PORON® 40V0 Foam: Flame-Retardant Sealing Material for Advanced Applications

Rogers Corporation has launched PORON® 40V0 foam, a next-generation polyurethane foam designed to meet the growing need for flame-retardant, cost-effective, and highly conformable sealing solutions.Unlike traditional polyurethane foams, PORON 40V0 delivers UL 94 V-0 performance in a thin, soft, compressible material. This makes it an ideal solution for procurement professionals and engineers balancing compliance, performance, and cost.

Why PORON® 40V0 Foam Matters

UL 94 V-0 Flame Rating in Thin Foam Gauges

Presents V-0 performance at 3–10 mm thicknesses, eliminating the need for thicker, rigid foams to meet compliance. Where customers need the higher level of flame protection, 40V0 is a step above the standard Poron which only meets the UL 94 horizontal burn test. The 40V0 can handle the tougher vertical burn test as well.

Soft, Gap-Filling Sealing Material

Maintains excellent compression set resistance, ensuring reliable performance over long-term use and repeated cycles.

Halogen-Free, Siloxane-Free Chemistry

Reduces contamination in sensitive electronics, improving safety and compliance.

Cost-Effective Alternative to Silicones

Delivers flame safety at a lower cost when moisture sealing or high-heat resistance is not the primary need.

Applications for PORON® 40V0

Battery Energy Storage Systems (BESS): Cushioning and flame-rated seals between cells and modules.
Electric Vehicles & Charging Infrastructure: Control modules, junction boxes, and chargers.
Data Centers & Servers: Acoustic and vibration damping for fans and airflow systems.
HVAC & Industrial Systems: UL 94 V-0 gaskets for vents, dampers, and housings.

PORON® 40V0 vs. Silicone Foam

Material Selection Comparison
Property	PORON® 40V0 (Polyurethane)	Silicone Foam
Flame Rating	UL 94 V-0 (3–10 mm)	UL 94 V-0 (varied thicknesses)
Compressibility	Soft, highly conformable; excellent gap-filling	Soft to medium; good gap-filling
Compression Set	Excellent long-term seal force retention	Good to excellent depending on grade
Moisture Sealing	Moderate; not ideal for IP-rated waterproofing	Excellent; preferred for moisture/dust ingress protection
High-Temperature Resistance	Moderate	Excellent
Chemistry	Halogen-free, siloxane-free	Silicone elastomer; inherently stable
Typical Use-Case	BESS, EV/HEV, data centers, HVAC	Outdoor enclosures, high-heat zones
Relative Cost	Lower (cost-effective alternative)	Higher

Selection tip: Use PORON® 40V0 for flame safety and cost efficiency. Use silicone foam when superior moisture sealing or high-temperature resistance is critical.

How Sealing Devices Adds Value

Material Expertise: Guidance on whether PORON, silicone, or other elastomers best fit your needs.
Custom Fabrication: Die-cutting, laminating, kitting, and adhesive backing for easy integration.
Prototyping & Testing: Validate compression, thermal, and flame performance in your application.
Trusted Supply Chain: As a Rogers Preferred Converter, we provide reliable availability and compliance assurance.