Sikadur® 31 
Thixotropic Epoxy
Resin Adhesive
 
Technical Data Sheet
 
DESCRIPTION
 
Sikadur 31 is a two component, solvent free, moisture insensitive, high viscosity, epoxy paste adhesive and repair mortar.
 
COMPLIANCE
 
Sikadur 31 complies with ASTM C-881, Types I, Grade 3, Classes B and C.
 
WHERE TO USE
 
Sikadur 31 is an extremely versatile product which can be used for a multitude of applications such as:
  • Thin film bonding (both structural and cosmetic)
  • Concrete repairs
  • Filling blow holes
  • Bolt grouting (both horizontal and overhead)
  • Crack and surface sealing
  • For use with the Sikadur-Combiflex Joint Sealing System
 
ADVANTAGES
 
  • Easy to mix and apply
  • Components of different colours to ensure thorough mixing
  • Convenient 1 to 1 mixing ratio
  • Excellent adhesion to concrete and a wide variety of other substrates
  • Can be applied to damp surfaces
  • Ideal for vertical and overhead applications
  • High abrasion resistance
 
 
 
 
 
 
 
 
 
 
 
 
 
MIXING PROCEDURE
 
Sikadur 31 can either be mixed by hand (in small quantities, i.e. 1 litre) or by mechanical mixing.

Mix both components thoroughly before use. Proportion equal amounts BY VOLUME of BOTH components into a suitable, clean mixing container. Depending on the volume, mix thoroughly using a large steel spatula or 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).

Only mix sufficient material that can be readily used within its pot life.
 
APPLICATION
 
Bonding and concrete repairs
 
Apply Sikadur 31 to the prepared substrate by trowel, spatula or a stiff brush. Ensure that it is worked into the surface, especially if the surface is damp. Secure the material or unit to be bonded to the substrate while the Sikadur 31 is still tacky. Take into consideration the ambient and surface conditions in relation to the “Open Times” given in the technical data. The glue line should be kept as thin as possible (minimum thickness 1mm) and must not exceed 5 mm.

If the Sikadur 31 loses tackiness and becomes glossy, recoat with additional material and continue.
 
Horizontal and overhead anchor bolt grouting
 
The correct quantity of Sikadur 31 required to completely fill the annular gap between the bolt and the sides of the hole should be determined before installation is attempted. (In most cases, the bolt hole will be no greater than 5 mm larger in diameter than the bolt.) Place the predetermined quantity of Sikadur 31 directly into the bolt hole. Push the anchor bolt into the hole and press it gently to the bottom, displacing the Sikadur 31 and filling the anulus around the bolt. A slight agitation of the bolt will assist the Sikadur 31 to fill the anulus evenly. Centre or locate the bolt in the desired position, using shims if necessary and then leave undisturbed until the Sikadur 31 is tack free.
 
 
 
LIMITATIONS
 
Ambient and surface temperatures must be 5°C or above during application.
 
Maximum thickness in one layer:
Horizontal: 30 mm
Vertical/Overhead: 10 mm
 
Do not thin with solvents.
 
Cured Sikadur 31 is a vapour barrier.
 
CLEAN UP
 
Remove uncured Sikadur 31 from tools 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
 
As a bonding adhesive: 1 litre covers approximately 0,5 m2 at a thickness of 2 mm.
 

PACKAGING
 
2 litre, 5 litre and 10 litre kits (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. The surface may be dry or damp, but it must be free of any standing water.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
If the Sikadur 31 does not fill the annular gap evenly during bolt insertion, withdraw the bolt and insert additional Sikadur 31 and re-insert the bolt. Do not attempt to add additional Sikadur 31 with the bolt in place.
 
TECHNICAL DATA
Shelf Life 6 Months in original, unopened packaging.
Storage Conditions Store in a dry area between 5ºC and 35ºC. Protect from direct sunlight and moisture
Colour Component “A” : White
Component “B” : Charcoal
Grey when mixed
Mixing Ratio Component “A” : Component “B” = 1 : 1 by volume.
Density Mixed: 1,7kg/litre
Viscosity Approximately 190,000cps @ 25°C when mixed
   
Property Age 25°C Temperature
Pot Life 100g N/A 40 mins
Open time @1mm film N/A 2 hrs
COMPRESSIVE PROPERTIES
Compressive strength N/mm² 8 hrs 25,0
24 hrs 53,4
7 days 65,0
28 days 65,0
Young’s modulus N/mm² 28 days 8,500
TENSILE PROPERTIES
Tensile Strength N/mm² 14 days 20,0
Elongation at Break 14 days 1,5%
FLEXURAL PROPERTIES
Flexural Strength N/mm² 14 days 30,0
BOND STRENGTH
To concrete N/mm² 14 days 3,5 (concrete failure)
To Steel N/mm² 14 days 20.0
 
 
 
 
 
 
 
 
 
 
 
 
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.

CALCULATION OF GROUT QUANTITIES
   
  Volume of Bolt Holes
Less:
 Volume of Embedded Bolt
=
 Volume of Sikadur 31
Volume of Sikadur 31 = (∏  r2H - ∏  r2 L) x 1000
 
Where H = Depth of Hole (In metres)
L = Length of Embedded Bolt (In metres)
“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