Sealing To Moving Concrete Cracks

I. TYPE OF DEFECTS
Type of defects: Non-structural and movable cracks.

II. SURFACE PREPARATION

• The cracks and adjacent substrate must be clean, sound and free of contaminated material. Remove dust, laitance, grease, curing compounds and other bond inhibiting materials from surface by mechanical means.

• “V” notch the surface of crack with mechanical router or hand chipping to maximum width of 8 mm and to minimum depth of 8 mm.

III. SEALING

• Material: Sikaflex Construction (J)

• To ensure the cleanliness of the substrate, use high pressure air compressor to clean the substrate from any dust and loose particle.

• In case there is possibility of the sealant adheres to the bottom of the joints then a backer rod with diameter min. 20 % bigger than the width of joint shall be applied.

• The application of Sika Primer 3 is recommended

• Gun Sikaflex Construction (J) into prepared crack to a minimum depth of 8 mm.

• Allow sealant to cure for at least 24 hours before the application of elastic water dispersed paint.