Sika Lastic 450 I

DESCRIPTION

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.

USES

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

Important: Not suitable for permanent water immersion

or water-retaining structures such as RC tanks,

swimming pools, water features, etc.

CHARACTERISTICS / 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

PRODUCT INFORMATION

Chemical base Aliphatic polyurethane modified bituminous emulsion

Packaging 20 kg container

Shelf life 12 months from date of production

Storage conditions The product must be stored in original, unopened and undamaged sealed

packaging in dry conditions at temperatures between +5 C and +30 C.

Colour Liquid Black

Cured membrane Black

Note: When exposed to UV light, cured coating will start to yellow slightly

without losing its physical properties.

Density 1.20 0.05 kg/L

Solid content by weight 60 %

1 /

TECHNICAL INFORMATION Tensile strength 3.0 N/mm2 (14 days at +27 C with Sika Fabric-50) (ASTM D412) Elongation at break 900 % (14 days at +27 C) (ASTM D412) Crack bridging ability Passes 3 mm Mandrel (IS 101) Service temperature -20 C to +80 C Heat resistance 120 C (Softening point) (ASTM D36) Water absorption Negligible Permeability to water vapour 25 g/m2/day (IS 101) Behaviour after artificial weathering No cracking and no blistering in 500 hours (IS 101) SYSTEM INFORMATION 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 Fabric-50 Top coat Sikalastic-450 (I) Dry film thickness Standard Coating System 1.0 mm Reinforced Coating System 1.2 mm APPLICATION INFORMATION Consumption Important: The material must not applied at excessive film thicknesses in one layer. Excessive film thickness may create bubbles. Important: During the curing process micro bubbles are formed. This is a product characteristic, which does not affect the protective properties. Build-up Product Consumption Layer 1 Sikalastic-450 (I) diluted with water in 1:1 0.25 kg/m2(Diluted) Layer 2 Sikalastic-450 (I) 0.850 kg/m2 Layer 3 Sika Fabric-50 1 m2/m2 Layer 4 Sikalastic-450 (I) 0.800 kg/m2 Total Sikalastic-450 (I) for 2 coats 1.7 kg/m2 Note: 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. Note: A third coat may be required to for full hiding of Sika Fabric-50, if visible. Ambient air temperature +10 C min. / +40 C max. Relative air humidity 80 %

Substrate temperature +10 C min. / +40 C max. Substrate moisture content 6 % parts by weight. The following test methods can be used: Sika-Tramex meter, CM-measurement or Oven-dry-method. No rising moisture according to ASTM (Polyethylene-sheet). Pot life 3 hours at +30 C Waiting time / Overcoating Primer to Base coat 2-4 hours Base coat to Sika Fabric-50 Immediately on wet Base coat Top coat to Base coat 24 hours Top coat to protection screed 7-10 days Note: For vertical upstands sand should be broadcast on the wet 2nd coat for better bonding with protection overlay. Applied product ready for use Note: Water ponding test shall be done only once the coating is fully cured. Note: The product after full cure is slightly tacky. Full cure requires about 7-10 days at +30 C depending on humidity and ventilation BASIS OF PRODUCT DATA All technical data stated in this Product Data Sheet are based on laboratory tests. Actual measured data may vary due to circumstances beyond our control. ECOLOGY, HEALTH AND SAFETY User must read the most recent corresponding Safety Data Sheets (SDS) before using any products. The SDS provides information and advice on the safe handling, storage and disposal of chemical products and contains physical, ecological, toxicological and other safety-related data. APPLICATION INSTRUCTIONS 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 minimim 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 Product is supplied ready for use. Before application, mix for at least 1 minute or until the liquid has achieved a uniform colour. APPLICATION Important: Protect the coating from damp, condensation and direct water contact for at least 3-5 days. Important: If applied on porous substrates during rising temperatures pin holes may occur from rising air. Apply during falling temperatures. Important: Do not apply on roofs with improper slopes leading to long ponding. Important: Do not allow temporary ponding to remain between coats on any horizontal surfaces or until the final coating has totally cured. Brush or mop surface water away during this time. Note: Viscosity of the product may become higher due to change in temperature and humidity at the time of application, the product should be diluted with water 20 % maximum by weight, i.e. 4 kg of water for 20 kg of Sikalastic-450 (I) at site to achieve a workable consistency. Prepare primer of Sikalastic-450 (I) by diluting in 1:1 with clean water and apply with a hard brush, roller or airless spray. Ensure a continuous pore free coat covers the substrate. 1. 2. Apply the first coat of Sikalastic-450 (I). Apply Sika Fabric-50 on the surface while first coat is wet and use a roller or brush to fully embed the fabric in the coating without any bubbles or creases. Reinforcement overlaps must be a minimum of 50 mm. 3. Apply the second coat to achieve the required film thickness. 4. (Optional) A third coat may be necessary to acheive the required dry film thickness. 5. Protect with protection screed. It is recommended to use a separation layer such as geotextile or PE shee

CLEANING OF TOOLS Clean all tools and application equipment with Thinner C immediately after use. Hardened or cured material can only be removed mechanically. LOCAL RESTRICTIONS User must read the most recent corresponding Safety Data Sheets (SDS) before using any products. The SDS provides information and advice on the safe handling, storage and disposal of chemical products and contains physical, ecological, toxicological and other safety-related data. LEGAL NOTES The information, and, in particular, the recommendations relating to the application and end-use of Sika products, are given in good faith based on Sika's current knowledge and experience of the products when properly stored, handled and applied under normal conditions in accordance with Sika's recommendations. In practice, the differences in materials, substrates and actual site conditions are such that no warranty in respect of merchantability or of fitness for a particular purpose, nor any liability arising out of any legal relationship whatsoever, can be inferred either from this information, or from any written recommendations, or from any other advice offered. The user of the product must test the products suitability for the intended application and purpose. Sika reserves the right to change the properties of its products. The proprietary rights of third parties must be observed. All orders are accepted subject to our current terms of sale and delivery. Users must always refer to the most recent issue of the local Product Data Sheet for the product concerned, copies of which will be supplied on reques