Sikalastic® -590 | Roof Waterproofing (20kg)
Brand : Sika
Product Type : Economical liquid applied roof waterproofing with improved ponding water capability
Size : 20 Litres
Colour : Grey and White
Composition : Polyurethane modified acrylic dispersion
Density : ~1.32 kg/L (at +30 °C)
Solid Content : ~63 % by weight
Product Description:
Sikalastic®-590 is one component polyurethane – acrylic dispersion with improved water ponding resistance, excellent UV resistance, good crack bridging capacity and great esthetics. For manual / spray application, Sikalastic®-590 can be applied as coating or a reinforced liquid applied membrane with Sika® Reemat Premium-120.
Usage:
- For waterproofing solutions in both new construction and refurbishment projects
- For roofs with many details and complex geometry when accessibility is limited
- For cost efficient life cycle extension of failing roofs
- For reflective coating to enhance energy efficiency by reducing cooling costs (Sikalastic®-590 White)
Features / Advantages:
- Good behavior under limited water ponding
- UV resistant and resistant to yellowing and weathering
- Highly elastic and crack-bridging
- Non-toxic and VOC compliant water based coating
- One component - ready to use
- Excellent adhesion on porous and non-porous substrates
- Seamless waterproofing membrane
- Water vapour permeable
Shelf Life:
12 months from date of production if stored properly in original, unopened and undamaged sealed packaging.
Storage Conditions:
The product must be stored properly in dry conditions at temperatures between +5 °C and +30 °C.
Application Guide:
- Substrate Temperature : +15 °C min. / +35 °C max.
- Substrate Moisture Content : < 6 % moisture content.
Application Steps:
Step 1 : Substrate Preparation
Cementitious Substrate:
New concrete should be cured for at least 28 days and should have a Pull off strength ≥ 1.5 N/mm².
Remove cement laitance to prepare cementitious or mineral based substrates to achieve an open textured surface.
Loose friable material and weak concrete must be completely removed and surface defects (blowholes, voids) must be fully exposed.
Ensure substrate is fully repaired.
Prime the substrate and always use a reinforced system.
Brick and Stone:
Mortar joints must be sound and preferably flush pointed.
Use localized reinforcement over joints and prime before applying Sikalastic® -590.
Slates, Tiles, etc:
Ensure that bituminous felt is firmly adhered or mechanically fixed to the substrate.
Bituminous felt should not contain any badly degraded areas.
Prime and always use a totally reinforced system.
Metals:
Metals should be in sound condition.
Abrade the exposed surfaces to reveal bright metal.
Use locally reinforcement over joints and fixings.
Wooden Substrates:
Timber and timber based panel roof decks are to be in good condition, firmly adhered, or mechanically fixed.
Paints / Coatings:
Ensure the existing material is sound and firmly adhered.
Remove any oxidized layers and use localized reinforcement over joints.
Step 2 : Mixing
Prior to application, stir Sikalastic®-590 thoroughly for 1 minute in order to achieve a homogenous mixture.
Over mixing myst be avoided to minimise air entrainment.
Step 3 : Applicaiton
Prior to application, ensure substrate is primed and is tack-free.
The primer coat is Sikalastic 590 diluted 10% water and consumption is ~0.3 kg/m²
