Sikadur®-31 DW

• WRAS, UK: Approval for use with Sikadur-Combiflex SG, approval number 1708503
• Sikadur®-31 DW follows the requirements of EN 1504-4 as adhesive for structural bonding

Epoxy resin

24 months from date of production

Store in original, unopened, sealed and undamaged packaging in dry conditions at temperatures between +5 °C and +30 °C. Protect from direct sunlight, heat and moisture.

Please consult the Sikadur®-Combiflex® System product data sheet for all applications with this system.

*100 % concrete failure

Hardens without shrinkage.

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

30 mm max.
When using multiple units, one after the other. Do not mix the following unit until the previous one has been used in order to avoid a reduction in handling time.

Sikadur®-31 DW must be at a temperatures of between +10 °C and +30 °C for application.

+10 °C min. / +30 °C max.

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

+10 °C min. / +30 °C max.

Substrate must be dry or mat damp (no standing water)
Brush the adhesive well into the substrate

*200 g

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 components A + B before mixing them (not below +5 °C).

Mortar and concrete must be older than 28 days (depends on minimal requirement of strengths).
Verify the substrate strength (concrete, masonry, natural stone).
The substrate surface (all types) must be clean, dry or mat damp (no standing water) and free from contaminants such as dirt, oil, grease, existing surface treatments and coatings etc.
Steel substrates must be de-rusted similar to Sa 2.5.
The substrate must be sound and all loose particles must be removed.

Concrete, mortar, stone, bricks:
Substrates must be sound, dry or mat damp (no standing water), clean and free from laitance, ice, standing water, grease, oils, old surface treatments or coatings and all loose or friable particles must be removed to achieve a laitance and contaminant free, open textured surface.

Steel:
Must be cleaned and prepared thoroughly to an acceptable quality i.e. by blast cleaning and vacuum. Avoid dew point conditions.

Pre-batched units:
Mix components A + B together for at least 3 minutes with a mixing spindle attached to a slow speed electric drill (maximum 300 rpm) until the material becomes smooth in consistency and a uniform grey colour. Avoid aeration while mixing. Then, pour the whole mix into a clean container and stir again for approximately 1 more minute at low speed to keep air entrapment at a minimum. Mix only that quantity which can be used within its potlife.

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