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Chlorosulfonated Polyethylene (CSPE)

Where is it Commonly Found?

Roof membranes, electrical connectors, sheet liners for ponds
Like all other chlorinated materials, is associated with the known carcinogen dioxin, and other POP (persistent organic pollutants), and PBT (persistent bio- accumulative toxins).

What are its known health effects?

Carcinogen (NTP-C) (P65)

Developmental Toxicant (P65)

What are its suspected health effects?

Cardiovascular or Blood Toxicant (ATSDR) (EPA-HEN) (LADO - L) (OEHHA-CREL)

Endocrine Toxicant (BKH) (BRUC) (IL-EPA) (JNIHS) (KEIT) (OEHHA-CREL) (WWF)

Gastrointestinal or Liver Toxicant (EPA-HEN) (LADO - L) (OEHHA-CREL) (ZIMM)

Immunotoxicant (ATSDR)

Neurotoxicant (STAC)

Reproductive Toxicant (OEHHA-CREL)

Respiratory Toxicant (OEHHA-CREL)

Skin or Sense Organ Toxicant (EPA-HEN) (HAZMAP) (KLAA)

Alternative Materials

See permitted uses column for alternate plastics for electrical connectors, sheet liners for ponds. EPDM type roofs are an alternate for roofing membranes.

Does it Correspond With Any Green Building Credits?

Green Guide for Health Care - MR Credit 4.1 - PBT Elimination: Dioxins;
Living Building Challenge 1.3 – Prerequisite 5: Materials Red List;
Living Building Challenge 2.0 - Red List;
Pearl Building Rating System v1.0 SM-1: Non-Polluting Materials;

How is it Categorized?

Chlorinated Polymers

What is its Origin?

"Hypalon" is the trademark name for chlorosulfonated polyethylene (CSPE) synthetic rubber (CSM).

Divisions and Sections

Div 07 Chlorosulfonate-Polyethylene (CSPE) Roofing

Div 09 Tiling & Stone Tiling

Div 33 Utilities

General Reference