Scope of workApplication of reliable joint sealing system composed of high elastic Hypalon membrane and high performance epoxy adhesive.
MATERIALS
Sikadur Combiflex a high performance joint sealing system for irregular or high movement joints, based on Hypalon flexible sheeting and epoxy resin based adhesive.
Sikadur 731 : a solvent free 2-component adhesive and repair mortar based on a combination of epoxy resins and specially selected high strength fillers.
SURFACE PREPARATION
- The concrete surface should be free from dust, oil, grease, laitance or loose particles
- Steel surface should be free from rust, oil and any loose particles. Preparation by sandblasting or grinding is required
APPLICATION
- Remove transparent separation foil of Sikadur Combiflex strip. Activate Sikadur Combiflex strip on both sides with Sika Thinner C, using rag saturated in Sika Thinner C. Wipe thoroughly. Leave to dry for at least 1 hour and max. 8 hours.
- Mix component A and B of Sikadur 731 using slow speed drill until homogeneous mixture is achieved. Apply properly mixed Sikadur 731 on both sides of joint (properly prepared) using trowel or tooth comb. Layer thickness 1 – 2 mm, width (on each side) at least 40 mm.
- The center of the strip may under no circumstances be glued to the substrate.
- Apply Sikadur Combiflex strip by pressing into the fresh applied epoxy adhesive. The red-middle tape is faced upwards.
- Let the base layer of the Sikadur 731 to harden first before the top layer is applied. If necessary activateSikadur Combiflex strip again before applying Sikadur 731 on both top sides at a thickness of approx. 2 mm, producing a cover which tapers to almost zero.
- Remove the red middle strip.
OVERLAPS
- Overlap shall be about 40 – 50 mm.
- New tapes are connected by hot air through thermal welding. This will be assisted by simultaneously applying Sika Hypalon Solvent
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