How It Works

Thermo-responsive gel technology that creates an active barrier against fire — made with natural ingredients.

Hand spraying Sallus Fire Retardant Spray onto a wooden log
The Science

Thermo-Responsive Technology

Sallus Fire Retardant uses a water-based gel formulation that reacts to temperature. Under normal conditions, the gel remains inert and transparent on the treated surface.

When exposed to high temperatures, the gel undergoes a phase transition — rapidly expanding to form an insulating layer that prevents flame spread and protects the underlying material.

This technology is fundamentally different from traditional ammonium phosphate-based retardants, which are toxic and harmful to the environment. Sallus Fire Retardant is based on natural and mineral ingredients, and biodegradable.

The Process

From Application to Protection

01

Application

Apply to the clean surface, undiluted. 1L covers 4m² on average.

02

Ready to Act

The product is ready to protect immediately after application, preserving the original appearance. The surface is ready for immediate use.

03

Safe Protection

Under normal conditions, the barrier is invisible and does not affect the treated material.

04

Thermal Activation

When exposed to flames, Sallus expands, forming an insulating layer that slows the spread of fire.

Step by step with the 1L Spray

Ready to use, no dilution. For complete protection, always apply evenly.

  1. 1.Shake

    Shake the bottle well before use.

  2. 2.Open

    Turn the trigger nozzle to the open position.

  3. 3.Apply

    Apply an even coat to the clean surface.

  4. 4.When exposed to flame

    When a flame hits it, the Sallus coat slows the spread of fire.

  5. 5.Clean

    If you no longer need the protection, you can remove the product by scrubbing the area with plenty of water.

  6. 6.Refill

    When the bottle is empty, move the trigger to the 1L Refill.

See the 1L Spray

Watch the fire tests

Wood and a firelighter treated with Sallus Fire Retardant, exposed to a flame.

Treated wood exposed to a flame
Treated firelighter exposed to a blowtorch

Technical Performance Data

Coverage per litre
~4 m²
For wood and forestry applications. May vary depending on surface and application method
Durability
Up to 2 weeks under normal conditions
How often to reapply depends on how exposed the surface is
Application temperature
5°C – 40°C
Application method
Spray, Brush application, or Pour Directly
Dilution
Ready to use (no dilution required)
Concentrated version available for volume purchases

Not sure how much you need?

Use our calculator to find the ideal quantity for your area.

Calculate Now

Experience the Sallus Technology

The most advanced fire protection, available in 3 formats.

View Solutions