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| Term | Description |
|---|---|
| Polyisobutylene (PIB) | A product formed by the polymerization of isobutylene; may be compounded for use as a roof membrane material. |
| Term | Description |
|---|---|
| Polyisobutylene (PIB) | A product formed by the polymerization of isobutylene; may be compounded for use as a roof membrane material. |