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Grupo Cementos Portland ValderrivasGrupo Cementos Portland Valderrivas

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  1. Mortar - Bagged mortar - Products and recommendations - Spray mortar - Valsec Lanaroc

Mortar - Bagged mortar - Products and recommendations - Spray mortar - Valsec Lanaroc

Product range: Spray mortars

Valsec Lanaroc

Adhesive mortar for applying rock wool.

Water-resistant adhesive mortar for applying rock wool. Formulated to be rainproof, permeable to water vapour and with a long open time.

Scope of application

For attaching rockwool or fibreglass wool to brick or concrete block substrates. Outdoor and indoor use.

Supply conditions

25 kg bags protected by plastic sheet.



Mixing instructions

Mix with approximately 24% water using a slow electric mixer, or in a spray gun.

Substrate preparation

Substrates must fulfil the following conditions:

  • They must be strong, clean and stable.
  • Do not use on water-repellent substrates or on substrates with plaster, paint or plastic coating.
  • The substrate should not be excessively dry or waterlogged. In warm weather, dampen the surface before application.
Instructions for application

Apply using spray gun or manually. Complete cover the substrate with mortar to ensure proper waterproofing and thermal/acoustic insulation. Level with a ruler to obtain a depth of 3-5 mm. Apply the panels with pressure, ensuring that mortar is still fresh so that the wool penetrates into the mortar.


Mortar made from cement, graded aggregate, and organic and inorganic admixtures.

Type GP (UNE EN 998-1)
Granulometry (max.) 1 mm Water proportion 24% ± 1%
Working time Approximately 90 minutes Apparent density 1,6 ± 0,1 kg/m3
Water absorption by capillarity (UNE EN 1015-18) ≤ 0,4 kg/m2 min1/2 Working temperature +5ºC a 35ºC
Water vapour permeability (UNE EN 1015-19) µ ≤ 16 Application thickness 3-5 mm
Compressive strength (UNE EN 1015-11) ≥ 4 Mpa Approximate yield 7-9 kg/m2
Adhesion (UNE-EN 1015-12) ≥ 0,5 Mpa Fire resistance A1

VALSEC LANAROC fulfils all the obligatory quality standards under UNE EN 998-1.

VALSEC mortars are produced in industrial dry mortar plants with quality assurance systems certified by AENOR in accordance with the UNE EN ISO 9001:2000 standard.

The data is based on trials performed in our control laboratory and is the result of extensive experience with the products made by the Cementos Portland Valderrivas Group. Variations in working conditions on site may lead to changes in performance.


Store in a dry place, protected from frost and direct sunlight. If properly stored, the product may be used up to 12 months after manufacture.


This product contains cement. Avoid contact with eyes and skin, and do not inhale the dust. Use rubber gloves and goggles when handling. Keep out of reach of children.

Note: Cementos Portland Valderrivas is not responsible for inappropriate use of the product or for unexpected outcomes arising from its usage, since the application conditions and methods are beyond our control. The customer is responsible for ensuring correct use of the product.

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