Malta Da Muratura Thermo

Allurement mortar with expanded glass

Premixed masonry mortar for the allurement of thermo-insulating masonries composed by hydraulic bonding agents, quality/granulometry selected mineral inerts and expanded glass.

Features excellent insulation skills and super-low thermal dispersion which guarantees the thermal standard parameters of masonries.



Fields of application

Reduces thermal bridges that would form with common masonry mortars, ensuring a better continuity of thermal insulation.

Suitable for application  in ordinary or buffer main walls, to glue thermo-insulating blocks, cement blocks with insulating inerts, expanded clay blocks, etc.

Support preparation

Carefully clean the support on which the blocks are going to be glued and make it as much as rough and absorbent as possible, in order to avoid adhesion limitations due to impurities. The elements to be allured must be fee from dust and dirt, oils and greases.

Masonries must be clean and consistent, free from failing parts, dust, mold or efflorescences. Remove any residues from previous works and inconsistent allurement mortar that may prevent adhesion.

Wet the masonry or the elements that must be allured and wait the superficial water to evaporate.

Mixture Preparation

Pour in a container the right amount of water to mix a bag of the product, gradually add the powder and mix with a low-rounds stirrer or in a cement mixer until an even, clump-free mixture is achieved. Let rest for 5 minutes, then stir briefly before usage.


Apply by trowel. Realize the allurement base with the masonry mortar, set the element to be allured by performing circular gestures to obtain the correct positioning. Excess mortar must be cut flush to the wall with a trowel.


Prepare the mixture with clean, not brackish water. Do not apply the product within an environment below +5°C or above +35°C, in high sunlight exposure hours, in risk of rain or windy days. Protect the plaster from rain, wind, sun or rapid exsiccation for 24-48 hours. In case of application during hot season make sure it has a constant exsiccation by using scaffoldings, windbreakers/sunshieldings. Do not add any other materials to the content of the bag. It is recommended to mix the entire content of one bag in one solution. Do not use as consolidating grout for “rubble” masonries.


Technical Data


flat trowel


kg 25

Mixing water

approx. 5 l per bag




approx. 10-12 kg/sqm per cm of thickness

Maximum diameter of aggregate

2 mm - EN 1015-1

Coefficient of permeability to water vapour µ

< 12 - EN 1015-19

Thermal conductivity

0,275 W/m K - tabulated value according to EN 1745

density of hardened mortar

0.98 kg/dm³ - EN 1015-10

Compressive strength

class M5 - EN 1015-11

Flexural strength

after 28 days > 1.5 N/mm²

Reaction to fire

Euroclass A1 - EN 13501-1



Workability time

approx. 60 min.

Application temperature

from +5°C to +35°C

Tools cleaning

water soon after use


60 bags of kg 25

Data contained in technical data sheets refer to laboratory tests. Indications and methods may be subject to change over time, depending on any technological and productive improvements. Products application takes place out of our control, as we cannot directly intervene on the conditions of the construction sites and on the execution of the works. All indications are general and do not bind our company in any way and therefore the responsibility falls exclusively on customer. We recommend a preventive test of the product in order to verify the suitability in relation to its particular use. Technical service is available to provide additional information.

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