Mortars: adhesive, leveling, repair, and rendering
A mortar is a mixture of binder, aggregate, and additives formulated for a specific function. Using the wrong one is the usual cause of tiles coming loose and repairs cracking after a few months. Here you will find adhesive mortars, self-leveling mortars, repair mortars, single-coat renders, and gripping mortars.
Which mortar for each job
| Type | Purpose | Typical thickness |
|---|---|---|
| Adhesive mortar | Laying ceramic, porcelain, stone | 3–10 mm depending on piece |
| Self-leveling | Leveling screed before flooring | 3–10 mm |
| Repair | Damaged concrete, edges, exposed rebar | Up to 30–50 mm per coat |
| Single-coat render | Rendering facade in a single application | 10–15 mm |
Understanding the bag's acronyms (C2 TE S1 and others)
Cementitious adhesives are classified according to standard UNE-EN 12004. Those letters on the bag are not marketing; they define performance measured in tests.
- ✓ C1 / C2: normal or improved adhesion. For porcelain and outdoors, C2.
- ✓ T: reduced slip. The piece does not fall when tiling from top to bottom.
- ✓ E: extended open time. Useful in summer or large surfaces.
- ✓ S1 / S2: deformability. Mandatory for underfloor heating, wood, or moving substrates.
- ✓ Practical rule: large format porcelain stoneware for outdoor use requires at least C2 TE S1.
Mixing and application
- 1 → Respect the mixing water specified on the bag. Adding too much water drastically reduces final strength.
- 2 → Mix, let stand for a few minutes, and mix again. This resting period activates the additives.
- 3 → Never re-mix by adding water when it starts to harden. That material is no longer usable.
- 4 → For ceramics, check the open time: if the adhesive has formed a skin, it won't bond. Remove and replace.
- 5 → For outdoor and large format, apply back-buttering (trowel on substrate and on piece) to fill 100% of the back.
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-23%BeissierBeissier BMA 4502 Smoothing Mortar — Concrete and Mineral Surface Repair and Leveling
BMA 4502 Beissier Smoothing Mortar is Beissier's high-quality mortar for the non-structural repair, leveling, and renovation of concrete surfaces and...
97.86 € 127.22 €97.86 €97.86 € 127.22 €In stock, ready for dispatch -
-23%KERAKOLLKerakoll Geolite 10 Structural R4 Geobinder 25 kg — Sets in 10 minutes, repairs reinforced concrete, and passivates rebar
Repair the concrete and return the scaffolding on the same day Kerakoll Geolite 10 is a thixotropic mineral geomortar made...
36.99 € 48.40 €36.99 €36.99 € 48.40 €In stock, ready for dispatch -
Sold out -10%ARDEXARDEX K14 — High Quality Self-Leveling Underlayment EC1 Radiant Heat Floors
ARDEX K14 is Ardex’s high-quality self-leveling mortar — designed for precise floor leveling before the installation of any floor covering....
40.50 € 45.00 €40.50 €40.50 € 45.00 € -
-22%BeissierMultiflex Beissier Flexible Tile Adhesive — Adhesive for Porcelain and Large Format Tiles
Beissier Multiflex Flexible Tile Adhesive is Beissier's mixed binder and hydraulic hardening tile adhesive for installing porcelain stoneware, large formats,...
48.39 € 62.18 €48.39 €48.39 € 62.18 €In stock, ready for dispatch -
BeissierBMB 18015 Beissier Base Mortar-Screed — Exterior Facade and Wall Regularization
BMB 18015 Beissier Base-Leveling Mortar is a dry cement, lime, and synthetic resin mortar classified as GP CS IV for...
0.00 €0.00 €0.00 €In stock, ready for dispatch -
-23%StockpinturasDry Mortar Alber Cover 1kg
2.94 € 3.82 €2.94 €2.94 € 3.82 €In stock, ready for dispatch -
-19%StockpinturasBlatem Umbrella Kit
APPEARANCE Milky liquid. COLOR Colorless. DENSITY 1 ± 0.1 g/ml (UNE-EN-ISO 2811-1 and 2).VISCOSITY 90 ± 10 KU (Krebs units)...
From 77.26 € 96.57 €77.26 €77.26 € 96.57 €In stock, ready for dispatch -
-24%StockpinturasAlber Ceramic Covering
Alber Ceramic Cover DESCRIPTION: It is a mixture of various micronized powder components, intended for plastering over ceramic, provided it...
43.96 € 58.61 €43.96 €43.96 € 58.61 €In stock, ready for dispatch
