Sikadur®-31 DW

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 max.

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).

Brush the adhesive well into the substrate.

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.

IMPORTANT

Reduced adhesion due to surface contamination

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

1. 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

1. Prepare the substrate mechanically using a suitable technique.

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

1. Prepare the substrate mechanically using a suitable technique.

The substrate has a bright metal finish with a surface profile to satisfy the necessary tensile adhesion strength requirement.

WOOD

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

IMPORTANT

Poor workability and unfavourable handling time due to wrong mixing

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

PRE-BATCHED UNITS

1. IMPORTANT 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).
2. 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.

1. IMPORTANT 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.

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

BONDING

Preconditions

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

1. IMPORTANT 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.
2. For optimum adhesion apply the adhesive to both surfaces that require bonding.
3. For heavy components positioned vertically or overhead, provide temporary support until the Product has fully hardened.

REPAIR

Preconditions

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

1. IMPORTANT On damp prepared concrete substrates, always apply 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

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

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