Sikagard®-63
Chemical resistant epoxy protective coating
Sikagard®-63 is a solvent free, two part, total solid, coloured epoxy resin based high build thixotropic protective coating with high chemical resistance. It can be used on many types of structures or elements such as cementitious, metallic and epoxy resin binder substrates. The chemical resistant properties provide surface protection from aggressive chemicals that can cause rapid degradation.
- Good chemical resistance
- Good temperature resistance
- Good abrasion resistance
- Solvent free
- Low VOC emissions
- High build
- Impervious to liquids
- Easy to mix
- Applied by brush, roller or airless spray
Usage
Chemical resistant protective coating on:- Concrete
- Stone
- Cementitious mortars
- Renderings
- Epoxy cement
- Epoxy resin-based products
- Steel
- Silos
- Bund linings
- Chemical mixing tanks
- Chemical containment tanks
- Fuel and oil tanks
- Sludge tanks
- Industrial chemical areas
- Sewage, effluent and waste water treatment
- Food processing plants
- Sewage treatment works
- Chemical and pharmaceutical facilities
- Beverage facilities
Advantages
- Good chemical resistance
- Good temperature resistance
- Good abrasion resistance
- Solvent free
- Low VOC emissions
- High build
- Impervious to liquids
- Easy to mix
- Applied by brush, roller or airless spray
Packaging
Part A+B pre-batched | 4 kg set |
Part A (Coloured resin) | 3 kg container |
Part B (Hardener) | 1 kg container |
Colour
Part A (Resin) | Coloured, Liquid |
Part B (Hardener) | Brownish, Liquid |
Selected RAL colours available, please consult with Sika representative for more details.
IMPORTANT
Applied colours selected from colour charts will be approximate.
IMPORTANT
The product uses an aromatic hardener and may change colour after application. If final colour is of prime importance, select alternative Sika products.
IMPORTANT
Colour uniformity cannot be completely guaranteed from batch to batch. Do not mix batch numbers in a single area.
IMPORTANT
For colour matching: Apply colour sample and confirm selected colour under real lighting conditions.
IMPORTANT
When product is exposed to direct UV exposure (sun, lamp, skylight, etc.), there may be some discolouration and colour variation, this has no influence on the function and performance of the coating.
Product Details
Chemical base
Epoxy resin
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 +10 °C and +30 °C.
Density
Part A+B mixed | ~1.5 kg/L |
Part A | ~1.60 kg/L |
Part B | ~1.11 kg/L |
All density values at +27 °C.
Solid content by weight
100 %
Tensile adhesion strength
Concrete | > 1.5 N/mm2 (failure in concrete) |
Steel (SA 2.5) | > 15 N/mm2 |
Heat resistance
Exposure* | Dry Heat |
Permanent | + 40 ° C |
Short-term max. 3 d | + 60 ° C |
Short-term moist/wet heat* up to + 60 °C where exposure is only occasional (steam cleaning etc.).
*No simultaneous chemical and mechanical exposure.
Chemical resistance
Test medium | 24 h | 7 d | 42 d | 6 m |
Acetone | A | A | A | A |
Ethanol 96 % | A | A | A | A |
Formic acid 10 % | A | A | A | A |
Acetic acid 20 % | A | A | D | D |
Water | A | A | A | A |
NaOH 50 % | A | A | A | A |
Nitric acid 20 % | D | C | - | - |
Hydrochloric acid 37 % | D | D | D | D |
Sulphuric acid 50 % | A | D | D | D |
acc. IS 4631-1968, +30 °C
A = resistant, C = not resistant, D = resistant but with discolouration and/or loss of gloss
Application
Mixing ratio
Part A : Part B = 3: 1 (by weight)
Ambient air temperature
+8 °C min. / +35 °C max.
Relative air humidity
80 % max.
Dew point
Beware of condensation.
The substrate and uncured applied floor material must be at least +3 °C above dew point to reduce the risk of condensation or blooming on the finish.
Substrate temperature
+8 °C min. / +35 °C max.
Substrate moisture content
< 4 % parts by weight
Test method: Sika®-Tramex meter, CM-measurement or Oven-dry-method. No rising moisture according to ASTM (Polyethylene-sheet).
Pot life
Temperature | Pot life |
+10 °C | ~90 minutes |
+20 °C | ~45 minutes |
+30 °C | ~35 minutes |
Waiting time / Overcoating
Before applying Sikagard®-63 on Sikafloor®-161 HC allow:
Substrate Temperature | Minimum | Maximum |
+10°C | 24 hours | 4 days |
+20°C | 12 hours | 2 days |
+30°C | 6 hours | 1 day |
Before applying Sikagard®-63 on Sikagard®-63 allow:
Substrate Temperature | Minimum | Maximum |
+10°C | 9 hours | 3 days |
+20°C | 5 hours | 2 days |
+30°C | 4 hours | 1 day |
Note: Times are approximate and will be affected by changing ambient conditions particularly temperature and relative humidity.
Applied product ready for use
Temperature | Foot traffic | Full cure |
+10 °C | ~24 hours | ~15 days |
+20 °C | ~18 hours | ~9 days |
+30 °C | ~12 hours | ~7 days |
Note: Times are approximate and will be affected by changing ambient conditions.
Consumption
Coating System | Product | Consumption |
Scratch coat (optional) | Sikafloor®-161 HC + Sika® Quartz 01 IN | Refer to PDS |
Primer | Sikagard®-67 / Sikafloor®-161 HC | 0.2–0.4 kg/m2 |
Roller coating | Sikagard®-63 | 0.3–0.5 kg/m2 per coat, dependent on substrate condition and required coating thickness |
Lamination | Sikagard®-63 + Sika® Fabric-50 | 1st layer: 0.7 kg/m2 |
Note: For a theoretical dry film thickness of 100 microns (0.1 mm) approx. 0.15 kg/m2 must be applied.
These figures are theoretical and do not allow for any additional material due to surface porosity, surface profile, variations in level and wastage etc.
APPLICATION INSTRUCTIONS
IMPORTANT
Strictly follow installation procedures
Strictly follow installation procedures as defined in Method Statements, application manuals and working instructions which must always be adjusted to the actual site conditions.
EQUIPMENT
Mixing
- Electric single paddle mixer (300 to 400 rpm)
Application
- Squeegee
- Short pile roller
SUBSTRATE QUALITY
- The concrete substrate must be sound and of sufficient compressive strength (minimum 25 N/mm2) with a minimum pull off strength of 1.5 N/mm2.
- The substrate must be clean, dry and free of all contaminants such as oil, grease, coatings and surface treatments, etc.
SUBSTRATE PREPARATION
IMPORTANT
Incorrect treatment of cracks
The incorrect assessment and treatment of cracks may lead to a reduced service life and reflective cracking.
- Concrete substrates must be prepared mechanically using abrasive blast cleaning or scarifying equipment or diamond grinding machine to remove cement laitance and achieve an open textured surface.
- Weak concrete must be removed and surface defects such as blow holes and voids must be fully exposed.
- Repairs to substrate, filling of blowholes/voids and surface levelling must be carried out using appropriate products from the Sikafloor®, Sikadur® and Sikagard® range of materials.
- High spots can be removed by grinding.
- All dust, loose and friable material must be completely removed from all surfaces before application of the product, preferably by brush and/or vacuum.
- The concrete or screed substrate has to be primed or levelled in order to achieve an even surface.
MIXING
IMPORTANT
Mix full units only
- Mix Part A (resin) until the coloured pigment is dispersed and a uniform colour is achieved.
- Add Part B (hardener) to Part A.
- Mix Part A+B continuously for 2 minutes until a uniformly coloured mix is achieved. Note: Avoid excessive mixing to minimise air entrainment.
- To ensure thorough mixing, pour materials into another container and mix again to achieve a smooth and uniform mix.
- During the final mixing stage, scrape down the sides and bottom of the mixing container with a flat or straight edge trowel at least once to ensure complete mixing.
- Wait for approx 3 minutes before application.
APPLICATION
IMPORTANT
Application in high moisture
If > 4 % pbw moisture content, Sikafloor® EpoCem® may be applied as a T.M.B. (temporary moisture barrier) system.
IMPORTANT
Protecting the material after application
After application, protect the system from damp, condensation and direct water contact for at least 24 hours.
IMPORTANT
Temporary heating
If temporary heating is required, do not use gas, oil, paraffin or other fossil fuel heaters. These produce large quantities of both carbon dioxide and water vapour, which may adversely affect the finish.
- For heating, use only electric powered warm air blower systems.
COATING OR LAMINATION APPLICATION
- Apply the Product with a stiff brush or a short piled, solvent resistant roller.
- Back roll the surface in two directions at right angles with a short pile roller.
- (For lamination only) The fabric should be embedded in the ‘wet’ Sikagard®-63 using a special profiled roller
Note: Maintain a "wet edge" during application for a seamless finish.
Note: Avoid puddles on the surface during application.
CLEANING OF TOOLS
Clean all tools and application equipment with Sika® Thinner C or suitable solvent immediately after use. Hardened material can only be removed mechanically.