Sikaflex® Construction Sealant

Avoid exposure to high levels of chlorine (maximum continuous level is 5 ppm of chlorine).

White colour tends to yellow slightly when exposed to ultraviolet light.

Since system is moisture-cured, permit sufficient exposure to air.

Avoid contact with materials or surfaces impregnated with, or containing, oil, asphalt, tar, or bituminous substances. Don’t cure in the presence of uncured silicone sealants, alcohol, and other solvent cleaners.

Sikaflex® Construction Sealant can be painted over with water, oil- and rubber-based paints.

When over-coating with water-, oil- and rubber- based paints, compatibility and adhesion tests are essential.

Allow at least seven (7) days for sealant to cure under stated conditions when using Sikaflex® Construction Sealant in total water immersion situations or prior to painting.

Proper sealant dimensions for moving joints are 2:1 width to depth ratio, with a recommended 6 mm (1/4 in) minimum and 13 mm (1/2 in) maximum depth of sealant. For nonmoving joints, the width to depth ratio can vary.

The maximum depth of sealant in horizontal joints subject to traffic is 13 mm (1/2 in).  

For best performance, Sikaflex® Construction Sealant should be gunned into joint when joint slot is at mid-point of its designed expansion and contraction. Recommended application temperature is between +4 and +38 °C (39 and 100 °F). For cold-weather application, store sealant at approximately +21 °C (70 °F) and remove just prior to using. Ensure joint is clean sound, dry, and frost-free before sealing. Install with hand or power operated caulking gun. Cut plastic tip on cartridge to desired joint size. Puncture airtight seal at base of tip. Place nozzle of gun into bottom of joint and fill entire joint. Keeping the nozzle deep in the sealant, continue with a steady flow of sealant preceding nozzle to avoid air entrapment. Also, avoid overlapping of sealant since this also entraps air. Tool sealant when wet to compact and ensure contact with joint walls, produce the required finish, and achieve a correctly dimensioned seal.

Priming is not usually necessary. Most substrates only require priming if testing indicates a need or where sealant will be subjected to water immersion after cure. Consult Sikaflex® Primers Product Data Sheet for additional information.

All joint surfaces must be clean, sound, dry and frost-free. Joint walls must be free of oils, tar, asphalt, bitumen, grease, paints, coatings, sealers, curing compound residues, and any other foreign matter that might prevent adhesion. Ideally this should be accomplished by mechanical means.

Sikaflex® Construction Sealant is suitable for vertical and horizontal joints. 

Linear Metre of Sealant per Litre

The application temperature should be between +4 and +38 °C (39 to 100 °F).The  Sealant should be installed when the joint is at the mid-range of its anticipated movement.

For cold-weather application, store sealant at approximately +21 °C (70 °F)