Capatect Klebe- und Armierungsmasse 133 LEICHT

Lightweight mineral based dry mortar premix
as adhesive and reinforcing base coat within Capatect ETICS

LV Texte

Field of Application

Mineral lightweight dry mortar premix (CS II as per DIN EN 998-1) for fixing and  reinforcing insulation boards within Capatect ETICS, especially in combination with high-grade textured plaster Capatect Edelkratzputz K40 (spike-board brushed).
Reinforcing layer thickness: 5 to 10 mm.

ETICS = External Thermal Insulation Composite System
   Brit. term: EWI; Am. term: EIFS

Material Properties

  • Mineral bonded mortar for mechanical and manual application.
  • Tuned with additives for water repellency, easy application and good adhesion.
  • Reaction to fire as per EN 13501-1:2007: Class non-combustible (nichtbrennbar) or flame-retardant (schwerentflammbar) according to the configuration of the Capatect ETICS.
  • Weatherproof, water-repellent as per DIN 18550-1.
  • Highly water vapour permeable.
  • Extremely low shrinkage stress.
  • Withstands high mechanical stress.
  • Easy to mix and apply with machine equipment.
  • High green mortar stability.
  • Long open time.
  • Ecologically compatible.

Packaging/Package Size

25 kg Bag, 1000 kg Big Bag, 5000 kg Silo


Natural white


Dry, frost-free, protect from direct sunshine.
Containers & silos must be completely emptied before longer work breaks (e.g. during winter period).
Shelf life of original sealed containers: approx. 12 months.

Heat conductivity

0.27 W/(m•K)

Resistance-count for diffusion µ (H2O)

µ ≤ 10 as per DIN EN 998-1

Diffusion-equivalent air layer thickness sdH2O

Approx. 0.04 m as per DIN EN 998-1

Compression strength

Class CS II as per DIN EN 998-1

Apparent density of hardened mortar

Approx. 1.0 g/cm³ as per DIN EN 998-1

Fire behaviour

A2-s1, d0 as per DIN EN 13501

Vehicle / Binding agent

Mineral based binder as per DIN EN 197-1 and DIN EN 459-1

Capillary water absorption

Approx. 0.18 kg/(m2 · h0,5) as per DIN 52617

Product No.

Cover the scaffoldings with tarpaulins to protect the surface from rain during the drying phase, if necessary. Follow national or local regulations and specifications for applying mineral based mortars. In Germany: Follow  DIN 18550-1.

Substrate Preparation

Masonry, concrete and adherent paint coatings must be clean, dry and sound/stable. The substrate must be free of all material that may prevent good adhesion (e.g. formwork oil residues, impurities). Remove overhanging mortar burrs.

Remove unsound, peeling off paint coatings and textured renders as far as possible. Cut off openings in render/plaster coatings and replaster the area flush with the surface. Clean strongly absorbent, sanding or chalking surfaces thoroughly to the solid substrate and prime with concentrate Sylitol-Konzentrat 111.

Preparation of Material

Hand processing: Add the contents of a 25 kg bag of powder premix gradually into the required quantity of tap water - approx. 8 to 9 litres - and mix carefully with a low-speed electrical agitator until the mixture is free of lumps. Allow to stand and swell for approx. 5 minutes and stir up again. Adjust to working consistency with a small amount of tap water, if necessary. Working time for manually prepared material: Approx. 2 to 2  1/2 hours (pot life at 20 °C), depending on weather.

Machine application: For equipment see below. Maximum operating life for mechanical processing: 60 minutes.

Note: Do not dilute slightly hardened mortar. Such material is unusable.


Fixing Insulation Boards: 3.0 - 5.0 kg/mdepending on insulation board type and fixing method.
Reinforcing coat: Approx. 1.1 kg/m2 per mm of coat thickness.
These values are benchmarks and may vary according to substrate or application conditions.

Application Conditions

Processing temperature: +5 °C to + 30 °C during application and curing for material, substrate and ambient air.
Do not apply on sun heated substrates (direct sunlight), during strong wind, fog, rain, high relative humidity or imminent rain and frost.

Drying/Drying Time

Surface-dry after 24 hours at 20 °C and 65 % RH. Curing time per mm of coat thickness: 1 day. Capatect 133 dries by hydration and physically by evaporation of water. Lower temperatures and higher RH extend the drying process.

Tool Cleaning

Immediately after use with water.

Example for Machine Equipment

Follow the instructions of the machine manufacturer strictly!
General basic information:
Electricity supply for mixer and conveyor: 400 V rotary current /16 A
Water supply: 3/4" hose; minimum pressure 2.5 bar ; approx 330 litres/hour. The desired green mortar consistency can be set by the fine-regulating valve in the water-fitting of the mixer.
Hose pipe: First hoses (max. 3 units) - interior Ø 35 mm, 13.3 m each, end hose - interior Ø 25 mm, 10.0 m; total max. range approx 50 m. Lower values depending on temperature and building conditions (vertical / horizontal hose lines)
Spraying unit: Nozzle size Ø 10 mm

Note: Wet the hose pipe with lime slurry or wallpaper paste before daily regular operation.

Reinforcement Layer

Manual or machine application:
Attach first all preceding accessory parts (like diagonal reinforcement, edge protectors, drip edge profiles) with mortar to openings in the facade, reveals and corners etc. .

Apply the Capatect Klebe- und Armierungsmasse 133  in the width of reinforcing fabric sheets and embed Capatect Gewebe 650/110 (glass fabric; mesh size 4 x 4 mm)  or Capatect Gewebe 666/110 (glass fabric; mesh size 6 x 6 mm) with an overlap of min. 10 cm. Treat the surface wet-on-wet with reinforcement mortar to assure a complete coverage of the glass fabric. Apply the mortar always evenly in a layer thickness of min. 5 mm and max. 10 mm.

As reinforcement under a finishing render Capatect-Edelkratzputz K40 apply Capatect Klebe- und Armierungsmasse 133 in 8 mm layer thickness, then comb the still wet surface horizontally with a 6 mm notched trowel and allow to cure.
On mineral wool and hemp based insulation boards a pressure-priming is recommended as intermediate coat.

Optional depending on weather conditions and base coat absorbency: Prime the cured base coat with Sylitol-Konzentrat 111 (diluted 2 : 1 with tap water) before further processing.

Bonding of Insulation Boards

Apply freshly prepared mortar of Capatect Klebe- und Armierungsmasse 133 Leicht thoroughly to the reverse side of the thermal insulating board, by using the "Bulb-Point-Method":
A bulb of mortar, approx. 5 cm wide, surrounds the board and 3 blobs (palm of the hand sized) are to be applied in the middle of the board. Adjust the thickness of applied material (base height) to the tolerances of the substrate, such that ≥ 40% surface area is in contact with adhesive. Note: Prime bulb-point areas on mineral wool boards first with a grout coat of this mortar for better adhesion.

For rail mounting: Apply blobs of mortar on the reverse side of insulation board (> 20 % of the board surface) and stick board into the horizontal profile. For further processing see application manual.

Special Risks (Hazard Note) / Safety Advice (Status as at Date of Publication)

Causes skin irritation. Causes serious eye damage. May cause respiratory irritation. Do not breathe dust or mist. Keep out of reach of children. Wear protective gloves/ protective clothing/ eye protection/ face protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
IF SWALLOWED:  Rinse mouth. Do NOT induce vomiting.
The product ist highly alkaline. Hence protect skin and eyes from paint. The areas adjoining the surface to be coated must be carefully masked, in particular glass, ceramics, enamel/varnish coating, clinkers, natural stones, wood and metals. Wash splashes immediately and completely with plenty of clean water. Contains cement.


Empty containers should be taken to an approved waste handling site for recycling or disposal. Can be landfilled after concentration, when in compliance with local regulations.

European Waste Code (EWC) 17 09 04

Risk and Transportation Markings

See Material Safety Data Sheet (MSDS).




Aprovals and assessments


Z-33.41-130        Z-33.42-131       Z-33.43-132
Z-33.44-133        Z-33.46-1091     Z-33.47-859      
ETA-08/0304       ETA-09/0368      ETA-07/0184     ETA-10/0160
ETA-10/0436       ETA-11/0300      ETA-12/0383     ETA-12/0575

CE Labelling

CE Labelling as per DIN EN 998-1
See product label or

Customer Service Centre

Tel.: +49 6154 71-71710
Fax: +49 6154 71-71711

International Distribution: Please see