Sikalastic-110 20Kg | High elasticity, one part polyurethane bituminous waterproofing coating
Product Category: Waterproofing Coating
Brand: Sika
Model Code: Sikalastic®-110
Description
Sikalastic®-110 is a 1-component water-based polyurethane-bituminous waterproofing coating, designed to form a highly elastic, seamless, and crack-bridging membrane. It is suitable for applications requiring flexibility and durability under movement conditions.
Applications
Concealed reinforced concrete (RC) flat roofs
External walls below ground (buried structures)
Waterproofing under tiles (balconies, podiums, terraces)
Structures exposed to movement or vibration
Key Features
High elasticity and flexibility
Excellent crack-bridging ability
Seamless waterproof membrane
Strong adhesion to concrete
Can be applied on damp surfaces
Easy application (roller, brush, spray)
Non-toxic, low VOC, eco-friendly
Product Information
Type: Polyurethane-bituminous waterproof coating
Composition: Hybrid PU-bitumen
Packaging: 20 kg pail
Colour: Black
Shelf Life: 12 months
Storage: +5°C to +30°C, dry, avoid sunlight
Density: ~1.08 kg/L
Technical Data
Tensile Strength: ~1.5 N/mm²
Elongation at Break: ~1000%
Application Conditions
Temperature: +5°C to +40°C
Humidity: Max 80%
Substrate moisture: < 6%
Must be ≥3°C above dew point
Curing & Timing
Full cure: ~48 hours
Primer drying: 30–60 minutes
Between coats: 4–8 hours
Ready for screed: after 48 hours
System Consumption
Standard Coating System
Layer
Consumption
Primer (diluted 1:1 water)
~0.2 kg/m²
First coat
~0.65 kg/m²
Second coat
~0.65 kg/m²
Reinforced System (Recommended)
Layer
Consumption
Primer
~0.2 kg/m²
First coat
~0.8 kg/m²
Reinforcement
Sika Reemat
Second coat
~0.5 kg/m²
Third coat
~0.5 kg/m²
Substrate Preparation
Concrete must be:
Minimum 28 days cured
Moisture < 6%
Clean, dry, and sound
Remove:
Dust, oil, grease
Loose materials
Old coatings
Application Method
Standard System
Dilute product (1:1 water) → primer
Apply primer and let dry
Apply 2 coats of Sikalastic®-110
Allow full cure (~48 hrs)
Apply screed or tile system
Reinforced System
Apply primer
Apply first coat
Embed reinforcement mesh (Reemat)
Apply 2 additional coats
Cure before finishing
Important Limitations
Do NOT use:
For water tanks or swimming pools
For permanent water immersion
On substrates with rising moisture
Under UV exposure (must be covered system)
Important Notes
Protect from rain before curing
Do not allow water ponding between coats
Do not add extra water (except primer stage)
Performance Advantages
High flexibility for moving structures
Excellent waterproofing performance
Crack bridging up to extreme elongation
Seamless membrane (no joints)
Suitable for tropical climate
Safety & Handling
Follow Safety Data Sheet (SDS)
Use proper PPE
Clean tools with water immediately
Additional Notes
Lab-tested performance values
Site conditions may affect results
Local regulations may vary
Summary
Sikalastic®-110 is a high-performance waterproofing coating designed for flexible, crack-resistant waterproof systems, ideal for roofs, balconies, and under-tile applications, delivering long-lasting protection and durability.