Classified and approved varnish M1 - Varnish fireproof

M1 STARDUST Varnish – FUHS44 is a glossy and colourless solvent-based polyurethane varnish.

Our classified and approved non-flammable varnish is designed to promote fire protection, retard flame spread, and limit the temperature rise of materials.

Its reaction to fire is excellent since it does not feed the flame.

Its resistance to fire and high temperatures limits the spread of a fire.

Stardust also offers a varnish that meets the “Euroclass” fire classification, ranging from A to F.

Our varnish complies with the NF P92-507 standard and is classified as M1 non-flammable.

Conditions of validity of the approval:

When applied to raw material, as indicated in the certification, the approval of the varnish is validated on a non-insulating M0 support.

Features

Transparent, colourless, hard and glossy finish

Two-component type (our offer includes the hardener)

Coverage: 6 to 10 m² depending on the substrate and thickness

VOC < 420 g/L

Mixture: By weight, 100 parts clearcoat, 33 parts hardener

Application: Spray gun or roller

Thickness: 25 to 50 µm dry

Application: French building

Dilution possible with all lacquer or PU thinners

Dry to the touch: 60 min / through-dry: 24 hours

Fire standards and European classification

In the field of fire resistance, two main parameters are considered: combustibility and flammability.

Combustibility is the amount of heat released during the total combustion of a material.

Flammability is the amount of flammable gas emitted by the material.

In the field of fire safety, two main concepts are distinguished: “reaction to fire” and “resistance to fire”.

European standards define and regulate these characteristics precisely:

“Reaction to fire” represents the material as a potential fuel (combustibility, flammability) and is defined by the M rating.

Different materials (concrete, wood, paper, etc.) behave differently as fuels for the flame (test according to standard NF P 92-507).

Five levels of reactivity are established, from non-flammable material (M0) to the most easily flammable (M4).

Fire resistance refers to the duration during which a material can retain its physical and mechanical properties during ignition or exposure to fire.

The classification of our M1 varnish is established by a specialised test laboratory and gives rise to a fire classification report.

In practice, a material classified M4 will ignite very quickly and promote the rapid spread of flames.

Conversely, a material classified M0 can hardly ignite and cannot spread flames.

How long does M1 varnish last for fire resistance?

The M or Euroclass classifications concern the fire reaction (flammability, smoke, etc.)
These are standards that concern cases of fire outbreaks.
While the many fire resistance classifications (durability, integrity, sealing, insulation, etc.) are something different, there are many standards applied to each material. EN1363 is the classic standard.
The fire resistance of materials is classified with the codes ei 30, ei60 (sealed insulation + time in minutes)

These are standards that concern fires in progress
and the tests are done above 1000° for long periods.
This never concerns paints and varnishes.

Of course our M class or Euroclass varnishes can be integrated into a fire-resistant system (for example fire doors)

TEST
Brief description :
Date: 07/11/2022 validity 5 years
Substrate: Fiber cement 6mm 1800 kg/m3 representative of any non-insulating M0 support
Type of test: NF P 92-501 - Radiation test
Test report reference:
Minutes No. DO-22-4281A-R1
Company: CREPIM

The M1 classification corresponds to the fire protection standard valid in Europe

What is the M1 class fire classification?

M1: Combustible (non-flammable)

M2: Combustible (fireproof)

M3: Combustible (moderately flammable)

M4: Combustible (highly flammable)

REMINDER of European standard EN 13 501-1:

M0 = A1; A2 s1 d0 Euroclass: Non-combustible

M1 = B s3 d1 Euroclass: Non-flammable (excluding flooring)

M2 = C s3 d1 Euroclass: Fireproof

M3 = D s1 d0 Euroclass: Moderately flammable

M4 = D s3 (d1) Euroclass: Highly flammable