CPVC Compound “Durastream α”

SEKISUI CHEMICAL Group is working to reduce its environmental impact across the group, and has played a leading role in driving sustainability in the chemical industry.

“Durastream α” is a product made from CPVC (chlorinated polyvinyl chloride resin), which originally has a low environmental impact, from a sustainability perspective.

What is “Durastream α”?

“Durastream α” is a product within the “Durastream” range that is specifically designed to reduce environmental impact.

CPVC is composed of 70% chlorine, making it less dependent on petroleum than other plastic materials.
In addition, “Durastream α” is an environment friendly CPVC compound that does not use tin as a stabilizer.

Durastreamα logo
Durastream α logo
CPVC Compound
CPVC Compound

Recent Trends in Stabilizers

As the molding and decomposition temperatures of CPVC are close, thermal decomposition is likely to occur, and stabilizers are used to prevent this.
In the past, lead and cadmium were used, but restrictions have been imposed from an environmental perspective and tin has become more common in recent years.
However, it was also pointed out that tin is not desirable from the perspective of its impact on the human body and health if it is not handled properly.

This led to a growing interest in tin-free stabilizers, and Sekisui was the first in the world to establish mass production technology, giving birth to “Durastream α”.


Product overview

CPVC pipes and CPVC fittings made from the CPVC compound “Durastream α” are highly suitable for hot and cold water supply plumbing applications.

  For related pages on CPVC pipes and fittings for hot and cold water supply cases, click here

SEKISUI is itself a molding manufacturer and has high technological capabilities in the field of molding, including extrusion and injection molding.
In addition to selling CPVC compounds, we can also offer process proposals based on our knowledge as a molding manufacturer.

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  For related pages on CPVC molding methods, click here

CPVC pipes
CPVC pipes
CPVC pipes
CPVC pipes
CPVC fittings
CPVC fittings

Why choose “Durastream α”?

The strength of “Durastream α” is its friendliness to nature and people. It also inherits the excellent performance of “Durastream” and has the generous implementation support that only SEKISUI can provide.

In terms of performance, the product offers excellent performance in various functions such as heat resistance, flame resistance, low smoke emission, mechanical strength, insulation, voltage resistance and chemical resistance, and has high impact resistance amongst the many CPVC products available.

In addition, SEKISUI can flexibly respond to customer requirements in raw material formulation, allowing chlorination levels to be changed as required and heat resistance and formability to be adjusted.

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We provide extensive introduction support to molding manufacturers by dispatching engineers from the product planning and design stage through to the selection of molding equipment, prototyping and production improvement. This is a strength made possible by the fact that SEKISUI is also a molding manufacturer.

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As for international certification, the company is highly trusted because it is certified by the National Sanitation Foundation (NSF), a strict international standard.

Matrial Properties
NSF certification
NSF certification


hot and cold water supply CPVC piping
installation image for hot and cold water supply pipework

“Durastream α” has been introduced as a highly suitable performance product for hot and cold water supply pipework applications.
In recent years, CPVC pipework for hot water and water supply made from “Durastream α” has been installed in a wide range of building types in many different countries and regions.

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SEKISUI Chemical Group is committed to developing better products for its customers, the molding manufacturers, by designing formulations that meet their standards.


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