Sikadur®-31 EF

• CE Marking and Declaration of Performance to 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 packaging in dry conditions at temperatures between +5 °C and +30 °C. Always refer to packaging.

Mixed resin ~1,95 ±0,1 kg/l

Value at +23 °C.

EN 1504-4: Structural bonding

*100 % concrete failure

Hardens without shrinkage

(linear expansion between -20 °C and +40 °C)

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

Part A : Part B = 3 : 1 by weight or volume

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 must 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.

+10 °C min. / +30 °C max.

+10 °C min. / +30 °C max.

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

+10 °C min. / +30 °C max.

Cementitious substrates must be dry or matt damp (no standing water).
Brush the adhesive well into the substrate if matt damp.

Potlife (200 g)

Measurements taken in adiabatic conditions

The potlife begins when Parts A+B 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 smaller quantities. Another method is to chill Parts A+B before mixing (not below +5 °C).

Sikadur®-31 EF may be overcoated with a Sika® compatible epoxy coating when adhesive has hardened

~1,95 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 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.

Polyester / epoxy / ceramics

Surfaces must be clean, dry, free from oil, grease and any other surface contaminants that could affect adhesion of the adhesive.

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.

Polyester / epoxy

Surfaces must be prepared by abrading using suitable equipment.

Ceramics

Surfaces must be prepared by abrading using suitable equipment. Do not apply to siliconised substrates.

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.

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 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 = 4,0 minutes. Mix only the quantity which can be used within its pot life.

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