Sikalastic®-510 BH
Sikalastic®-510 BH is a cold-applied, one-component waterborne liquid applied waterproofing membrane, highly elastic and UV-resistant.
Suitable for use in hot climatic conditions.
- UV resistant and resistant to yellowing and weathering
- Highly elastic and crack-bridging
- One component - ready to use
- Excellent adhesion on porous and non-porous substrates
- Seamless, fully bonded waterproofing membrane
- Water vapour permeable
Usage
- For exposed roof waterproofing solutions in both new construction and refurbishment projects
- For exposed roofs with many details and complex geometry when accessibility is limited
- Waterproofing underneath screeds in wet rooms
- For reflective coating to enhance energy efficiency by reducing cooling costs
Advantages
- UV resistant and resistant to yellowing and weathering
- Highly elastic and crack-bridging
- One component - ready to use
- Excellent adhesion on porous and non-porous substrates
- Seamless, fully bonded waterproofing membrane
- Water vapour permeable
Packaging
20 kg plastic pails
Colour
White, liquid form
Product Details
Composition
Acrylic Dispersion
Shelf life
12 months minimum from date of production if stored properly in original, unopened and undamaged sealed packaging.
Storage conditions
Store in dry conditions in original packaging at temperatures between +5 °C and +30 °C. Protect from direct sunlight and frost.
Density
| ~1.24 kg/l | (ISO 2811) |
Solid content by mass
~55 %
Solid content by volume
~44 %
System structure
| Build up: | Sikalastic®-510 BH (applied in minimum of 2 coats) |
| Substrates: | Cementitious, brick, stone, metals |
| Primer: | Please refer to related chapter |
| Dry film thickness: | Minimum 0.35 mm, depending on application field, project specification and relevant standards |
| Total consumption: | Minimum 1.0 kg/m2, depending on application field and project specification |
Attention: Do not apply more than 0.8 kg/m2 Sikalastic®-510 BH per coat for layers without reinforcement.
Tensile strength
| Free film: ~1.8 N/mm2 (28 d / 23°C) | (ASTM D 638) |
Tensile adhesion strength
| ~1.8 N/mm2 (28 d / 23°C) | (ASTM C 1583) |
Water absorption
| Depth of penetration of water under pressure: ~3 mm (28 d / 23 °C) | (EN 12390-8) |
Service temperature
-5 °C min. / +80 °C max.
Application
Ambient air temperature
+8 °C min. / +40 °C max.
Relative air humidity
80 % max.
Substrate temperature
+8 °C min. / +40 °C max.
Dew point
Beware of condensation. Surface temperature during application must be at least +3 °C above dew point.
Substrate moisture content
< 6 % moisture content.
No rising moisture according to ASTM (Polyethylene-sheet). No water / moisture / condensation on the substrate.
Substrate pre-treatment
| Substrate | Primer | Consumption [kg/m2] |
| Cementitious substrates, brick, stone and metals | Sikalastic®-510 BH diluted with 10 % water. | ~0.3 |
These figures are theoretical and do not include for any additional material required due to surface porosity, surface profile, variations in level and wastage etc.
Waiting time to overcoating
Before applying Sikalastic®-510 BH on primer Sikalastic®-510 BH diluted with 10 % water:
| Substrate Temperature | Relative humidity | Minimum | Maximum1) |
| +10 °C | 50 % | ~4 h | 1 month |
| +20 °C | 50 % | ~2 h | 1 month |
| +30 °C | 50 % | ~1 h | 1 month |
Before applying the base coat of Sikalastic®-510 BH on the second coat of Sikalastic®-510 BH allow intermediate coats to fully cure
| Substrate Temperature | Relative humidity | Minimum | Maximum1) |
| +10 °C | 50 % | ~8 h | 3 months |
| +20 °C | 50 % | ~6 h | 3 months |
| +30 °C | 50 % | ~4 h | 3 months |
1) Assuming that all dirt has been removed and intercoat contamination is avoided.
Note: Times are approximate and will be affected by coating thickness and changing ambient conditions particularly temperature and relative humidity. Low temperature and high humidity retard curing, while high temperatures and low humidity accelerate curing progression. The above times are based on a coating thickness of 0.4 kg/m2.
Applied product ready for use
| Substrate Temperature | Relative humidity | Touch dry | Rain, water & condensation resistant | Full cure |
| +10 °C | 50 % | ~4 h | ~12 h | ~6 d |
| +20 °C | 50 % | ~2 h | ~8 h | ~4 d |
| +30 °C | 50 % | ~1 h | ~4 h | ~2 d |
Note: Times are approximate and will be affected by coating thickness and changing ambient conditions particularly temperature and relative humidity. Low temperature and high humidity retard curing, while high temperatures and low humidity accelerate curing progression. The above times are based on a coating thickness of 0.4 kg/m2.
SUBSTRATE PREPARATION
All substrates must be prepared using abrasive blast cleaning, scarifying equipment or other suitable mechanical methods and cleaned using high pressure water jet.
Cementitious substrates:
New concrete should be cured for at least 28 days and should have a pull-off strength ≥ 1.5 N/mm2. Loose friable material and weak concrete must be completely removed by mechanical means to achieve an open textured surface and all surface defects such as blowholes and voids must be fully exposed. Repairs to the substrate, filling of joints, blowholes/voids and surface leveling must be carried out using the appropriate Sika® products. Refer to Sika’s Technical Department for further advice. High spots must be removed by for example grinding. Outgassing is a naturally occurring phenomenon of concrete that can produce pinholes in subsequently applied coatings. The concrete must be carefully assessed for moisture content, air entrapment, and surface finish prior to any coating work. Installing the Sikalastic®-510 BH either when the concrete temperature is falling or stable can reduce outgassing. Prime the substrate before applying the Sikalastic®-510 BH systems.
Brick and stone:
Mortar joints must be sound and flush pointed. Use localised reinforcement over connection joints and prime before applying Sikalastic®-510 BH.
For other substrates please contact Sika Technical Department.
Metals:
Metals must be in a clean sound rust free condition.
Metals surfaces must be free of oil and greases.
Abrade exposed surfaces to reveal bright metal.
Use localised reinforcement over joints and fixings.
MIXING
Prior to application, stir Sikalastic®-510 BH thoroughly for 1 minute in order to achieve a homogeneous mixture using a slow speed (300 - 500 rpm) drill and basket type paint mixer. Over mixing must be avoided to minimise air entrainment.
APPLICATION
Prior to the application of Sikalastic®-510 BH the priming coat must have cured tack-free. Protect adjacent areas from splashes, over painting, damage etc. with an adhesive tape or plastic. Sikalastic®-510 BH is applied in 2 – 6 coats as per the required system thickness. Prior to the application of each coat the indicated waiting times must be followed.
Sikalastic® Flexitape Heavy or Sika® Reemat Premium is applied at areas having high movements, irregular substrate or to bridge cracks, joints and seams on the substrate. Please note, always begin with detailing works prior to waterproofing the horizontal surface.
Tools: High Pressure Jet Washer (minimum 150 bar): If dust, vegetation, moss / algae or other contaminants are present on the existing roof, a power washer is required to clean the substrate prior to the application of Sikalastic®-510 BH. Existing chippings should be removed by hand or scabbling prior to power washing. Squeegee: Useful when removing excess water from the roof after overnight rain. Drill and paddle: Sikalastic®-510 BH should be mixed for one minute using a slow speed (300-500 rpm) drill and basket type paint mixer. Solvent resistant short-piled roller: Used in the application of Sikalastic®-510 BH to ensure a consistent thickness of the seamless Sikalastic®-510 BH. Thick hair brush: For application of Sikalastic®-510 BH to all details and penetrations.
CLEANING OF EQUIPMENT
Clean all tools and application equipment with water immediately after use. Hardened / cured material can only be removed mechanically.