Sika Sikadur-31 Thixotropic Epoxy Adhesive 1.2kg

2-component epoxy for structural bonding and repair of concrete, low VOC
Sikadur®-31+ is a 2-component, low VOC, thixotropic, moisture-resistant structural adhesive with high adhesion to most construction materials. It has high mechanical strength and can also be used for structural concrete repair, joint filling and crack sealing. Sikadur®-31+ can also be used in do it yourself (DIY) applications by private individuals in addition to professional applications.

• Easy to blend and apply
• Very low VOC emissions (GEV Emicode EC1PLUS)
• Very good adhesion to most building materials

Compressive strength
Class R4 (EN 1504-3)

~75 MPa (EN 12190)

• Ripening time

+10 °C +23 °C +30 °C

1. 1 day - 50 MPa 50 MPa
2. 3 days 50 MPa 65 MPa 70 MPa
3. 7 days 70 MPa 75 MPa 78 MPa

Tensile strength

• Ripening time

+10 °C +23 °C

1. 1 day - 8.5 MPa
2. 3 days 6 MPa 16 MPa
3. 7 days 16 MPa 20 MPa

Shear strength

• 16 MPa (EN 12615)

1. 50° 35 MPa
2. 60° 30 MPa
3. 70° 25 MPa

Tensile bond strength

• Passes (EN 12636) Cure Time Substrate Cure Temperature Adhesion Strength

1. 7 days Dry concrete +23 °C > 5 MPa *
2. 7 days Fresh concrete +23 °C > 5 MPa *
3. 7 days Steel +23 °C > 20 MPa

* 100% concrete failure

Adhesion in shear

1. 50° ≥ 60 MPa
2. 60° ≥ 70 MPa
3. 70° ≥ 80 MPa

Shrinkage
~0.01 % (EN 12617-1)

3.0 MPa (Controlled shrinkage / expansion) (EN 12617-4)

CTE
4.8 × 10-5 (± 0.2 × 10-5) 1/K (EN 1770)

Glass transition temperature
50 °C (EN 12614)

Thermal compatibility
Freeze and defrost cycles 3.00 MPa

Durability Passes

Chemical resistance

Resistant to many chemicals.

Uses
Suitable for repair work (Principle 3, Method 3.1 of EN 1504-9). Repair of crushed and damaged concrete in building applications, bridges and infrastructure projects. Suitable for structural reinforcement (Principle 4, Method 4.3 of EN 1504-9). Bonding of glued reinforcement plates Suitable for structural reinforcement (Principle 4, Method 4.4 of EN 1504-9). Concrete or Mortar Bonding The product can be used for interior and exterior applications.

AS A STRUCTURAL WELDING PRODUCT IN:

• Concrete elements
• High hardness natural rocks
• Ceramics, fiber cement
• Mortars, bricks, masonry
• Steel, iron, aluminum
• Wood
• Polyester, epoxy
• Glass

AS A REPAIR AND GEOMETRY RESTORATION MORTAR FOR:

• Structural (beams, columns, walls, etc.) and non-structural applications
• Minor local repairs, edge repair
• Filling and restoration of areas of insufficiently compacted concrete (honeycombs)
• Metal profiles
• Welding of visible (skinned) optical bricks

FOR PAYMENT AND STAMP TO:

• Joints and edge repair
• Non-structural static cracks
• Holes and gaps

Advantages

Easy to blend and apply
Very low VOC emissions (GEV Emicode EC1PLUS)
Very good adhesion to most building materials
High initial and final mechanical strength
Suitable for structural repair of concrete, class R4
Good adhesion to dry and wet concrete
Thixotropic: does not hang on vertical surfaces and ceiling applications
Does not require a primer
Good abrasion and chemical resistance
Different colored ingredients (to control mixing)
Impermeable to liquids and water vapors
Curing without shrinkage
Application thickness up to 30 mm in one layer
Application temperature range: +10 °C to +30 °C