Product Data Sheet Show all documents

Sikagard®-300

(former MProtect 300)

HIGH BUILD, CRACK-BRIDGING, ELASTOMERIC, PROTECTIVE, AND WATERPROOF COATING FOR CONCRETE & MASONRY

Sikagard®-300 is a single component, high performance, acrylic resin based coating for long term protection of concrete & masonry from aggressive atmospheric gases such as, carbon dioxide, sulphur dioxide and chloride ions. It is available in standard colours. It can be made available in custom colours subject to prior agreement.

  • Anti-carbonation and sulphate coating - High resistance to CO2 & SO2 diffusion.
  • Resistant to diffusion of chloride ions – suitable for marine applications.
  • UV resistant – suitable for exposure.
  • Resists water ingress and permeable to water vapour – suitable for exposure to splashes or wind driven rain
  • Resists dirt pick up, and growth of fungus – suitable for use in the tropics
  • Sikagard®-300 – copes with thermal movements of buildings.
  • Washable - coating with excellent durability
Product Data Sheet Show all documents

Usage

Sikagard®-300 is recommended for external protection of concrete to prevent ingress of atmospheric corrosive gases, wind driven rain, and water borne chlorides. Applications include protection of :
  • Bridges, Flyovers, Aqueducts, viaducts
  • Residential & Commercial Buildings
  • Multi storey car parks & podiums
  • Chimneys, cooling towers and silos.
  • Jetties and berths.
  • Overhead water tanks.
  • Industrial buildings and power plants.
Sikagard®-300 is not recommended for application in areas likely to be submerged in water and on floors subjected to traffic  

Advantages

  • Anti-carbonation and sulphate coating - High resistance to CO2 & SO2 diffusion.
  • Resistant to diffusion of chloride ions – suitable for marine applications.
  • UV resistant – suitable for exposure.
  • Resists water ingress and permeable to water vapour – suitable for exposure to splashes or wind driven rain
  • Resists dirt pick up, and growth of fungus – suitable for use in the tropics
  • Sikagard®-300 – copes with thermal movements of buildings.
  • Washable - coating with excellent durability

Packaging

25 kg

Product Details

Product Information

Shelf Life

12 months

Storage Conditions

Store under cover, out of direct sunlight and protect from extremes of temperature. In tropical climates the product must be stored in an air conditioned environment.

Density

1.35 ± 0.05 kg/ltr

Solid content by volume

46%

Consistency

Thick Paste
Technical Information

Tensile Strength

> 2.5 MPa

(ASTM D 638)

Cross cut

Adhesion

4/5 (excellent)

(AS 1580 408.2)

Service Temperature

5°C to 40°C

Permeability to Water Vapour

26.0 g/m²/24 Hours

(DIN 52615)

Diffusion resistance to carbon dioxide

> 50m

Chloride Ion Diffusion Resistance

4.98 x 10-10 cm²/s

Behaviour after Artificial Weathering

No color change or chalking

(Appearance after 2000 hr. accelerated weathering)

Application

Application Information

Curing Time

Full cure : 7 Days

Drying Time

Touch dry : 1 Hour at 25°C
Re-coatable: 4 Hours at 25°C
Consumption

Consumption

Minimum recommended rate of application for Sikagard®-300 is 0.45 Kg/m²/coat.

Each pack of 25kg is sufficient for an area of 28 m² to achieve the recommended final dry film thickness of 300μ.

The coverage rate is strongly influenced by the roughness and porosity of the substrate.
Application steps

SUBSTRATE QUALITY

New masonry and concrete should be at least 14 days old before treatment and with moisture level in substrate below 7% by volume.

SUBSTRATE PREPARATION

Correct substrate preparation is critical for optimum performance. The surface to be treated must be thoroughly cleaned. Remove all traces of formwork, release agent, grease, efflorescence, laitance, algae, or other contaminant that may prevent proper adhesion.

Remove organic materials by scraping, brushing or high pressure water cleaning. Spores must be treated with a suitable fungicide sterilizing agent and carefully rinsed.
On non-decorated concrete surface containing blow holes and/or minor irregularities, and on some rough rendered or dashed surface, it is advantageous to use SikaEmaco® N 5100 to close the surface, thus preventing the possibility of pinholes occurring. Cracks wider then hairline should be patched using Sikadur®-1438 or sealed using acrylic caulk before treatment.

 

MIXING

Stir (do not dilute) to obtain a uniform mixture before use.

APPLICATION

Apply Sikagard®-300 in one coat using airless spray to achieve a wet film thickness of 650μ or in two coats each of 325μ WFT using roller or brush, with the second coat applied 2 – 4hrs after the first and at right angle to it. The prepared substate must be air-dry when the first coat is applied. Where a textured finish is required use a medium nap roller to apply the product and over roll with a textured roller to give the desired finish in one direction only.
Only apply Sikagard®-300 when the ambient temperature and substrate temperature are at least 5ºC and will not fall below 5ºC with-in 24 hours. To avoid condensation which influences the adhesion negatively, surface temperature during application should be at least 3ºC higher then the dew point.

 

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