How Innovative Resins Is Shaping the Future of Bus Manufacturing with Advanced Composites

India’s bus industry is moving towards lighter, safer, and more efficient vehicles, particularly as electric mobility gains momentum. Behind this transformation is a less visible but increasingly important component: advanced composite materials.

Founded in 2010, Innovative Resins Pvt. Ltd. (IRPL) has grown into a major manufacturer of specialty resins and composite materials, with an installed capacity of more than 54,000 metric tonnes per annum at its Bhiwadi, Rajasthan facility. Headquartered in Gurugram, the company serves transportation, infrastructure, renewable energy, marine, electrical, and industrial applications.

“At IRPL, we firmly believe that we are not merely manufacturing resins, we are enabling our customers to manufacture superior products.”

Ashish Rathi, Managing Director, Innovative Resins Pvt. Ltd.

From Material Supplier to Technology Partner

IRPL’s role in bus manufacturing has evolved beyond supplying raw materials. The company works with bus OEMs, bus body builders, and composite component manufacturers from the design and development stage, helping them meet requirements for lightweighting, fire safety, durability, aesthetics, and production efficiency.

Its composite solutions are used in FRP body panels, roofs, side panels, front and rear fascias, luggage compartments, battery enclosures, dashboards, interior components and structural parts.

The company also provides the wider manufacturing ecosystem required for FRP production, including glass fibre reinforcements, catalysts and accelerators, pigment pastes, gelcoats, mould-release systems, rollers, brushes and other processing consumables.

Building Better Composite Components

At the core of IRPL’s portfolio are its Unsaturated Polyester Resins (UPR), including isophthalic, orthophthalic, terephthalic, DCPD-based and flexible resin systems.

For more demanding applications, the company offers Vinyl Ester and Super Vinyl Ester resins, designed for higher mechanical performance, chemical resistance and durability.

Fire safety is another growing priority. IRPL’s Fire-Retardant Resin Systems, tested and approved by an ICAT-accredited laboratory, are designed to meet stringent fire-safety requirements while maintaining manufacturing efficiency and mechanical performance.

Its COLOURCOAT gelcoats and pre-pigmented gelcoats provide a Class-A surface finish, UV resistance, colour retention, and durability, while eliminating manual colour mixing during production.

The Mould Matters Too

IRPL’s TOOLEX® tooling system focuses on the foundation of composite manufacturing, the mould itself.

The system delivers dimensional accuracy, rigidity, surface finish, and longer mould life, helping manufacturers achieve consistent production quality across repeated manufacturing cycles.

As IRPL puts it, “a great product begins with a great mould.”

Supporting Manufacturers Across India

IRPL operates two manufacturing plants, four regional stock points in Delhi, Mumbai, Kolkata and Bengaluru, and nine sales and technical service offices across India.

This network supports faster material availability and local technical assistance while reducing production disruptions for customers. The company also exports specialty resin solutions to international markets.

Behind the network is a manufacturing and R&D ecosystem built around SCADA automation, quality laboratories, a dedicated R&D centre, and structured technical support.

For bus manufacturers, the objective is ultimately practical: reduce vehicle weight, improve efficiency and battery range, enhance fire safety, achieve better surface quality and extend component durability.

By combining materials, application expertise and R&D, Innovative Resins is positioning composites not simply as an alternative material, but as an important engineering tool for the next generation of buses.