Waterproof Low Density PVC Foam

Waterproof Low Density Closed Cell PVC Foam for Sealing and Gaskets

Topsun waterproof low density PVC foam is a soft, compressible closed cell PVC sponge material designed for sealing against light, dust and water when properly compressed. It is suitable for door and window seals, automotive body seals, HVAC systems, appliance sealing, electronic equipment, outdoor lighting and custom die-cut gaskets.

This P090 PVC foam has a density of 95±10 kg/m³ and can be supplied in thicknesses from 0.5 mm to 25 mm. Its low-density structure provides low compression force, flexibility and conformability, allowing the foam to follow curves, corners and irregular surfaces.

Topsun can convert closed cell PVC foam into sheets, rolls, strips, tapes, pads, gaskets and other custom foam components. Cutting, slicing, lamination, adhesive backing, laser cutting and die cutting are available according to drawings, samples and application requirements.

Low Density Closed Cell PVC Foam Features

Low compression sealing: 30% compression provides an effective seal against light, dust and water in properly designed assemblies.

Closed cell structure: suitable for sealing and gasketing applications where moisture resistance and controlled compression are required.

Good conformability: soft PVC sponge foam can conform to curves, corners and irregular surfaces.

Weather resistance: suitable for many indoor and outdoor sealing applications where weather exposure must be considered.

Low-temperature flexibility: designed for applications requiring flexible foam sealing under changing environmental conditions.

Vibration damping: can provide cushioning and vibration isolation between assembled components.

Sound attenuation: useful as a soft interface material in equipment, appliances and vehicle assemblies.

Custom fabrication: available as sheets, strips, adhesive-backed tapes, gaskets, pads and custom die-cut components.

Waterproof PVC Sponge Foam Technical Specification

The following test data applies to the existing P090 low density PVC foam specification. For production projects, final material selection should be confirmed according to the required compression, thickness, sealing conditions and application environment.

Why Use Low Density PVC Foam for Sealing?

Low density PVC foam requires relatively low force to compress, making it useful where thin panels, plastic housings, metal enclosures or other components should not be subjected to excessive sealing pressure.

The closed-cell structure and soft surface allow the foam to follow irregular gaps when compressed. This helps create continuous contact between mating surfaces in door frames, equipment panels, HVAC assemblies and vehicle components.

Sealing performance depends on joint design, foam thickness, compression percentage, fastener spacing and the condition of the contact surfaces. Customers should provide these details when the application requires a defined water, air or dust seal.

Applications of Waterproof Low Density PVC Foam

PVC Sponge Foam Product Video

What Is Closed Cell PVC Sponge Foam?

Polyvinyl chloride foam, commonly called PVC foam or PVC sponge foam, is a cellular PVC material used for sealing, gasketing, cushioning and vibration-control applications.

This product uses a closed-cell structure designed to provide an economical sealing solution against light, air, moisture and dust when appropriately compressed in the finished assembly.

PVC foam properties can be adjusted through material density, hardness, thickness and resilience. Topsun supplies PVC foam products covering different density and hardness ranges for different sealing, cushioning and assembly requirements.

Typical applications include vehicle body vibration damping, door and window seals, water tank sealing, HVAC seals, electronic product cushioning and customized gasket components.

Closed Cell PVC Foam vs. Open Cell Foam

Cell structure is an important consideration when selecting foam for sealing. Closed cell PVC foam contains predominantly isolated cells, which makes it more suitable for water, air and dust sealing than open-cell materials in many compressed gasket applications.

Custom PVC Foam Sheet, Strip, Tape and Gasket Options

Topsun can supply low density PVC foam as raw material or convert it into components ready for assembly. Customers can provide drawings, samples or finished dimensions for evaluation.

How to Select Low Density PVC Foam for Sealing

The correct PVC foam specification depends on the finished joint rather than thickness alone. Buyers should consider compression percentage, gap size, environmental exposure, sealing requirement and assembly method.

For a new project, provide the required thickness, dimensions, compression gap, application location, sealing requirement, adhesive requirement, temperature conditions and drawing or sample. This information helps determine whether the P090 low density PVC foam is appropriate for the application.

If the foam will be used as a waterproof gasket, also provide the joint structure and expected compression so that sealing performance can be evaluated under the actual assembly conditions.

Topsun Foam Processing Capabilities

Topsun provides foam material supply together with custom converting services for industrial buyers, manufacturers and component suppliers.

1. Cutting: foam sheets, blocks and components can be cut according to customer dimensions.

2. Slicing: foam can be sliced to the required thickness.

3. Lamination: hot-melt film lamination, flame lamination and pressure-sensitive adhesive lamination are available.

4. Laser Cutting: customized foam shapes can be produced according to drawings for suitable projects.

5. Die Cutting: tooling can be produced according to customer designs for volume production of gaskets, pads, seals and other foam components.

6. Compression Molding: three-dimensional molded foam and foam composite components can be manufactured for applications requiring defined geometry.

7. Engraving: suitable for customized tool-box inserts and protective packaging inserts.

8. Silk-Screen Printing: logos and patterns can be printed on suitable foam surfaces.

9. Adhesive Backing: adhesive and release liner can be laminated to foam to manufacture tapes, strips, gaskets and self-adhesive components.

Foam Materials Available from Topsun

In addition to PVC foam, Topsun supplies EVA foam, PE foam, XPE foam, IXPE foam, CR foam, EPDM foam, neoprene foam, SBR foam, NBR foam and micro-cell soft PVC foam. Materials can be supplied as sheets and rolls or processed into customized foam components.

About Topsun Foam

Topsun is a professional supplier of foam materials and customized foam products. We provide material supply together with cutting, slicing, lamination, adhesive backing, laser cutting, die cutting and other foam converting services.

Our factory is located in Changzhou City, Jiangsu Province, China, with convenient access to Shanghai Port. Customers can provide drawings, samples, dimensions and application requirements for product evaluation.

Waterproof Low Density PVC Foam FAQ

What is low density closed cell PVC foam?

Low density closed cell PVC foam is a soft, compressible polyvinyl chloride sponge material used for sealing, gasketing, cushioning and vibration-control applications. Its closed-cell structure makes it suitable for many applications requiring resistance to light, dust, air and moisture penetration.

Is this PVC foam waterproof?

The P090 PVC foam is designed for water-sealing applications, and the existing product specification states that approximately 30% compression provides an effective seal against light, dust and water. Actual waterproof performance also depends on joint design, compression and installation conditions.

What is the density of this low density PVC foam?

The specified density of this P090 closed cell PVC foam is 95±10 kg/m³ according to ASTM D1667.

What thicknesses are available?

This low density PVC foam product is available in thicknesses from 0.5 mm to 25 mm. Finished thickness should be selected according to the gap and expected compression in the assembled component.

What applications are suitable for closed cell PVC foam?

Typical applications include door and window sealing, truck and vehicle body seals, HVAC equipment, appliance sealing, electronic enclosures, outdoor lighting, railway or marine components and custom die-cut gaskets.

Can low density PVC foam conform to irregular surfaces?

Yes. The low density and soft hardness of this PVC foam allow it to conform to curved and irregular surfaces when compressed. This is useful for sealing joints where surfaces are not completely flat.

Does this PVC foam meet FMVSS 302?

The technical specification provided for this product lists FMVSS 302 with a result of Pass. If a project requires specific documentation or additional flame performance, please provide the required standard before ordering.

Does this PVC foam comply with RoHS requirements?

The existing product test data lists RoHS 2011/65/EU and (EU) 2017/2102 as Pass. PFOA/PFOS testing according to CEN/TS 15968(2010) is also listed as Pass.

Can Topsun supply adhesive-backed PVC foam?

Yes. Topsun can laminate pressure-sensitive adhesive and release liner onto suitable PVC foam to produce self-adhesive sheets, strips, tapes, gaskets and custom components for easier positioning during assembly.

Can Topsun manufacture custom PVC foam gaskets?

Yes. PVC foam can be cut, sliced, laser cut and die cut according to customer drawings, dimensions or physical samples. Custom gaskets, pads, strips and sealing components can be produced according to project requirements.

How should I choose the correct PVC foam thickness?

Thickness should be selected according to the installation gap and required compression after assembly. For sealing projects, provide the minimum and maximum gap, contact surfaces and required sealing performance so the material can be evaluated more accurately.

What information should I provide for a PVC foam quotation?

Please provide thickness, width and length or finished part dimensions, application, required compression, sealing requirement, adhesive requirement, drawing or sample and estimated order quantity.

Where is the Topsun foam factory located?

Topsun's factory is located in Changzhou City, Jiangsu Province, China, with convenient access to Shanghai Port.

How can I request low density PVC foam samples?

Send your requirements to july@topsunfoam.com with the required thickness, dimensions, sealing application, adhesive requirement and estimated quantity for evaluation.