Sikalastic® - 1 KMY | Fiber Reinforced Flexible Waterproofing (12KG & 20KG)
Brand : Sika
Product Type : One component fiber reinforced, flexible cementitious waterproofing compound
Size :
- 12kg (3 x 4kg/pail) or (2 x 6kg/tin)
- 20kg
Color : Grey Powder
Composition : Cement modified with polymers, selected aggregates, admixtures, additives and fibers.
Fresh Mortar Density : ~1.5 kg/l (at + 25 °C)
Product Description:
Sikalastic-1KMY is a one component, flexible, fiber-reinforced mortar, based on cement modified with special alkali-resistant polymers. It also contains fine fillers, selected graded aggregates, plus special waterproofing additives to produce a flexible mortar that is ideal for waterproofing surfaces subject to flexural strain.
Usage:
- Waterproof protection of concrete structures including tanks, basins, pipes, swimming pools
- Waterproofing external wall surfaces to be backfilled in the ground
- Internal waterproofing of walls and floors, in basements, etc
- Waterproofing of terraces and balconies over concrete or prepared existing tiles
- General waterproofing of concrete surfaces
- Compatible with SikaCeram® series, tilling system
Features / Advantages:
- Easy to apply by brush, roller or trowel
- Can be applied on damp substrate
- Good sag resistance and easy to apply on vertical surfaces
- Flexible crack-bridging properties
- Very good adhesion to most common substrates (concrete, cementitious mortar, stone, bricks, ceramic and timber)
- Mixing ratio can be adjusted in order to obtain the consistency and workability
Shelf Life:
6 months from date of production
Storage Conditions:
Store properly in dry conditions, in undamaged and unopened, original sealed packaging. Protect from direct sunlight, rain and water. Not sensitive to frost.
Technical Information:
Tensile Strength : ~2.0 N/mm²
Crack Bridging Ability :
> 0.50 mm (Class A 3, +23 °C) | (EN 1062-7)
≥ 0.75 mm (+23 °C) | (EN 14891 A.8.2)
Tensile Adhesion Strength (on concrete, 28 days) :
Dry substrate : 1.3–1.5 N/mm²
Application Guide:
Mixing Ratio :
Application by roller : ~0.35 L of water per 1 kg
Application by brush : ~0.3 L of water per 1 kg
Application by trowel : ~0.22 L of water per 1 kg
Substrate Temperature : +5 °C (min.) / +40 °C (max.)
Pot Life : ~30 minutes (at +23 °C)
Waiting Time / Overcoating (at 20°C) :
Horizontal coving by tiles : ~2 days
Vertical covering by tiles : ~2 days
Water emulsion coating : ~ 2 days
Immersion in water : ~2 days
Contact with drinkable water : ~15 days
(Time varies due to ambient and substrate humidity)
Consumption (depends on substrate roughness):
Minimum 2 coats for all substrates
Regular areas~1.0 kg/m²/mm
Wet areas (toilets, balconies): 2.0 kg/m²
Critical areas (swimming pools, ponds): 3.0 kg/m²
Application Steps:
Step 1 : Mixing
- Mix mechanically and slowly by adding Sikalastic 1KMY into water (refer mixing ratio).
- Once a homogeneous mix is reached, continue to mix for 3-4 minutes more.
- The mortar must be completely homogeneous and free from lumps.
- Do not add any other additives.
- Mix the whole bag to avoid inadequacy.
Step 2 : Application
Trowel
- Apply with even pressure for uniform thickness
- Trowel in 2 directions (right angles)
- Max. 2 mm per coat
- Recommended: ≥ 2 coats (total 3–4 mm) for best waterproofing
Brush / Roller
- Ensure full, even surface coverage
- Apply in 2 directions (right angles)
- Max. 1 mm per coat
- Apply min. 2–3 coats
Step 3 : Curing Treatment
Generally not required but precautions should be taken for applications done directly under sunlight and windy condition.
Step 4 : Cleaning of Tools
- Clean all tools and application equipment with water immediately after use.
- Hardened material can only be removed mechanically.
