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GECO LIME scratch
NATURAL HYDRAULIC LIME-BASED BONDING MORTAR
GECO LIME scratch is the bonding mortar (scratch coat) of the GECO line, based on NHL 5 natural hydraulic lime and classified as a rehabilitation mortar (EN 998-1 R). It creates a rough, breathable base layer that anchors the dehumidifying plaster to damp and historic walls.
It is applied with a trowel, without smoothing, at 1-5 mm, leaving a textured surface that improves the adhesion of the following layers. Waterproof and breathable, it is the first line of defence against rising damp and helps slow down salt efflorescence.
NOTE
- Rough base for strong adhesion
- Waterproof and breathable
- NHL 5 natural hydraulic lime
- Controlled shrinkage
- Grey/beige powder; maximum particle size 0.5 mm.
- Compressive strength: CS II; dry density: 1600 ± 50 kg/m³.
- Adhesion on terracotta: 0.50 MPa, failure pattern B (substrate).
- Capillary water absorption: > 0.3 kg/m² after 24 h; capillary rise: < 5 mm.
- Water vapour permeability μ: 11; thermal conductivity: < 0.25 W/mK.
- Reaction to fire: A1 (non-combustible).
- Thickness per coat: 1-5 mm; yield: 1.5 kg/m² per mm; fresh density: 1650 ± 50 g/dm³.
- Mixing water: 5.0-5.5 L per bag; open time: 20 minutes; application between +5 °C and +35 °C.
- 25 kg bags; pallet of 60 bags; shelf life 12 months in a dry place.
PACKAGING
- Bonding layer in dehumidification cycles against rising damp.
- Rehabilitation cycles with plasters; helps slow down salt efflorescence.
- Before GECO LIME plaster on weak, porous or highly absorbent substrates.
- Walls with salts: treat with GECO ANTISALT first.
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