Godrej City Panvel 2

Location
Panvel

Product Used

1. Cobiflex tape/Expansion Joint
2. Sealant Sika Flex Construction”

Problem/ Issues Faced
Used for expansion joint.

Uniqueness of the product application
Cobiflex tape/Expansion- Joint Specialised Product. Results are better.
Sealant sika flex construction: PU Sealant, bonding purpose is good and better adhesion. “

Customer Feedback
10 years warranty so until now no any drawback from the product.

Application Procedure

1.Surface Preparation
Substrate Surface Preparation Is One Of The Most Important Criteria For Good Adhesion With Resin Systems Such As The Sikadur Epoxy Adhesives, Which Have Excellent Adhesion On Many Different Substrates Correctly Prepared As Follows:- Requirements for the substrate prior to preparation: Any weak or damaged concrete must be removed and any surface defects such as blowholes or voids must be fully exposed and repaired if required. Concrete and cement mortars must be older than 28 days (according to the minimum substrate strength requirements). Confirm the substrate strength (concrete, masonry, natural stone etc). If in doubt, make a test area first. The substrate surfaces must all be sound, clean and free from contaminants such as dirt, oil, grease, rust, existing surface treatments and coatings etc. All loose particles must be removed. The substrate must be dry or mat damp and free from any standing water, ice etc. If in doubt, make a test area first and confirm the bond strength with pull-off testing equipment.

2. Tape preparation
   If there is any dirt on the tapes clean their surface with a clean, dry or damp cloth. Use water and no solvents for this cleaning. Check the integrity of the Sikadur- Combiflex® SG Tapes to ensurethat there is no damage from storage and transport. Remove any damaged sections if necessary.          
3. Masking tape
   For installation on expansion joints or cracks > 1 mm the centre of the tape must not be “bonded” to the
   joint filler or substrate. In these situations, apply masking tape on top of the joint / crack and on both outer sides of the prepared joint / crack area before applying the adhesive.
4. Mixing
   Pre-batched units:
   Stir each component and then mix parts A+B together in the Part A tin for at least 2 minutes with a resin mortar mixing paddle attached to a slow speed electric drill (max.500 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 approx. 1 more minute at low speed to keep air entrapment at a minimum. Mix only that quantity which can be used within its pot life.
5. First layer of Sikadur® adhesive
   Apply the mixed Sikadur® adhesive on both sides of the joint / crack onto the prepared substrate using a suitable brush, trowel or spatula. If the concrete substrate is damp, force the adhesive firmly into the substrate. The thickness of this layer of adhesive should be 1 – 2 mm and the width on each side of the joint / crack at least 40 mm.
    
6. Sikadur-Combiflex® SG Tape application
   Apply the Combiflex SG tape within the open time of the adhesive. Press the tape firmly, without entrappin air, into the adhesive using a suitable roller. The adhesive should be squeezed out on both sides of the tape by ~ 5 mm. For expansion joints / cracks > 1 mm apply the Sikadur- Combiflex® SG 20 M Tape with the central  facing upwards. In situations with high joint movement, place the tape into the joint as a loop
7. Top layer of Sikadur® adhesive
   Let the first layer of the Sikadur®-adhesive stiffen and begin to harden before the top layer is applied. Apply the top layer of adhesive at a thickness of ~ 1 mm on both sides of the joint / crack, producing a fully covering layer which tapers outwards to almost zero.
8. Remove masking tape and central strip
   Remove the outer edge masking tapes, then remove the central masking tape to ensure a neat and precise detail.
9. Tape connections
   The Sikadur-Combiflex® SG Tape ends are connected by hot air thermal welding. The welding area must be prepared by abrading and roughening the surface with scotch-brite pads or sandpaper Roughen the tapes only in the welding areas otherwise their adhesive bond can be affected. All Combiflex SG Tape welded overlaps have to be 40 -50 mm
10. Hot air welding
    The Sikadur-Combiflex SG tape ends are connected by hot air thermal welding as follows: The welding area must be prepared by abrading and roughening the surface with scotch-brite pads or sandpaper. Roughen the tapes in the welding area only otherwise their adhesive bond can be affected. Overlaps to be 40 – 50 mm. Solvents such as Sika Colma Cleaner do not improve the welding properties.”