Here at Redwood, we are often asked by our customers about the latest fire safety regulations and which of our Hesse products meet the most recent reaction to fire European Standard.  With this in mind, we’ve provided a summary of the European Standard EN 13501-1: Reaction to Fire regulations and a full list of EN 13501-1 certified Hesse products:

EN 13501-1 Reaction to Fire explained

The European standard EN 13501-1: Reaction to Fire provides a number of performance criteria to measure the fire characteristics of materials. The EN‐standard is based on a test for the actual materials response to fire, smoke development and droplets while burning – however, it should be noted that this test does NOT cover fire resistance – this comes under BS EN 13501-2.

All materials tested under EN 13501-1: Reaction to Fire regulations also have a letter classification, from A1 to F, to further explain their reaction to fire:

Class A1 – non-combustible materials

Class A2 – non-combustible materials

Class B – combustible materials – very limited contribution to fire

Class C – combustible materials – limited contribution to fire

Class D – combustible materials – medium contribution to fire

Class E – combustible materials – highly contribution to fire

Class F – combustible materials – easily flammable

As well as this, all materials classified A2, B, C, D obtain an additional classification regarding the emission of smoke and the production of flaming droplets and/or particles:

Smoke development:

Class S1 -very limited smoke development

Class S2 –limited smoke development

ClassS3 – no demands on smoke development

Burning droplets:

Class d0 – no burning droplets or particles

Class d1– limited burning droplets

Class d2 – no demands on burning droplets


Which Hesse products are EN 13501-1 certified?

It’s important to note that fire-retardant coatings do NOT make a material fire-retardant; rather they provide a protective layer which helps professionals maintain the existing fire-retardant properties of the surface material.

All of the Hesse FANTASTIC range products meet EN 13501-1 testing standards (highest rating B-s1, d0), which compromises of three products:

FANTASTIC-FILL – a polyurethane isolation primer with excellent body and remarkable surface smoothness

FANTASTIC-COLOR a light fast and very well-balanced two-component colour lacquer

FANTASTIC-CLEAR – a transparent multicoat lacquer, perfect for finishing on veneered chipboard.

In addition, the following Hesse products also meet this standard:

  • Hesse HDE 5400 x Hydro PU Primo Clear – a two-component HYDRO-PU Acrylate multicoat lacquer, which is also is certified to IMO (flame retardant coating for seagoing vessels) and has an extremely low VOC content (5.75%).
  • Hesse HP 6645-9343 Hydro Filler Primer – a one part isolation primer formulated to be thixotropic and have good body. This is also certified under ‘Dubai Green Building’
  • Hesse HB 6528x Hydro Pro Colour – a one part colour lacquer for priming and top coating, which has good scratch resistance and durability and has an extremely low VOC content (<3%)
  • Hesse DB42105 Glass Lacquer – a pigmented, light fast two-component polyurethane acrylic resin lacquer for glass with very good chemical and mechanical resistance

To find out more about Hesse Lignal’s EN 13501-1 certified products, or if you’d like to know more about the latest fire-retardance regulations, contact Redwood Innovations today on 02392 233310 or sales@redwoodinnovations.co.uk to speak to one of our technical consultants.

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