Flame Security International
FSI-Mech Paint


Product Name: FSI FIRECOAT Exterior

Previously known as FSI-Paint. A tough, durable polymer based internal and external undercoat paint for use on a variety of substrates which includes existing render, timber, aluminium, steel, concrete, plasterboard and brick.  It can be sprayed, rolled or brushed. It is uniquely rated to BAL-40 for extreme fire protection.

Non toxic, safe for human handling
Will last at least 10 years
Comes as a light grey colour
Applied in the same manner as any other undercoat paint
Designed by the University of NSW and manufactured in Australia and Europe

Fire Retardant Certifications

  • AS1530.8.1 (BAL-40) - Extremely high bushfire rating
  • AS 5637.1-2015 - Fire Classification | Group 1 AS/NZS 3837
  • AS 1530.4-2014 - Steel Protection | FRL 90/90/90
  • AS 1530.4-2014 - Plaster board wall system* | FRL 60/60/60
  • ASTM D2898 Method B - Accelerated weathering testing
  • ISO 5660 - Heat release and smoke production

*Plasterboard wall system: 13 mm standard grade plasterboard over 35 mm x 70 mm timber framing with glass wool insulation.

Dermal & Ocular Certifications


Fire Testing: Large Scale Fire Test
Burn test video. 
Fire Testing: Lab Demonstration
Open flame test on FSI treated timber and untreated timber. 
Fire Testing: BAL-40 Test for FSI FIRECOAT Exterior

BAL-40 Bushfire attack level 40 is an Australian standard test that measures the fire resistance of buildings when exposed to a simulated bushfire attack. It is also known by the Australian Standards number AS1530.8.1. Until this test of FSI-Paint conducted at Warrington Fire in October 2022, no paint or coating had passed the rigorous testing criteria to achieve the BAL-40 rating. This test simulates increasing levels of ember attack ignited by windborne burning leaves and debris. This, together with increasing heat flux, plus the increased likelihood of exposure to flames constitutes BAL-40.

Warrington Fire is a NATA accredited facility in Melbourne, Australia. A test was conducted on an external, windowed building façade treated with FSI FIRECOAT Exterior. The façade consists of timber weatherboard, specifically radiata pine, the most combustible and commonly used timber in Australia. FSI FIRECOAT Exterior was applied as a primer and undercoat paint, then a standard commercial topcoat – Brown Dulux Weathershield Low-Sheen was applied. The FSI FIRECOAT Exterior was exposed to the flame attack of a BAL-40 furnace for 10 minutes. The façade was monitored using thermocouples to test the internal and rear temperatures and to determine the ability of FSI FIRECOAT Exterior to protect the structural integrity of the building façade, as well as prevent the flames from spreading to the inside and rear of the facade over 60 minutes.

FSI FIRECOAT Exterior succeeded in passing all six of the stringent criteria. This is the first time any paint has achieved the BAL-40 rating.

NATA = National Association of Testing Authorities