Sikadur®-31 DW

• 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.

• Environmental Product Declaration (EPD) in accordance with EN 15804. EPD independently verified by Institut für Bauen und Umwelt e.V. (IBU).

• CE marking and declaration of performance based on EN 1504-4:2004 Products and systems for the protection and repair of concrete structures — Structural bonding.
• Water Regulations Sikadur Combiflex SG Jointing System, using Sikadur 31DW, Approval No. DWI 56.4.94.

• Adhesive for Waterproofing System ÖNORM B 5014 Test 1, Sikadur®-31 DW, OFI Techn.

• Migration Analysis RD 118/2003, Sikadur®-31 DW, O.T.E.C., Test report No. 0761415488.

• Drinking water approval ASC, CARSO.

EN 1504-4: Structural bonding

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.

Refer to the current Safety Data Sheet for information on safe handling and storage.

Refer to the Sikadur-Combiflex® SG System product data sheet.

Hardens without shrinkage

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

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. 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.

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

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

~2.0 kg/m2 per mm of thickness
This figure is theoretical and does not allow for any additional material due to surface porosity, surface profile, variations in level or wastage, etc.

CONCRETE, MASONRY, MORTAR, STONE

Concrete and mortar must be at least 28 days old.

Substrates must be sound, clean, dry or matt damp but free of standing water. Substrates must be free of contaminants such as ice, dirt, oil, grease, coatings, laitance, efflorescence, surface treatments and loose friable material.

STEEL

Surfaces must be sound, clean, dry and free of contaminants such as dirt, oil, grease, coatings and loose friable material.

WOOD

Surfaces must be sound, clean, dry and free of contaminants such as dirt, oil, grease, coatings and loose friable material.

Surface contaminants such as dust and loose material, including the contaminants generated during substrate preparation, can reduce the Product's performance.

Before applying the Product, clean thoroughly all substrate surfaces using vacuum or dust removal equipment.

CONCRETE, MASONRY, MORTAR OR STONE

Suitable techniques for substrate preparation include the following:

• Abrasive blast cleaning

• Needle gunning

• Light scabbling

• Bush hammering

• Grinding

Prepare the substrate mechanically using a suitable technique giving the substrate has an open-textured, gripping surface profile.

STEEL

Suitable techniques for substrate preparation include the following:

• Abrasive blast cleaning

• Rotating wire brush

• Grinding

Prepare the substrate mechanically using a suitable technique giving the substrate a bright metal finish with a surface profile to satisfy the necessary tensile adhesion strength requirement.

WOOD

Prepare the substrate by planing, sanding or using other suitable equipment.

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

PRE-BATCHED UNITS

Mix full units only. Prior to mixing all parts, mix part A (resin) briefly using a mixing spindle attached to a slow-speed electric mixer (max. 300 rpm).

Add part A to part B (hardener) and mix parts A+B continuously for at least 3 minutes until a uniformly coloured smooth consistency mix has been achieved.

Do not overmix. To ensure thorough mixing, pour materials into a clean container and mix again for approximately 1 minute. Mixing time for A+B = 4 minutes.

IMPORTANT

Damage due to unsupported heavy components applied vertically or overhead

Full adhesion is not achieved before the Product has fully hardened. Hardening depends on ambient temperatures. Unsupported heavy components might fall down when not supported.

Provide temporary support for heavy components until the Product has fully hardened.

BONDING

Prior to application confirm dew point conditions before and during application.

On damp prepared concrete substrates, always apply the Product by brush and work the Product well into the substrate. Apply the mixed adhesive to the prepared surfaces with a spatula, trowel, notched trowel or by gloved hand.

For optimum adhesion apply the adhesive to both surfaces that require bonding.

For heavy components positioned vertically or overhead, provide temporary support until the Product has fully hardened.

REPAIR

Prior to application confirm dew point conditions before and during application.

On damp prepared concrete substrates, always apply the Product by brush and work the Product well into the substrate. Apply the mixed adhesive to the prepared surfaces with a spatula, trowel or by gloved hand.

JOINT FILLING AND CRACK SEALING

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

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