Belzona 9000 Series

Belzona 9321

Reinforcement Sheet

A flame-retardant fiberglass reinforcement sheet for use with Belzona 3211 Lagseal insulation cladding systems.

A flame-retardant fiberglass mesh used with Belzona 3211 to reinforce insulation cladding membrane systems.

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  • SeriesBelzona 9000 Series

Overview of Belzona 9321

Belzona 9321 is an open weave, bonded, shedding-resistant fiberglass mesh treated for flame retardancy, used with Belzona 3211 (Lagseal). Embedded between coats of Belzona 3211, the sheet adds tensile strength to the seamless, flexible insulation cladding membrane and helps the system conform tightly to insulation contours, corners, and detail areas.

Key Benefits

Open weave fiberglass construction allows full impregnation by Belzona 3211 for a reinforced membrane
Flame-retardant treatment supports the Class O / Class A fire performance of the Belzona 3211 system
Bonded and shedding-resistant for clean handling and consistent application
Reinforces detail areas including corners and transitions where mechanical stress is highest
Supports long-term water and weather protection of insulation and cladding systems

Application Areas

What this product handles, grouped by equipment area — each links to the full application.

Primary application area

Pipelines

1 application

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Local · Authorized · Supply + Apply

Need Belzona 9321 applied
on your asset?

Our Louisiana team supplies and applies it — with 24-hour support, no shutdown, no hot work.

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