural, black, and custom-colored options, with Specialty Powders as a trusted supplier.

Flexible Rotomolding Grades

For applications that require flexibility over rigidity, these PE grades are ideal. Fully stabilized, they are built to flex under stress and maintain dimensional accuracy due to their low shrinkage properties.

Rigid Rotomolding Powders

Built for durability, these toughened HDPE grades offer high stiffness, hardness, and temperature resistance—ideal for rigid rotomolded parts. Fully UV- and heat-stabilized, with Specialty Powders Superlinear recognized as a trusted name in the industry.

Flame Retardant (FR) Powders

Our PE-based FR powders are tested to meet key safety standards like UL. Performance can differ depending on color and wall thickness, so we recommend reaching out to your local Specialty Powders representative for guidance.

Additives for Rotomolding

Looking to boost product performance? Our expert team can tailor additive systems—often incorporated alongside color—to enhance your part’s functionality without complicating processing.

Polypropylene (PP) Powders

PP powders offer a simple, reliable option for rotomolding. Parts made with PP are more rigid than LLDPE or HDPE, though not as impact-tough in colder temps. All grades are UV and heat stabilized.

Special Effect Powders

Add some flair. These color-rich powders—usually based on Icorene® 3560 or 3590—bring unique visual appeal to rotomolded parts, without sacrificing UV or heat stability.

“Designer” Rotomolding Powders

For products where appearance matters, our high-quality PE powders deliver standout aesthetics and clean finishes. Ideal for lighting, furniture, and other applications needing a smooth surface and excellent weatherability.

Specialty Rotomolding Powders

For unique or technical applications, we offer custom powders including:

Electrically conductive PE
Cross-linkable PE
Polyamide, Polycarbonate, TPE, Elastomers, PVDF
Rotolining materials

Need something tailored? Our team can help you formulate the right material for your specific performance needs.

Application-Focused Solutions

Rotomolding Powders for Tanks

From 500L containers to massive 40,000L tanks, our materials offer excellent UV protection, durability, and processing stability. Lower MFI grades are ideal for thicker walls and longer heat cycles, reducing dripping and stress cracking.

Automotive-Grade Icorene Powders

Used in trucks, buses, tractors, and off-road vehicles, Icorene grades such as 1440, 1460, 1505, 1613, and 1761 meet ECE R34 Annex 5 fuel tank regulations. These grades are trusted by leading test houses including TÜV.

Let’s Build Something Better Together

Whatever your application—tanks, technical parts, or custom shapes—we have the right powder and expertise to support your project. Contact us today to explore our rotomolding solutions.