Sika Sikalastic 591
Sika Sikalastic 591
📋 Product specifications are for reference only.
All product details should refer to the official manufacturer documents. For official product data sheets or technical enquiries, please contact us via WhatsApp.
Sikalastic-590 is a single-component water-based liquid roof waterproofing membrane based on polyurethane-modified acrylic dispersion with improved short-term ponding water resistance. Ready to use from the pail, no hot works required, with high elasticity, excellent UV and yellowing resistance. Suitable for roof waterproofing (new build and refurbishment). White version provides high solar reflectance to reduce cooling loads.
Sikalastic-590 — Improved Ponding Resistance Liquid Roof Membrane
Sikalastic-590 is a single-component water-based liquid waterproofing membrane based on polyurethane-modified acrylic dispersion with improved short-term ponding water capability. Ready to use, applicable by hand or spray, and can be reinforced with fabric for enhanced membrane systems. Offers excellent UV resistance and yellowing stability for exposed roof applications.
Features
- Improved short-term ponding water resistance
- High elasticity with excellent crack bridging ability
- UV resistant, non-yellowing
- White version provides high solar reflectance, reducing cooling loads
- Single-component water-based, ready to use from pail
- No hot works required
- Hand or spray application
- Can be reinforced with fabric for enhanced systems
- Passes accelerated weathering tests
Applications
- Roof waterproofing (new construction)
- Roof refurbishment waterproofing
- Flat and sloped roof exposed waterproofing
- Roof details (edges, outlets, pipe penetrations)
Why Choose Sikalastic 591?
- Improved ponding resistance: Better short-term ponding water tolerance than standard acrylic membranes
- High elasticity: Excellent elongation and crack bridging performance, accommodates structural movement
- UV resistant: Passes extended accelerated weathering tests, suitable for long-term exposure
- Safe and convenient: Water-based formula, no hot works, easy and safe application
- Energy saving: White version high reflectance effectively reduces roof temperature and cooling energy consumption
Packaging
Pail supply, contact for specific sizes.
Notes
- Substrate must be clean, sound, and free of oil
- Do not apply in rain or wet conditions
- Apply in multiple thin coats
- Allow full drying before foot traffic
- Not suitable for permanent immersion
- Store in cool dry conditions, protect from frost
For detailed application methods, coverage rates and technical parameters, please refer to the official product data sheet.
