Sikadur® 52
Low Viscosity Epoxy
Injection Resin
 
Technical Data Sheet
 
DESCRIPTION
 
Sikadur 52 is a two component, low viscosity, solvent free, moisture insensitive, structural epoxy injection resin.
 
COMPLIANCE
 
Sika 52 complies with ASTM C-881, Types I and II, Grade 1, Classes B and C.
 
WHERE TO USE
Sikadur 52 is used to fill and seal cracks and cavities in structural concrete components such as:
  • Columns
  • Beams
  • Foundations
  • Silos
  • Decks
  • Water retaining structures
It forms an effective barrier against the infiltration of water and bonds the concrete sections together, restoring their structural integrity.

Sikadur 52 can also be used for preparing epoxy mortars and overlays, and sealing applications for concrete and mortar substrates.
ADVANTAGES
 
  • Very low viscosity: penetrates cracks as narrow as 0,2 mm
  • Excellent adhesion
  • Moisture insensitive
  • Easy to mix and apply
  • Does not embrittle
 
 
 
 
 
 
 
 
 
 
 
 
 
APPLICATION
 
Crack Injection: Gravity Feed
(Horizontal Applications)
 
Determine if the crack reflects through the slab and seal one side with Sikadur 31 if necessary. Create a vee notch in the crack using a hammer and chisel, then ensure that it is clear of any debris that will inhibit penetration. Apply a bead of Sikacryl around the crack (see Diagram 1) to provide a containment dam. Pour Sikadur 52 into the vee notched crack until it is completely filled.
 
Crack Injection: Pressure Injection
 
There are various application methods using different equipment that can be used to inject Sikadur 52 which are dependent on the nature of the work. It is therefore advisable to contact our Technical Department for specific recommendations.

The following diagrams show a typical application technique. After the surface has been prepared, injection ports are installed along the entire length of each crack. The distance between each port is dependent upon depth and width of the crack involved but, in most cases, it should be between 30 and 50 cm.

Diagram 2 and 3 show the preparation and installation of a pipe injection port for cracks greater than 0,5 mm in width.

Diagram 4 shows the approach that should be adopted for cracks smaller than 0,5 mm or where the crack does not run at right angles to the surface. In this case, a flanged fitting replaces the installation of a tube.

After the installation of the injection ports, each crack is sealed with Sikadur 31 along its entire length on both sides of the substrate. It is imperative to allow the Sikadur 31 to reach initial cure before commencing injection. This will take between 4 and 12 hours depending upon the ambient conditions.

To avoid any counter pressure during application and to ensure an open injectable system, each injection port is blown-through in a continuous sequence with compressed air starting from the bottom (see Diagram 5).

Sikadur 52 is injected using a grease gun or modified cartridge gun, immediately after mixing, commencing at the lowest injection port. Slow and even pressure is applied until Sikadur 52 begins to
 
 
 
 
 
 
 
 
 
 
 
 
Sikadur 52 Mortars and Overlays
 
Prime the prepared substrate with unfilled Sikadur 52. Place the Sikadur 52 mortar onto the primed substrate before the primer coat becomes tack-free. Place, compact and finish the mortar with a suitable trowel. Sikadur 52 mortars are for interior use only.
 
 
 
 
 
 
 
 
LIMITATIONS
 
Ambient and surface temperatures must be 5°C or above during application.

Do not thin.

Do not use for injecting into cracks under hydrostatic pressure or for cracks greater than 5 mm.

Can only be filled with oven dried aggregates.

Maximum Sikadur 52 mortar thickness: 40 mm per lift.

Sikadur 52 mortar is for Interior use only

Do not use for sealing exterior slabs on grade.

Cured Sikadur 52 is a vapour barrier.

Minimum age of new concrete: 28 days.
 
CLEAN UP
 
Remove uncured Sikadur 52 from tools and equipment with Kwiklean water soluble solvent immediately after use. Cured material can only be removed mechanically.
 
HEALTH PRECAUTIONS
 
Component A - Irritant - Prolonged contact to skin may cause skin sensitisation and eye irritation.
Component B - Irritant - Contact with skin or eyes may cause severe burns.
 
SAFETY PRECAUTION
 
Use adequate ventilation. Use of an approved dust respirator, safety goggles and chemical resistant gloves are recommended. Immediately remove contaminated clothing.
 
 
 
 
COVERAGE
 
For preparing an epoxy mortar: 1 litre of Sikadur 52, when mixed with 5 litres (loose volume) of oven dried silica sand, yields approximately 5,6 litres of mortar.
 
PACKAGING
 
1.5 litre kits (Components A+B)
 
Instructions for Use 
 
SURFACE PREPARATION
 
All surfaces must be clean, sound and properly cured. Remove all loose materials mechanically, with a wire brush, or by water or sand blasting. Surfaces may be dry or damp, but they must be free of any standing water.
MIXING PROCEDURE
 
Mix both components thoroughly before use.
Proportion 2 parts by volume of Component A with 1 part by volume of Component B into a suitable, clean mixing container. Mix thoroughly using a slow speed drill (set at 400 - 600 rpm) with a clean, rust free, mixing paddle until the two components are evenly blended to a uniform colour (minimum 3 minutes). Use immediately.

Only mix sufficient material that can be readily used within its pot life.

To prepare a mortar: Add approximately 5 parts by loose volume of oven dried concrete sand to 1 part by volume of mixed Sikadur 52 and mix until a uniform consistency is achieved.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
ooze from the port immediately above the one being injected. The injection gun is then removed and the port is sealed (se Diagram 6). This process is then repeated commencing with the next injection port.

In order to ensure that the resin flows correctly into each crack and that it does not leave the structure at another point, the volume of injected material should be monitored during the injection process.

When the application is complete and the Sikadur 52 has completely cured the injection ports can be removed with a hammer and a chisel. The residual Sikadur 31 can be removed and smoothed with a grinding disc.
 
Sealing
 
Apply Sikadur 52 to the prepared substrate by either roller or brush (see Diagram 7). Ensure penetration occurs and remove any excess to prevent a surface film.
 
 
 
 
 
 
TECHNICAL DATA
Shelf Life 12 months in original, unopened container.
Storage Conditions Store in a dry area, between 5C and 30C. Protect from direct sunlight.
Colour Component A : Clear
Component “B” : Amber
Amber when mixed
Mixing Ratio  
Components
 
“A”
“B”
By volume
2
1
Density Mixed: 1,07kg/litre
Property (unfilled Sikadur 52) Age
Temperature
5°c
25°c
35°c
Pot Life N/A 80 mins 25 mins 10 mins
Tack free time N/A 16 hrs 4 hrs 2hrs
COMPRESSIVE PROPERTIES
Compressive strength N/mm 8 hrs
-
-
22,4
24 hrs
-
46,5
63,8
7 days
55,2
74,1
72,4
14days
72,4
77,5
72,4
28 days
82,0
77,5
72,4
Youngs modulus N/mm 28 days
-
6,500
-
TENSILE PROPERTIES
Tensile Strength N/mm 14 days
-
37,0
-
Elongation at Break 14 days
-
4,25%
-
FLEXURAL PROPERTIES
Flexural Strength N/mm 14 days
-
60,0
-
BOND STRENGTH
To concrete N/mm 14 days
-
3,6 (concrete failure)
-
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
FIRST AID
 
Skin Contact: Wash thoroughly with soap and water.
 
Eye Contact: Flush immediately with water for 10 - 15 minutes and contact a physician immediately.
 
Respiratory Problems: Remove affected person to fresh air immediately and contact a physician.
 
Hygiene: Wash hands immediately after use. Wash clothing before re-use.
 
SPILLS
 
Collect with absorbent material. Uncured material may be removed with a suitable solvent.
 
DISPOSAL
 
Dispose of in accordance with local regulations.
 
WARNING
 
KEEP CONTAINER CLOSED WHEN NOT IN USE.
KEEP OUT OF REACH OF CHILDREN.
NOT FOR INTERNAL CONSUMPTION.
 
Contact Sika for further health and safety information.
“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 within their shelf life. 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 proprietary rights of third parties must be observed. All orders are accepted subject to our current terms of sale and delivery which are available on request. Users should always refer to the most recent issue of the Technical Data Sheet for the product concerned, copies of which will be supplied on request, or can be accessed on the internet under www.sika.co.za.”
The Company reserves itself the right to change the formulation of Sika products if so required by new research and development. Rev. 10/2002