Sikadur-Combiflex®-933

Approved for use in contact with potable water under:

• Regulation 31(4) (a) of the water supply (water quality) regulation 2016 for England and 2018 for Wales.
• Approved by Energy and Climate Change Directorate Drinking Water Quality Division, under Water Supply (Water Quality) (Scotland) Regulations 2014, 33(3)(a).
• Approved by the Department of Agriculture, Environment and Rural Affairs under Regulation 30 of the Water Supply (Water Quality) Regulations (Northern Ireland) 2017.

IMPORTANT NOTE

Specific instructions for use (IFU) for potable water applications must be followed and are available upon request. For all other applications follow the guidance within this technical data sheet.

2-part epoxy

12 months

Store in unopened, original packaging, protected from moisture and direct sunlight.

1.4 kg/L

For use with Sikadur Combiflex®-930 bandage

≥3 N/mm²

1-2 mm

≥5 °C

Do not apply to frozen substrates

30 minutes at 20 °C

Full hardening of Sikadur-Combiflex®-933 adhesive is generally achieved after 2 to 3 days, dependent upon the ambient temperature.  For information on return to service times for potable water applications please refer to Further Documentation.

Concrete and masonry surfaces should be mechanically abraded to maximise adhesion. It is essential that all surfaces are clean, free from dust, oil, grease and any other contaminants that may affect the adhesion adversely. All metal surfaces should be abrasive blasted to SA2½. Prepare an area of substrate around the joint or crack allowing at least 25 mm to either side of the bandage to be applied. Joints or cracks in concrete, brick or block subject to active water ingress must be prepared and repaired with a suitable rapid setting Sika repair material. Damaged concrete should be repaired with a suitable Sika repair mortar. Allow time for the repair products to cure before proceeding to the next stage. Masking the crack or joint For cracks or joints of less than 25mm in width apply a 25mm wide masking tape. For designed joints of more than 25mm in width masking tape is not always required, in which case the Sikadur® Combiflex®-933 adhesive is applied up to the edge of the joint. In all cases the edges of the de-bonded area should be straight and parallel. Masking the outer edges of the crack or joint. Apply the masking tape to allow a minimum of 5 mm to either side of the Sikadur-Combiflex®-930 bandage.

Use suitable paddle mixer in a slow speed drill to mix Sikadur-Combiflex®-933 Part B (hardener) for 30 seconds, before adding to Sikadur-Combiflex®-933 Part A (resin) and mix for a minimum of 2 minutes until a homogenous mixture of a uniform grey colour is achieved, which should happen within four minutes.  Do not part mix; the materials have been correctly packaged to the proportions required. As with all epoxy resins, an exothermic reaction between the two components generates heat.  It is essential, therefore, to use the mixed material as soon as possible.

Immediately after use all tools and equipment can be cleaned using a suitable solvent as hardened adhesive can only be removed mechanically. Please note the solvent should not be used in a confined space or where spillages could come into contact with potable water. In reservoir applications, wipe with a clean, lint-free cloth and potable water only; repeat as necessary.