Working with Ecomortar Premixed Mortar TM
Construction, restoration, refurbishment and repair mortars

From the range of St Astier Natural Hydraulic Limes (NHL) and mortars

EcoMortar TM is a premixed product designed to provide all the benefits of traditional lime mortars in all sectors of today’s building industry.

EcoMortar TM contains a natural water retainer and air entrainer to improve the curing process, reduce the effects of moisture loss and aid workability. Because EcoMortar TM is made with properly graded sands it further reduces the need for contractors and speficiers to check local sands and aggregates for compliance. Well graded sands such as those used in EcoMortar TM reduce shrinkage, improve vapour transfer and workability.

The range of colours available is vast and pigmentation is finely controlled to an extent that will guarantee the same colour in successive batches. The dispersion of the pigments is very high to ensure that no colour streaks will appear. The use of a pre-coloured material eliminates the need for painting.

EcoMortar TM offers the discerning builder extremely high vapour permeability ensuring that no moisture will be retained in the built structure. It also has a superior elasticity than cementicious products and greater natural workability. EcoMortar TM can be worked for longer period than cementicious mixes and has the qualities of lime finishes, warm and aesthetically very pleasing with colour tones and effects similar to lime washes but far more durable. Its main eco friendly characteristics are:

Mechanical properties ensure:

The range includes products (the R series) that allow cost effective interventions on a multitude of backgrounds including where different construction elements are present and other difficult backgrounds where normally lime mortars would be unsuitable.

In the waterproofed products, this is achieved by incorporating a naturally occurring component which furs the voids, impeding water penetration but allowing breathability. With EcoMortar TM WP a 5mm coat is sufficient to achieve the required effect.

The EcoMortar TM range based on St. Astier NHL3.5 and NHL 2 comprises the following mortars:
C – Construction mortars F – Finishing mortars WP – Highly waterproofed.

Type C and F with NHL 3.5 Type C & F with NHL 2 Type WP
Normal backgrounds/masonry units in high and moderate exposure areas Weaker surfaces/masonry units in low exposure areas. Building mortar for lightweight blocks (>3.9N) Used wherever waterproofing is deemed necessary as finishing coat in renders and pointing.
EcoMortar TM is available in different granulometries. The maximum gain sizes are:
0.6 mm 0.8 mm 1.3 mm 1.8 mm 2.5 mm
R Series only All All All excluding WP series ALL excluding WP and R series

This range of granulometries allows all different kind of work, from ashlar work (2-3mm joints) to larger building and joint work. Similarly, renders and plasters can be built up to achieve all types of finishes.

EcoMortar TM R Series

In use in France over the last decade, the EcoMortar TM R Series presents great range of cost effective and easy solutions when working with difficult backgrounds and in the repair or refurbishment of existing renders/plasters and ornamental features. With the R Series the builder has the possibility of going over surfaces that normally require a multitude of coats or treatments. It also allows an aesthetically pleasing finish with a coloured EcoMortar TM R or a mineral paint finish, adding waterproofing properties and obtaining the required texture. The R Series mortar contains a natural resin that ensures great bond characteristics without impeding breathability. Combined with the absence of shrinkage this means that the R Series mortars are eminently suitable to be used also in low strength solid backgrounds.

In external uses, the R Series mortars require a waterproofed coating with either EcoMortar TM WP or a suitable, breathable, mineral paint.

The R series mortars offer:

Suitable backgrounds:

R100 : Painted backgrounds (subject to paint being sound and well bonded), smooth concrete/cast concrete (free of demoulding oils), waterproofed surfaces, tiles, metal components (rust treated).

R 50: all other backgrounds, including plasterboards, timber elements, bricks, stones, construction blocks, non waterproofed cement surfaces, gypsum plasters. On internal insulation panels, MDF, plywood, the application is permitted. Externally it is important that the insulation panels or other materials are not affected by humidity (dew point forming within the panel) causing in time a deformation of the panel and consequent movement. Please check with the manufacturers of the panels.

All EcomortarTM mortars can be applied manually or with a hopper spray gun. On special order, machine sprayable mortars can be supplied.

Ecomortar products carry a 10 years Guarantee for manufacturing defects.

Technical queries can be addressed to your St. Astier Distributor or to the Technical Enquiry Service

See also:  Ecomortar TM Data Sheet Ecomortar TM R Series data sheet Protecting Lime Mortars

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