Materials:Paraflex 531

Division C - Accepted Materials

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Paraflex 531 Liquid Membrane Flashing
by Siplast, Inc. (A Division of GAF Materials Canada ULC)

Material Acceptance and Product Details The information published in the RCABC Roofing Practices Manual and offered below does NOT represent a complete set of the manufacturer’s data or specifications, nor is this material recommended or endorsed by the Guarantor. The preparation of a detailed specification is the responsibility of the Design Authority.

Manufacturer Siplast, Inc. (A Division of GAF Materials Canada ULC) Accepted for the RoofStar Guarantee Program June 11, 2026 (Provisional acceptance October 21, 2022) Accepted for application in Waterproofing Roof Systems Grade-level Waterproofing Systems Acceptance Criteria None Product Summary Paraflex 531 Liquid Flashing is a liquid-applied, multi-component, flexible membrane resin using silane-terminated polymer (STP) chemistry. Paraflex 531 Liquid Flashing is used in conjunction with Pro Fleece to field-construct Paraflex 531 Flashing Membrane. (adapted from the Technical Data Sheet) Conditions and Limitations Accepted for use as a liquid cap membrane flashing in an SBS-modified bituminous membrane system acceptable to the manufacturer. Technical Data Sheet Click the "PDF" icon to open the TDS in a new window.

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