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.


The joint is where the different building elements and materials meet. A joint is where two components meet and occur mainly within segments of construction or at a part of an interface between two variants. Joint sealing facilitates construction as many components are made of different materials that need a joint to allow for movement of the structure but must keep water, air, heat cold and vapor-tight seal. As the most vulnerable part of a structure, the joint needs the best product to protect the structure from the environmental elements and only correctly specified and professionally applied high-quality joint sealants will manage to keep the building or structure sustainably airtight during its lifespan. Sika has a wide variety of joint sealant solutions that will suit all of your construction needs, browse our product lines to find which joint sealant is the solution for your next project!

Sealant Application Guide featuring the various sealants that Sika has to offer.


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