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Sikagard®-65 WN BH
Water-dispersed epoxy coating for curing and protection of concrete
Sikagard®-65 WN BH is a solvent-free, water-dispersed, two part epoxy resin for curing and protection of precast concrete segments immediately after de-moulding.
It is designed and formulated to meet high durability demands in aggressive environments.
Suitable for use in hot and tropical climatic conditions.
- Easy and fast to apply with a roller or spray equipment
- Water dispersed
- Solvent free
- Good hiding properties / cosmetic finish
- Fast curing at high temperature
- Pore sealer
- Increased chemical resistance
- Increased abrasion resistance
- Tools can be cleaned with water
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Usage
Sikagard®-65 WN BH is used to cure and protect precast concrete segments, as an efficient alternative to conventional curing and protection procedures.Advantages
- Easy and fast to apply with a roller or spray equipment
- Water dispersed
- Solvent free
- Good hiding properties / cosmetic finish
- Fast curing at high temperature
- Pore sealer
- Increased chemical resistance
- Increased abrasion resistance
- Tools can be cleaned with water
Packaging
20 kg sets (Part A + B)
Colour
Grey
Product Details
Composition
Water-dispersed epoxy resin
Shelf life
12 months from date of production.
Storage conditions
Store in unopened, undamaged and sealed original packaging in dry conditions at temperatures between +5 °C and +30 °C. Protect from direct sunlight, heat and moisture.
Density
~1.35 kg/l (at +20°C, mixed A and B)
Solid content by weight
~56 %
Solid content by volume
~41 % (theoretical)
Tensile Adhesion Strength
≥ 1.5 N/mm2 (failure in concrete) | (BS 1881 - Part 207) |
Chemical Resistance
Sikagard®-65 WN BH is designed to provide specific chemical resistance to concrete against chlorides and sulphates found in the ground in aggressive environments.
Application
Mixing Ratio
(A : B) = (3 : 1) by weight
Relative Air Humidity
<80 %
Dew Point
Beware of condensation!
The substrate must be at least 3 °C above dew point to reduce the risk of condensation or blooming on the surface of the applied product.
Substrate Temperature
+10°C min. / +60°C max.
Substrate Moisture Content
The substrate can be either dry or matt-damp green concrete and must be cleaned of loose cement particles and all contaminants such as oils, grease, coatings or surface treatments etc..
Pot Life
~60 minutes at +20°C (Caution! End of pot life is not visually noticeable)
Curing Time
Temperature | +20 °C | +30 °C |
Minimum curing time before transportation of segments | 12 hours | 4 hours |
Fully cured | 10 days | 7 days |
Note: at below 80 % r.h.
Waiting Time / Overcoating
Min. 2 hous (25°C)
Max. 2 days (25°C)
Note: Apply second coat only after the first coat is tack-free
Consumption
Single coat application on segments | 1 x Sikagard®-65 WN BH | 300 – 450 g/m2 |
Double coat application on segments | 1 x Sikagard®-65 WN BH 1 x Sikagard®-65 WN BH | 150 – 250 g/m2 100 – 200 g/m2 |
SUBSTRATE PREPARATION
- The 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 dirt, oil, grease, coatings and surface treatments, etc.
- Concrete substrates must be prepared mechanically 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 the substrate, filling of blowholes / voids and surface levelling must be carried out using appropriate products from the Sikafloor®, Sikadur® and Sikagard® range of materials.
- All dust, loose and friable material must be completely removed from all surfaces before application of the product, preferably by brush or vacuum.
MIXING
Prior to mixing stir part A mechanically. When all of part B has been added to part A mix continuously for 3 minutes until an uniform mixed has been achieved. Use a low speed electrical stirrer (max. 600 rpm) to avoid air entrapment. To ensure proper mixing pour material into a clean container and stir again.
APPLICATION
Sikagard®-65 WN BH may be applied either with a brush, roller or airless spray.
CLEANING OF EQUIPMENT
Clean all tools and application equipment with water immediately after use.
Hardened and/or cured material can only be mechanically removed.