Sikadur®-31 IN
2-part thixotropic structural epoxy adhesive
Sikadur®-31 IN is a solvent-free, moisture tolerant, thixotropic, two part structural adhesive and repair mortar, based on epoxy resins and special fillers, designed for use at temperatures between +10°C and +40°C.
- Easy to mix and apply
- Suitable for dry and damp concrete surfaces
- Very good adhesion to most construction materials
Usage
Structural adhesive for bonding:
- Concrete elements
- Hard natural stone
- Ceramics, fibre cement
- Mortar, Bricks, Blocks, Masonry etc.
- Steel, Iron, Aluminium
- Wood
- Polyester, Epoxy
- Glass
Fast setting repair mortar and adhesive for:
- Corners and edges
- Hole and void filling
- Joint arises
Joint filling and crack sealing:
- Rigid joint filling
- Crack filling and sealing (non moving)
Packaging
Part A : 2 kg, Part B : 1 kg | 3 kg x 2 sets |
Part A : 4 kg, Part B : 2 kg | 6 kg x 2 sets |
Part A : 20 kg, Part B : 10 kg | 30 kg x 1 set |
Advantages
- Easy to mix and apply
- Suitable for dry and damp concrete surfaces
- Very good adhesion to most construction materials
- High strength adhesive
- Thixotropic: non-sag and suitable for vertical and overhead application
- Solvent free
- Hardens without shrinkage
- Different coloured components (for mixing control)
- No primer needed
- High initial and ultimate strengths
- Good abrasion & Chemical resistance
- Adhesive and filler in one
- Impermeable to liquids and water vapour
Colour
Grey Paste
Product Details
APPROVALS / STANDARDS
Conforms to ASTM C 881, Type I, Grade 3 Class B+C
Chemical Base
Epoxy Resin
Shelf Life
12 months from date of production
Storage Conditions
Store properly in original unopened, sealed and undamaged packaging in dry conditions at temperatures between +5°C and +40°C. Protect from direct sun light.
Density
Part A+B Mixed : 1.80 ± 0.1 kg/L at 30°C
Compressive Strength
1 day | ≥ 45 N/mm2 |
| 3 days | ≥ 50 N/mm2 |
| 7 days | ≥ 55 N/mm2 |
14 days | ≥ 60 N/mm2 |
Values at temperature +30°C
Tensile Strength in Flexure
1 day | ≥ 10 N/mm2 |
3 days | ≥ 15 N/mm2 |
7 days | ≥ 20 N/mm2 |
| 14 days | ≥ 25 N/mm2 |
Values at temperature +30°C
Tensile Strength
3 days | ≥ 5 N/mm2 |
7 days | ≥ 8 N/mm2 |
Values at temperature +30°C
Tensile Adhesion Strength
≥ 10 N/mm2 (Concrete failure) | (ASTM C 882) |
Tested on Dry substrate after 7 days at +30°C
Shrinkage
Hardens without shrinkage
Application
Mixing Ratio
Part A : Part B = 2 : 1 (by weight)
Layer Thickness
30 mm max.
For non- structural adhesive or other applications, if layer thickness’s of >30 mm are required, apply in successive 30 mm layers or once the previous layer has hardened. The surface of the freshly applied intermediate layers should be scratched to form a key for subsequent layers. If layer application is to be longer than 2 days, the wet applied adhesive must be blinded to excess with quartz sand immediately after application.
Sag Flow
Non-sag up to 10 mm thickness on vertical surfaces | (ASTM D 2730) |
Product Temperature
+10°C min. / +40°C max.
Ambient Air Temperature
+10°C min. / +40°C max.
Dew Point
Beware of condensation!
Substrate temperature during application must be at least 3°C above dew point.
Substrate Temperature
+10°C min. / +40°C max.
Substrate Moisture Content
Cementitious substrates must be dry or matt damp (no standing water). Brush the adhesive well into the substrate if matt damp.
Pot Life
≥ 40 minutes (100g mass at +30°C) | (FIP 5.1) |
The potlife begins when the resin and hardener are mixed. It is shorter at high temperatures and longer at low temperatures. The greater the quantity mixed, the shorter the potlife. To obtain longer workability at high temperatures, the mixed adhesive may be divided into portions. Another method is to chill parts A+B before mixing them (not below +5°C).
Consumption
~2.0 kg/m2 per mm of thickness.
Consumption depends on the roughness and absorbency of the substrate. This figure is theoretical and does not allow for any additional material due to surface porosity, surface profile, variations in level or wastage etc.
SUBSTRATE QUALITY
Concrete / masonry / mortar / stone
Concrete and mortar must be at least 28 days old. Substrate surfaces must be sound, clean, dry or matt damp. Free from standing water, ice, dirt, oil, grease, coatings, laitance, efflorescence, old surface treatments, all loose particles and any other surface contaminants that could affect adhesion of the adhesive.
Steel
Surfaces must be clean, dry, free from oil, grease, coatings, rust, scale, all loose particles and any other surface contaminants that could affect adhesion of the adhesive.
Wood
Substrate surfaces must be sound, clean, dry and free from dirt, oil, grease, coatings, all loose particles and any other surface contaminants that could affect adhesion of the adhesive.
SUBSTRATE PREPARATION
Concrete / masonry / mortar / stone
Substrates must be prepared mechanically using suitable abrasive blast cleaning, needle gunning, light scabbling, bush hammering, grinding or other suitable equipment to achieve an open textured gripping surface profile.
Steel
Surfaces must be prepared mechanically using suitable abrasive blast cleaning, grinding, rotating wire brush or other suitable equipment to achieve a bright metal finish with a surface profile to satisfy the necessary tensile adhesion strength requirement. Avoid dew point conditions before and during application.
Wood
Surfaces must be prepared by planing, sanding or other suitable equipment.
All substrates
All dust and loose material must be completely removed from all substrate surfaces before application of the product by vacuum / dust removal equipment.
MIXING
Pre-batched units
Prior to mixing all parts, mix part A (resin) briefly using a mixing spindle attached to a slow speed electric drill (max. 300 rpm). Add part B (hardener) to part A and mix parts A+B continuously for at least 3 minutes until a uniformly coloured smooth consistency mix has been achieved. To ensure thorough mixing pour materials into a clean container and mix again for approximately 1 minute. Over mixing must be avoided to minimise air entrainment. Mix full units only. Mixing time for A+B = 4 minutes. Mix only the quantity which can be used within its pot life.
CLEANING OF TOOLS
Clean all tools and application equipment with Sika® Colma Cleaner immediately after use. Hardened / cured material can only be mechanically removed.