Gyprock Fire Mastic is a permanently flexible, water based acrylic sealant for fire resistant caulking of penetrations and joints in plasterboard walls and ceilings.
Product Overview
Gyprock Fire Mastic is an off-white, low VOC, fire and acoustic sealant manufactured to stringent product specifications, and features in many Gyprock fire and acoustic rated systems. It is a one-part water based sealant with a working life of 30 minutes and a skin time of 15mins. It provides a neutral paintable surface once cured, and is intumescent, expanding when exposed to fire or extreme heat.
Typical Applications
Gyprock Fire Mastic is designed to create a fire resistant seal around pipes, conduits, busways, cable trays and ducts which penetrate walls, floors and ceilings. It will bond to plasterboard, masonry, concrete, steel, and cable coverings.
CSR Gyprock only support the use of Gyprock Fire Mastic sealant when used as part of specified Gyprock systems as noted in our literature.
Extensively Tested
Fire Testing
Gyprock Fire Mastic has been tested for periods of up to four hours, in systems, in accordance with AS1530.4 and achieved the following fire resistance levels (FRL):
- Plasterboard systems up to FRL 120/120/120.
- Masonry systems up to FRL 240/240/240.
Mechanical Testing
Tests to AS4072 have shown that Gyprock Fire Mastic has movement capabilities of ±20% after curing, which means that this product remains flexible and resists cracking.
Key Features
Sealant
Off-white acrylic sealant
Fire-rated Properties
Assists in fire-rated caulking of penetrations and junctions
Acoustic Properties
High acoustic rating when used in a system
Technical Specifications
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Installation Instructions
AS/NZS2589: Gypsum linings – Application and Finishing outlines the procedures for the installation and finishing of Gyprock Perforated Plasterboard in conjunction with additional details contained in Gyprock Technical Literature.
