Polyester Nonwoven, Fiberglass Mat, Glass Microfiber and Glass Sliver for Lead-Acid Batteries

As the demand for reliable energy storage grows, lead-acid batteries continue to prove their value across a wide range of applications - from automotive and industrial vehicles to backup power systems and renewable energy storage.

At Johns Manville, we offer Evalith® Polyester Nonwoven, Evalith® Fiberglass Mat, Evalith® Glass Microfibers, and Evalith® Glass Sliver. Our advanced materials are engineered to meet the specific needs of each battery type:

• SLI (Starting, Lighting, Ignition): Evalith® Fiberglass Mat provides mechanical stability and reduces paste movement for longer battery life.
• EFB (Enhanced Flooded Battery): Evalith® Fiberglass Mat supports charge acceptance and cycle durability.
• AGM (Absorbent Glass Mat): Evalith® Glass Microfibers ensures optimal electrolyte retention and conductivity.
• Deep Cycle: Evalith® Fiberglass Mat, Evalith® Polyester Nonwoven and Evalith® Glass Sliver enhance plate support and enable high cycle endurance.

Thomas Miowsky
Portfolio Manager

"With technical service teams in both the U.S. and Europe, and a strong domestic supply chain, we support our customers with fast response times, local expertise, and customized solutions that meet their exact production needs."

What is a polyester nonwoven, a fiberglass mat, glass microfiber or a glass sliver?

Polyester nonwoven consists of randomly orientated filaments, thermally or chemically bonded. Fiberglass mat is made of fiberglass with defined diameter and length. The fibers are oriented in a random pattern and bonded with an acid-resistant binder. Glass sliver is a continuous strand of loose untwisted C-glass fibers with a defined diameter and random length. Glass microfibers are extremely fine glass filaments that form a porous, absorbent structure - ideal for retaining electrolytes and supporting ionic conductivity in AGM batteries.

These materials are specifically engineered to meet the demanding requirements of battery applications, including acid resistance, electrical conductivity, mechanical durability, and processability.

Jörg Meier
Product Development Leader

"Did you know that a single layer of our glass fiber pasting paper can reduce paste bleed-through and extend plate life? This results in cleaner processing equipment, improved process control, and longer-lasting battery plates."

ISO Certificates

Safe Use Instructions

Scott Coons
Chief Sustainability Officer

"By reducing waste, improving process efficiency, and extending battery life, our solutions help customers lower their environmental impact without sacrificing performance."