Cementitious Adhesive for Natural & Artificial Stone
A powder grey adhesive for natural and artificial stone. It has a base of special binders combined with selected aggregates of a suitable granulometric size and special additives. ARREDO COLLA has a rapid setting and hydration time which prevent vertical slipping, it is a single component and therefore easy to apply by simply adding water.
Packaging:
ARREDO COLLA is supplied in 25kg bags.
Consumption:
From 4 - 8 Kg / m² according to the type of support and stone.
Storage:
Store in dry covered place in the original closed bags
Shelf life:
12 months if stored as recommended.
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Surface preparation
All surfaces should be sound, clean & uncontaminated. This preparation should leave an exposed concrete surface free from dust, loose particles, deleterious matter, oil, grease, chemical films & other contaminant.
All loose particles of mortar, paint, etc. must be physically removed.
Concrete or block work: should be allowed to cure sufficiently so that all shrinkage movements take place before fixing tiles.
Gypsum supports: must be treated with PRIMER A16. Should not have a percentage of humidity more than 10%.
The surface of substrates must be moistened slightly with clean water to reduce the absorption of water from the mortar. Do not moistened the tiles.
Mixing
Add ARREDO COLLA bag of 25 Kg. into a container of 5 to 5.25 Lt. of clean water, mix until a uniform, lump free consistency mix is achieved. For mixing process, a slow speed drill (200-300 rpm) fitted with a suitable paddle is recommended.
Keep the obtained mix from 3 to 5 minutes and then remix before application.
Application
Spread ARREDO COLLA on the substrate to a uniform thickness using a toothed spatula, the first pass with its straight edge and the second pass immediately after, to the desired thickness using the toothed part.
Place the tiles onto the adhesive bed. Apply sufficient pressure on the tile during fixing it with slight twisting movement in order to ensure good contact with the adhesive.
In case of large size tiles, it is necessary to spread the adhesive also to the backside of the tile and then place the tiles into the adhesive bed.
Apply enough material that can be tiled during the adhesive's open wet time. Spreading large areas may result in drying the adhesive before tiles can be fixed causing poor adhesion.
Finishing
Remove excess adhesive with damp cloth before the material has set. Joint grouting between tiles may be commenced after hours.
Cleaning
Tools and equipment should be cleaned with water immediately after use. Hardened materials should be mechanically removed.
Recommendations
ARREDO COLLA is a cement-based product. During application, wear appropriate protective clothing, goggles, gloves and respiratory equipment if necessary.
In case of contact with skin, rinse with water and again wash thoroughly with soap and water. In case of contact with eyes, rinse with plenty of water and seek medical advice accordingly.
If ingested, obtain medical attention immediately. Do not induce vomiting.
The information in this Technical Data Sheet is based on Colmef Monneli’s experience. Colmef Monneli does not accept any liability arising from the use of its products as it has no direct or continuous control over where or how its products are applied. All Colmef Monneli’s Data Sheets are updates on regular basis. It is the user’s responsibility to obtain the latest version.
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