Sikadur®-31+ - Low-VOC Epoxy Adhesive
Verified by manufacturer 1 day ago
Low-VOC epoxy adhesive for structural bonding and concrete repair.
Application
For use as an adhesive for:
- Structural concrete repair (Principle 3, Method 3.1 of EN 1504-9). Repair of spalling and damaged concrete in buildings, bridges, infrastructure and superstructure works;
- Structural strengthening (Principle 4, Method 4.3 of EN 1504-9). Bonding plate reinforcement;
- Structural strengthening (Principle 4, Method 4.4 of EN 1504-9). Increasing the bearing capacity of the concrete structure by adding mortar.
For use bonding the following materials:
- Concrete;
- Natural stone;
- Ceramics;
- Fibre cement;
- Mortar;
- Brick masonry;
- Brick slips;
- Steel;
- Iron;
- Wood.
For use repairing and reprofiling:
- Structural concrete elements such as beams, columns, and walls;
- Non-structural concrete elements;
- Small patches and edges.
For use filling and sealing:
- Joint arrises;
- Crack arrises;
- Non-structural static cracks;
- Holes;
- Voids.
Description
Sikadur®-31+ is a two-part, low-VOC, moisture-tolerant epoxy structural adhesive which bonds to many construction materials. It is also used for structural concrete repairs, joint filling, and crack sealing. It can be used in both do-it-yourself (DIY) and professional applications.
Features and benefits:
- Easy to mix and apply.
- Very low VOC (GEV EMICODE® EC1PLUS).
- Very good adhesion to many construction materials.
- Very good initial and ultimate mechanical strength.
- Suitable for structural concrete repair, class R4 according to EN 1504-3:2005 (Structural and non-structural repair).
- Good adhesion to dry and matt damp concrete.
- Thixotropic: non-sag in vertical and overhead applications.
- No primer required.
- Good resistance to abrasion.
- Good resistance to specific chemicals.
- Differently coloured components for mixing control.
- Impermeable to most liquids and water vapour.
- Hardens without shrinkage.
- Application up to 30 mm thickness in one layer.
- Temperature application range 10–30°C.
Approvals/ standards:
- CE/ UKCA marking and declaration of performance based on EN 1504-3:2005 Products and systems for the protection and repair of concrete structures — Structural and non-structural repair.
- CE/ UKCA marking and declaration of performance based on EN 1504-4:2004 Products and systems for the protection and repair of concrete structures — Structural bonding.
Environmental information:
- Contributes towards satisfying Materials and Resources (MR) Credit: Building product disclosure and optimization — Environmental Product Declarations under LEED® v4.
- Contributes towards satisfying Materials and Resources (MR) Credit: Building Product Disclosure and Optimization — Material Ingredients under LEED® v4.
- Contributes towards satisfying Indoor Environmental Quality (EQ) Credit: Low-Emitting Materials under LEED® v4.
- Environmental Product Declaration (EPD) in accordance with EN 15804. EPD independently verified by Institut für Bauen und Umwelt e.V. (IBU).
- VOC emission classification GEV Emicode® EC1PLUS.
General information
Color | Grey Guidance for specification option: When mixed; components are white and dark grey. |
Material | Epoxy Other Guidance for specification option: Selected fillers. |
Shape | Formless |
Length | Bespoke |
Width | Bespoke |
Height | Bespoke |
Uniclass | |
CAWS | C42/310 Repair mortar |
Specification data - Concrete repair mortars
Classification data | |
Standard | To BS EN 1504-3 and BS EN 1504-4. |
Mortar type | Epoxy resin-based. Guidance for specification option: With selected fillers. |
Performance requirement class | R4. |
Colour | Concrete grey. Guidance for specification option: When mixed; components are white and dark grey. |
Density | Mixed resin: 2.00 kg/L ±0.1 kg/L. Guidance for specification option: Density value at +23°C. |
VOC content | Compliant with VOC emission classification GEV-EMICODE EC1 PLUS. |
Compressive strength | To EN 1504-3, Class R4. To EN 12190, ~75 MPa. Guidance for specification option: See manufacturer's literature for values based on curing time and temperature. |
Tensile strength | To EN ISO 527-2, ~20 MPa (cured for 7 days at 23°C). Guidance for specification option: See manufacturer's literature for values based on other curing times and temperatures. |
Shrinkage | To EN 12617-1, ~0.01%. To EN 12617-4, 3.0 MPa (restrained shrinkage/ expansion). |
Coefficient of thermal expansion | To EN 1770, 4.8 x 10-5 (±0.2 x 10E-5) 1/K. |
Modulus of elasticity | To EN ISO 527-2 (tensile), 9 GPa (7 days at +23°C). |
Elongation at break | To EN ISO 527-2, 0.3% (7 days at +23°C). |
Adhesion strength | To EN 12636 (tensile), pass. Guidance for specification option: See manufacturer's literature for values based on EN 12188 and EN 1542. |
Glass transition temperature | To EN 12614, 50°C. |
Thermal compatibility | Freeze and thaw to EN 13687-1, 3.00 MPa. Durability to EN 13733, pass. |
Chemical resistance | Resistant to many chemicals. Guidance for specification option: Consult manufacturer for details. |
Moisture resistance | To EN 12636, sensitivity to water: pass. |
Reaction to fire | To EN 13501-1: Class C-s1,d0; Class Bfl-s1. |
Technical characteristics, other | To EN 12615, shear strength: ~16 MPa. To EN 12188, shear strength: ~35 MPa (at 50°C); ~30 MPa (at 60°C); ~25 MPa (at 70°C). To EN 12188, lap shear strength: ≥60 MPa (at 50°C); ≥70 MPa (at 60°C); ≥80 MPa (at 70°C). |
Sustainability data
Material | Epoxy Other Guidance for specification option: Selected fillers. |
Literature
Sikadur®-31+
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