Sikalastic®-450 (I)
Sikalastic®-450 (I) is a single component, elastomeric, aliphatic polyurethane based liquid applied waterproof coating system. It cures to form an highly elastic, seamless, waterproof coating with excellent crack bridging properties.
- Excellent crack bridging properties
- Elastomeric membrane that cures with aerial moisture to a flexible and rubbery coating
- Single component, ready to use
- Easy application by brush, airless spray or roller
- Economical
- Root resistant as a part of built up system
- Abrasion resistant
- Hydrolysis resistant
- Resistant to mild acid and chemicals and industrial environment.
- Weathering and UV resistant
- Low VOC and Eco-friendly
Usage
- Seamless, impervious coating for application on roofs and concrete structures
- Protective coating in infrastructure projects in civil engineering on non-trafficked areas
- Used to waterproof variety of substrates concrete, brickwork, asphalt, corrugated asbestos sheets,etc
- Used for inverted roof structures
- Used for podium waterproofing as a part of built up system
- Can be applied on retaining walls before backfill
Advantages
- Excellent crack bridging properties
- Elastomeric membrane that cures with aerial moisture to a flexible and rubbery coating
- Single component, ready to use
- Easy application by brush, airless spray or roller
- Economical
- Root resistant as a part of built up system
- Abrasion resistant
- Hydrolysis resistant
- Resistant to mild acid and chemicals and industrial environment.
- Weathering and UV resistant
- Low VOC and Eco-friendly
Packaging
20 kg container
Colour
Black Liquid
Product Details
Chemical Base
Aliphatic polyurethane modified bituminous emulsion
Shelf Life
12 months from the date of production
Storage Conditions
Store in original, unopened and undamaged sealed packaging in dry conditions at temperatures between +5°C and +30°C.
Density
1.20±0.05 kg/liter
Solid content by weight
≥ 60%
System Structure
Standard Coating System
| System Build-Up | Product |
| Primer | Sikalastic®-450 (I) diluted with water 1:1 by weight |
| Base Coat | Sikalastic®-450 (I) |
| Top Coat | Sikalastic®-450 (I) |
Reinforced Coating System
| System Build-Up | Product |
| Primer | Sikalastic®-450 (I) diluted with water 1:1 by weight |
| Base Coat | Sikalastic®-450 (I) |
| Fabric reinforcement | Sika® Fab-1 |
| Top Coat | Sikalastic®-450 (I) |
Tensile Strength
| ≥ 3.0 N/mm2 | (ASTM D 412) |
After 14 days at +27°C with Sika® Fab1
Crack Bridging Ability
| Passes 3 mm Mandrel | (IS 101) |
Permeability to Water Vapour
| ~25 g/m2/day | (IS 101) |
Water Absorption
Negligible
Thermal Resistance
| ˃ 120°C (Softening Point) | (ASTM D36) |
Behaviour after Artificial Weathering
| No cracking and no blistering (500 hours) | (IS 101) |
Service Temperature
-20°C to +80°C
Dry film thickness
| 1.0 mm | Standard Coating System |
| 1.2 mm | Reinforced Coating System |
Application
Ambient Air Temperature
+10°C min. / +40°C max.
Relative Air Humidity
80% max
Substrate Temperature
+10°C min. / +40°C max.
Dew Point
Beware of condensation! The substrate and uncured membrane must be at least 3°C above the dew point to reduce the risk of condensation.
Substrate Moisture Content
< 6%
Pot Life
~ 3 hours at 30°C
Waiting Time / Overcoating
| Primer to Base coat | 2-4 hours |
| Base coat to Sika® Fab-1 | Immediately in wet Base coat |
| Top coat to Base coat | 24 hours |
| Top coat to Protection screed | 7-10 days |
Tack Free Time
~12-20 hours at 20°C and 50% Relative Humidity
Drying Time
Full Cure requires about 7 days at 30°C
Yield
| Build-up | Product | Consumption |
| Layer 1 | Sikalastic®-450 (I) diluted primer | ~0.25 kg/m2 |
| Layer 2 | Sikalastic®-450 (I) | ~0.50 kg/m2 |
| Layer 3 | Sika® Fab-1 | 1 m2/m2 |
| Layer 4 | Sikalastic®-450 (I) | ~0.50 kg/m2 |
These figures are theoretical and do not allow for any additional material due to surface porosity, surface profile, variations in level, overlaps and wastage etc.
SUBSTRATE PREPARATION
- The substrate must be clean, dry and free of all contamination such as dirt, oil, grease and coatings etc. which hinder an adhesion.
- The substrate must be sound and of sufficient strength of min M25 Grade(25 N/mm2). Also minimum Pull Off Strength must be 1.5 N/mm2
- Weak concrete must be removed and surface defects such as blowholes and voids must be fully exposed.
- All dust, loose and friable material must be completely removed from all surfaces before application of the product, preferably by brush and/or vacuum.
- Repairs to the substrate, filling of joints, blowholes/voids and surface levelling must be carried out using appropriate products from the Sikafloor®, Sikadur® and Sikagard® range of materials.
- High spots must be removed by e.g. grinding.
MIXING
Prior to application, stir Sikalastic®-450 (I) thoroughly in order to achieve a homogeneous mix.
APPLICATION
- Apply primer coat of Sikalastic®-450 (I) with 50% diluted with clean water, which will cure in 2-4 hrs depending on the atmospheric conditions, with an approx. consumption of ~0.25 kg/m2 with a hard brush, roller or airless spray.
- Apply the first coat of approx 0.50 kg/m2 of Sikalastic®-450 (I), then apply Sika® Fab-1 on the surface and ensure that there are no bubbles or creases. Overlapping of the Sika® Fab-1 is minimum 50 mm, allow this coat to dry for a period of 24 hours atleast depending on the atmospheric conditions.
- Apply second coat of approx 0.50 kg/m2 coat to achieve the required film thickness.
- Do not spoil the dry surface while walking on it for application. Material should be applied within the workable time.
- Full curing may take upto 7 days depending on temperature and humidity.
CLEANING OF TOOLS
Clean all tools and application equipment with Thinner C immediately after use. Hardened and/or cured material can only be removed mechanically.