mercor tecresa® » Tecplaster® Mortar » Tecplaster® – Steelwork Protection

Tecplaster® Mortar - Constructive Solutions

Tecplaster® Mortar - Steelwork Protection

Steel structures are a construction system used worldwide.

One of the main advantages is that they have great resistance per weight unit, which provides them with tremendous versatility and the possibility of creating complex yet light structures.

By contrast, one of the drawbacks of steel is its high thermal conductivity. Therefore, in the event of a fire, the progressive increase in temperature plus steel high heat transmission result in a reduction of the structure’s bearing capacity and mechanical resistance. The resistance and elastic limit are modified after 250 °C, and after approximately 500 °C the drop in resistance is
signifi cant enough so as not to support its design capacity.

To avoid this, mercor tecresa® introduces Tecplaster® mortar, tested pursuant to standard UNE EN 13501-2:2016, to determine the mortar fire protection properties when applied to steel structural elements: beams, pillars or tension members.

Tecplaster® has been designed and tested to cover a great variety of steel profiles characterised by their section factors. Likewise, it is tested for several design temperatures specified in the standard.


Standard: UNE ENV 13381-4
Laboratory: FIRES s.r.o.
Test Nº: CR-016-17-AUPE


1. Steel profile.

2. Tecplaster® (thickness according to the profile’s section and fire resistance time required).


Tecplaster® is usually applied by means of a mortar projection machine with a wet screw pump. For manual application, it is advisable to first fit a deployee steel mesh properly attached to the surface to be coated.

Preparing Tecplaster® Mortar: Add water to the mortar at a proportion of 1 kg of dry mortar to 1 litre of water.

The ratio between water and Tecplaster® Mortar determines the required consistency.

Surface preparation: Surface must be free of grease, dust and loose debris.
Metal surfaces must be primed and concrete surfaces should not contain any remains of stripping agent.

Tecplaster® Mortar usually has a rough finish from spray projection. In special cases, it can be smoothened. It can be painted with topcoat.

Tecplaster® Mortar is applicable indoors between 5°C and 40°C, provided relative humidity is not too high in the environment.

Tecplaster® should be stored on flat surfaces, never outdoors, and the material covered from sunlight and moisture.

Product document

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Steelwork Protection (columns & beams) with:


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