Your Reinforcement Fiberglass Supplier in the US
Johns Manville provides a wide range of fiberglass reinforcement solutions to improve the performance of thermoplastic and thermoset composites.
MultiStar® Multi-End Roving, available now also in North America, is crafted to enhance fiberglass distribution, wetting, and bonding and significantly reduce fuzz. This roving is optimized explicitly for various applications, including SMC Class A composite materials, the production of long-fiber reinforced PU panels, thermoset weaving applications, LFI (PU) headliner production, GMT, and spray-up processes.
StarRov® Single-End Roving is well-suited for various fabric processes, including LFT or D-LFT processes, UD tapes, pultrusion, weaving, and filament winding. It offers a range of benefits, such as exceptional mechanical properties, low VOC, excellent bundle opening, rapid impregnation, perfect wet-out, high dry strength, and minimal fuzz for an enhanced experience.
ThermoFlow® Chopped Strand is precisely engineered to excel in various applications and processes, notably in thermoplastic reinforcement. JM chopped strand is known for its excellent strand integrity, clean feeding, and consistent fiber distribution.


MultiStar® 272 is an assembled roving manufactured with continuous glass fibers of defined diameter into a cylindrical roving package compatible with unsaturated polyester. It offers best in class performances in terms of surface aspect (Top Class A) with outstanding strength performances, enabling SMC compounders and moulders to further compete effectively with other materials.
Looking for more information about our products and services? Our team of experts is ready to help you find the right solution for your applications. Click the yellow button below to schedule a call.

"I've been in the fiberglass industry for 27 years and my expertise is in thermoplastic chopped strands. My aim is to understand each customer's long term goals so that we can develop a unique approach to meet your individual needs."
Jillian Gill, Key Account Manager

"I look forward to getting in touch with you and finding the right solution for your needs. My focus is on wet chopped fiberglass for gypsum boards as well as thermoplastics."
Mike Walsh, Key Account Manager


JM 2023 Sustainability Report
"By innovating and implementing solutions with integrity and accountability, we are confident that JM and our customers will be successful and that we will fulfill our vision of Building a Better Tomorrow.”
Scott Coons | VP R&D, Chief Sustainability Officer
JM's 2023 Sustainability Report highlights our commitment to sustainability and corporate social responsibility. It reflects our dedication to stakeholders and the environment, and shows progress towards our sustainability goals. This report, covering 2021-2023, is the first to include both GRI and SASB standards, providing greater insight into our sustainability efforts.


-
WEBINARReinforcement Fiberglass FundamentalsLearn about the fundamentals of fiberglass, such as the role of the sizing, winding and unwinding options, the various glass types, and the use of fiberglass in different composite production processes.
-
RELATED PRODUCTSAssembled Roving for Thermoset CompositesDiscover our assembled roving solutions for thermoset composites.
-
VIDEOEnabling a Sustainable FutureWe are manufacturing fiberglass that enables other products to perform in their markets. It allows for sustainable living in construction materials, sustainable mobility in transportation parts and provides extra performance in tough sports equipment.
-
#JMextraMileRead the JMextraMile BlogLearn more about what it means to us going the #JMextraMile.
-
VIDEOJohns Manville's Engineered ProductsJohns Manville Engineered Products manufactures fiberglass in Europe and North America and offers chopped strand and roving to a variety of applications to extend the capabilities of thermoplastics and thermosets, and to reinforce gypsum boards.