Rigid PVC Gaskets and Seals

Rigid PVC, also known as PVC-U or unplasticised PVC, is a thermoplastic material manufactured without the plasticisers used to create flexible PVC.

It provides good stiffness, chemical resistance, low moisture absorption and electrical insulation, making it suitable for a wide variety of industrial and engineering components.

Rigid PVC combines good dimensional stability with useful resistance to many chemicals and very low moisture absorption.

These properties make it suitable for accurately cut gaskets, separators and interface components where rigidity and environmental resistance are more important than substantial compression.

Rigid PVC components can typically operate within a temperature range of approximately -15°C to +60°C, although the exact limits depend upon the material grade, thickness, mechanical load and operating environment.

Applications involving sustained temperatures above this range should be reviewed before specifying rigid PVC.

Rigid PVC provides good resistance to many acids, alkalis and aqueous industrial chemicals.

It is not universally chemically resistant, however, and certain solvents, aromatic hydrocarbons, ketones and other aggressive chemicals can attack the material. Compatibility should therefore be checked where chemical exposure is significant.

Yes. Rigid PVC absorbs very little moisture and is widely used in wet, humid and water-handling environments.

Its low water absorption helps components retain their dimensions and mechanical properties during prolonged exposure to moisture.

Yes. Rigid PVC provides good electrical insulating properties and can be used for gaskets, barriers, separators and other non-conductive components within electrical equipment.

Final suitability will depend upon factors including grade, thickness, voltage and operating conditions.

Rigid PVC has very limited compressibility compared with rubber, foam and other elastomeric materials.

It is therefore generally better suited to rigid gaskets, separators and interface components than to applications where substantial compression is required to create a pressure-tight seal.

Rigid PVC is stiff and dimensionally stable, making it suitable for firm separation, electrical insulation and accurately defined gasket or interface components.

Flexible PVC contains plasticisers that make it softer and more adaptable, so it can provide cushioning and light compression sealing. The best material depends upon whether rigidity or flexibility is the primary requirement.

Both materials provide low moisture absorption and useful chemical resistance.

Rigid PVC is generally stiffer and provides good electrical insulation and corrosion resistance, while polypropylene is lighter and may offer advantages where low density, fatigue resistance or particular chemical compatibility is required.

Acetal generally provides greater mechanical strength, wear resistance, low-friction performance and dimensional precision than rigid PVC.

Rigid PVC can provide a more economical solution where chemical resistance, electrical insulation and low moisture absorption are the principal requirements.

Yes. Rigid PVC does not rust or corrode in the same way as metallic components and provides excellent resistance to many damp and chemically exposed environments.

This can make it useful as a non-metallic gasket, separator or protective interface within equipment where corrosion resistance is important.

Yes. Bluemay Weston manufactures bespoke rigid PVC gaskets and sealing components to customer drawings, dimensions, samples and specifications.

Components can be produced in simple circular and rectangular formats as well as complex profiles incorporating apertures, fixing holes, slots and other features.

Bluemay Weston manufactures rigid PVC gaskets and sealing components from sheet material using precision punching and water jet cutting techniques.

Punching provides an efficient manufacturing method for suitable repeat production quantities, whilst water jet cutting is particularly useful for prototypes, lower-volume production, larger components and complex profiles where dedicated tooling may not be appropriate.

Bluemay Weston can manufacture rigid PVC gaskets and sealing components in quantities ranging from prototypes and small development batches through to high-volume production runs of many thousands or millions of components, depending on component size, material specification and customer requirements.