Manufacturers:Tremco Ltd.

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Manufacturers:Tremco Ltd.

Division C - Accepted Materials

Tremco Ltd.
Associate Member (Manufacturer)

Materials Listed by Category

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.

Contact Address
See the current Membership list and contact information at
Country of Origin
Country of Manufacture
Canada, USA, Europe
Year First Installed
BC: 1988
Canada: 1983
Foreign: 1928
Notice and Disclaimer: Technical Data Sheets for SBS and APP Polymer-modified bituminous membranes

Bituminous roofing membranes are governed by RGC Acceptance Criteria RGC ACWP-MOD (applicable to membranes accepted after July 1, 2023). The CSA Standard for these membranes, CSA A123.23 "Product specification for polymer modified bitumen sheet, prefabricated and reinforced", forms the backbone of the RGC Acceptance Criteria and has replaced the older CGSB Standard CGSB 37-GP-56M, which was withdrawn in 2015.

The "British Columbia Building Code" (2024) references the CSA A123.23 Standard in both Part 5 and Part 9 of Division B. The Standard is also published in the National Building Code of Canada (2020), and the City of Vancouver Building Bylaw (2024).

Not all manufacturers of SBS and APP polymer-modified membranes publish technical data sheets that fully align with the CSA Standard. Therefore, the reader must verify this information independently of the RGC, to the reader's own satisfaction. Consult the local manufacturer's representative through the "Find a Member" page on the RCABC association website.

Waterproofing Roofs

BUR Systems

Therm 100 (awaiting TDS)
Upgraded BUR (awaiting TDS)

SBS Polymer-Modified Bituminous Membranes

(See the membrane tables in Division C)

Hybrid Bituminous EPDM Membrane Systems

(See the membrane tables in Division C)

TRA-LRM (awaiting TDS)
TRA-LRM (V) (awaiting TDS)

Waterproofing Roofs

PVC Membranes

(See the membrane tables in Division C)

Tremply KEE

Polyurethane Membranes

(See the membrane tables in Division C)

AlphaGuard MT Base Coat
AlphaGuard MT Top Coat
AlphaGuard MTS Base Coat
AlphaGuard MTS Top Coat


© RCABC 2024
No reproduction of this material, in whole or in part, is lawful without the expressed permission of the RCABC Guarantee Corp.