Polyurethane sealants are used to seal joints in a wide variety of construction applications. Sikaflex® is Sika’s line of professional-grade polyurethane sealants that have outstanding adhesion compatibility, elasticity, durability, paintability and much more. Polyurethane sealants are able to bond to most surfaces, particularly porous substrates such as concrete and masonry. These sealants have a very high bond strength and are ideal in demanding applications. Check out the vast array of products in the Sikaflex® polyurethane sealant line below.


At the joint, the different building elements, materials and trades meet. A joint occurs where two components meet and may occur within an element of construction or at part of an interface between two elements. Joint sealing facilitates construction, as a number of components made of different materials are used. Joints allow for needed movement of the materials but must remain water, air, heat, cold and vapor tight. Avoid making mistakes where your building is most vulnerable to leakage – the joint. The building blocks of your construction - like the concrete slab, the glass facade element, the roofing membrane, the metal cover - generally do not let water, moisture or air enter the building or structure. It is at the joints where a building is weakest to leakage. Only correctly specified and professionally applied high-quality joint sealants will manage to keep your building or structure sustainably tight during its entire lifespan. 


Browse the images below to see where you can apply our selection of polyurethane sealants!

Watch our polyurethane sealant videos below!

Sikaflex 1c SL Teaser

Sikaflex Seal it Sooner

Sikaflex 2c NS Arctic Teaser

Sikaflex 1c SL in Action