Division C - Accepted Materials
Paraboard HD Pro (Siplast)
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.
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- Manufacturer
- Siplast, Inc. (A Division of GAF Materials Canada ULC)
- Accepted for the RoofStar Guarantee Program
- June 11, 2026
- Accepted for application in
- Waterproofing Roof Systems
Grade-level Waterproofing Systems
- Acceptance Criteria
- None
- Product Summary
- Paraboard™ HD Pro is a factory-laminated panel designed for use as the coverboard and base sheet layer of a multi-ply modified bitumen roofing system. Paraboard™ HD Pro consists of a polyester reinforced SBS-modified bitumen base sheet (Paradiene 20 PR) coated with a proprietary Syntan® acrylic coating factory-laminated to a high-density, closed-cell polyisocyanurate insulation board. The Syntan® coated surface, in place of a silica parting agent, is formulated for use with liquid-applied and self-adhered cap sheets.
- (adapted from the Technical Data Sheet).
- Conditions and Limitations
- See possible slope limitations listed on the downloadable Technical Data Sheet.
- Technical Data Sheet
- Click the "PDF" icon to open the TDS in a new window.
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