Sikadur®-31+

• Conforms with LEED v4 MR credit: Building product disclosure and optimization — Environmental Product Declarations (Option 1).

• Conforms with LEED v4 MR credit: Building product disclosure and optimization — Material Ingredients (Option 2).

• Conforms with LEED v4 EQ credit: Low-emitting materials.

• 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 EC1^PLUS.

• CE / UKCA marking and declaration of performance based on EN 1504-3 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 Products and systems for the protection and repair of concrete structures — Structural bonding.

• Complies with the general requirements of EN 1504-3: Class R4.

• Complies with the general requirements of EN 1504-4: Structural bonding for bonded plate reinforcement and bonded mortar or concrete.

Epoxy resin and selected fillers

24 months from date of production

The product must be stored in original, unopened and undamaged sealed packaging in dry conditions at temperatures between +5 °C and +30 °C.
Always refer to packaging.

Mixed resin (2.00 ± 0.1) kg/l.

Density value at +23 °C.

Compliant with VOC emission classification GEV-Emicode EC1^PLUS

* 100% concrete failure

Resistant to many chemicals. Contact Sika Technical Services for additional information.

Part A : Part B = 2 : 1 by weight or volume.

30 mm maximum

For non-structural adhesive or other applications, if layer thicknesses of >30 mm are required, apply in successive 30 mm layers once the previous layer has hardened and cooled. 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.

Beware of condensation.

Steel substrate temperature during application must be at least +3 °C above dew point.

Substrates must be dry or matt damp (no standing water).

Brush the adhesive well into the substrate if matt damp.

2.0 kg/m² per mm of thickness.

Note: Consumption data is theoretical and does not allow for any additional material due to surface porosity, surface profile, variations in level, wastage or any other variations. Apply product to a test area to calculate the exact consumption for the specific substrate conditions and proposed application equipment.

CONCRETE / MASONRY / MORTAR / STONE

Concrete and mortar must be at least 3–6 weeks 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.

IMPORTANT

Reduced adhesion performance

Surface contamination such as dust and loose material, including that caused during substrate preparation, can reduce Sikadur®-31+'s performance.

Thoroughly clean all substrate surfaces before application of Sikadur®-31+ by vacuum / dust removal equipment.

CONCRETE / MASONRY / MORTAR / STONE

Prepare substrates mechanically using suitable abrasive blast cleaning, needle gunning, light scabbling, bush hammering, grinding or using other suitable equipment to achieve an open textured, gripping surface profile.

STEEL

Prepare surfaces 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

Prepare surfaces by planing, sanding or using other suitable equipment.

IMPORTANT

Maintaining workability and handling time.

When using multiple units during application, do not mix the following unit until the previous one has been used.

PRE-BATCHED UNITS

1. Mix only the quantity which can be used within its pot-life.
2. Prior to mixing all parts, mix Part A (resin) briefly using a mixing spindle attached to a slow speed electric mixer (maximum 300 rpm).
3. 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.
4. To ensure thorough mixing, pour materials into a clean container and mix again for approximately 1 minute. Overmixing must be avoided to minimise air entrainment. Mix full units only. Total mixing time for Parts A+B = 4.0 minutes.

IMPORTANT
Provide temporary support for heavy components positioned vertically or overhead.

ADHESIVE

1. Apply mixed adhesive to the prepared surfaces with a spatula, trowel, notched trowel or by gloved hand.
2. For optimum adhesion apply adhesive to both surfaces that require bonding.
3. For heavy components positioned vertically or overhead, provide temporary support until Sikadur®-31+ has fully hardened / cured. Hardening and curing will be dependent on ambient temperatures.

REPAIR

1. Apply mixed adhesive to the prepared surfaces with a spatula, trowel or by gloved hand.
2. Use temporary formwork as required.

JOINT FILLING AND CRACK SEALING

1. Apply mixed adhesive to the prepared surfaces with a spatula or trowel.

Clean all tools and application equipment immediately after use with Sika® Thinner C. Hardened material can only be removed mechanically.