NBR Foam Sheets: Top Choice for Insulation And Sealing Applications

NBR foam sheet, also known as Vinyl Nitrile foam or PVC NBR foam, is a highly versatile and reliable material. It can be easily fabricated into tapes, strips, gaskets, pads, sheets, and more. Widely used for sealing, gasketing, thermal insulation, soundproofing, and vibration dampening, NBR foam is a foamed polymer blend of PVC and Nitrile rubber. Unlike solid and rigid Nitrile rubber, it has a flexible, cellular structure that enhances its performance in a variety of applications.

ECONOMICAL: flexible and easy to handle, in width to ensure easy installation on ducts.

PRACTICAL: the self-adhesive surface has been made rougher to improve its grip on the metal ducts.

CONVENIENT: its width cuts down on application time, reducing the final cost of pre-fabricated ducts.

FLEXIBLE: high elasticity helps attenuate vibrations that occur where there are joints and suspensions.

How to Easily Identify NBR Foam from Other Foam Materials

When you get a piece of NBR foam sheet from foam suppliers, you can quite easily distinguish it from other foam materials like EVA foam, Polyethylene foam and Neoprene sponge by following the below 3 main methods:

1.Finishing and Appearance:

Genuine PVC Nitrile foam features a smooth, uniform, and soft outer skin on one or both sides—especially noticeable in foam sheets thicker than 8 mm. The surface feels flexible and resilient to the touch. When viewed from the side, the foam reveals a structure filled with clearly defined, uniform cells. While black is the standard color, custom colors are also available—commonly seen in products like colorful NBR yoga mats.

2.Foam Sheet Size:

Vinyl Nitrile foam sheets are typically produced and supplied in roll form, with a standard width of 1 meter and lengths of up to 10 meters. Thickness options range from 2 mm to 40 mm. As noted earlier, NBR foam sheets under 8 mm thick generally have a soft skin on only one side. PVC Nitrile foam is available in both closed-cell and open-cell structures, but closed-cell foam is the more common and preferred choice for most applications due to its superior sealing and insulation properties.

3.Finished Products:

PVC Nitrile foam is highly compatible with a wide range of fabrication techniques, including steel die-cutting, PSA lamination, vertical sawing, and custom pad printing. These processes allow us to transform PVC NBR foam into a variety of finished products such as Nitrile foam tapes, seals, gaskets, sealing strips, printed foam mats, seat cushions, and more.

Specifications and Properties - Closed Cell Nitrile Foam Sheet:

▶Size in roll sheet with maximum length 10 m x maximum width 1 m x thickness ranging from 2 mm to 8 mm and custom sizes available.

▶General color is black and other colors can be flexibly customized according to customer requirements.

▶Foam Density ranging from 70-90 kg/m³

▶Crafted from durable PVC and Nitrile rubber, Vinyl Nitrile foam offers outstanding cushioning and shock absorption.

▶With closed cell structure, PVC Nitrile foam also have superior performance on thermal and acoustic insulation.

▶As a soft and flexible closed-cell foam, resilient PVC Nitrile foam easily conforms to uneven surfaces, providing an effective and reliable seal.

▶Vinyl Nitrile foam are also excellent at resistance to abrasion, water, weathering and oil etc.

Versatile Applications and Product Solutions with PVC Nitrile Foam

NBR Foam Gaskets, Seals and Strips

PVC NBR foam sheets possess exceptional sealing and insulating properties. They can also be readily fabricated into NBR foam gaskets, foam seals, and foam weatherstrips—products widely utilized in construction, building, automotive, and other industrial fields.

Nitrile Foam Tape

As Vinyl Nitrile foam has so many good physical properties, they are quite suitable to be manufactured as foam tape with or without adhesive backing. By utilizing our high efficient automated slitter, we have the capability to process PVC/ Nitrile foam tape in various custom sizes.

Egg Crate Convoluted Nitrile Foam Sheet

Additionally, Nitrile foam sheets can be molded into an egg-crate style convoluted structure, much like polyurethane foam. This textured Nitrile foam acts as a robust sound barrier, delivering exceptional acoustic insulation and flame-retardant capabilities for diverse applications—including acoustic conference rooms, theaters, testing facilities, and other environments where noise control is critical.

Common Applications & Industrial Sectors

♦Construction and Buildingsound dampening

♦Industrial Thermal Insulation

♦HAVC Systems

♦Automotive Seals and Gaskets

♦Soundproof Applications

Client Case Studies: Customized PVC Nitrile Foam Gaskets with Adhesive

PVC NBR foam gaskets deliver flexible padding, reliable sealing, and effective shock absorption for automotive components. Equipped with a self-adhesive backing, these nitrile foam gaskets significantly simplify installation. Manufactured using our high-efficiency foam die-cutting equipment, they adhere to strict dimensional tolerances. We utilize premium acrylic adhesive backing combined with a white release liner, ensuring robust and long-lasting adhesive performance over time.

TOPSUN:NBR Foam Sheet Provider

TOPSUN is a specialized foam supplier offering a comprehensive range of materials, including EVA foam, cross-linked polyethylene foam, PVC/NBR foam, neoprene foam rubber, and more. Among these, PVC/NBR foam stands as one of our core materials. We excel at tailoring it to meet diverse needs, producing custom solutions such as NBR foam sheets, strips, tapes, gaskets, and pads. Beyond material provision, TOPSUN works closely with clients to co-develop optimal custom solutions, ensuring seamless adaptation of PVC Nitrile foam for various application requirements.