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.


Proven over the years, Sikaflex Polyurethane is the product of choice in a wide range of construction applications. Polyurethanes exhibit many characteristics that offer advantages in certain applications. These characteristics are:


Sikaflex polyurethane sealants will bond to more surfaces, particularly porous substrates such as concrete and masonry, without the use of a primer. It is an accepted fact that Sikaflex polyurethane sealants have superior wetting action in achieving a bond to various joint substrates under jobsite conditions.

Substrate Staining

Sikaflex polyurethane sealants possess an extremely stable consistency and will not stain or discolor virtually any common substrate.

Water Immersion

Many Sikaflex polyurethane sealants can be placed in totally immersed environments without being affected by the action of the water.

Dirt Resistance

Because of their exclusive chemical design, Sikaflex polyurethane sealants exhibit far less dust and dirt pick-up during cure and over the lifetime of the building.


 Sikaflex polyurethane sealants can be treated with most coatings and paints without the risk of delamination.

Polyurethane Joint Sealant Application to Exterior of Building


Sikasil silicone sealants are the product of choice when specific characteristics are desired in a sealant. Typical conditions favoring the selection of Sikasil silicone sealants occur in glass-to-glass and glass-to-metal interface in glazing systems. Important characteristics include:


Excellent adhesion to glass including conditions subjecting the silicone sealant to reflected UV radiation at the bond line.

Color Retention

White and other light colors will not yellow with age, therefore the white silicone sealant will remain white.

Heat Resistance

Applications subjecting the silicone sealant to unusually high temperatures can often be sealed with Sikasil silicone sealant.

Silicone Joint Sealant Application to Exterior Window on Building


White tall building
Architectural Sealants

Section of a structural glazing assembly
Engineered Silicone & Structural Glazing

joint sealant being applied
Roadway Sealants


applying joint sealant in warehouse
Control Joint Sealants

joint sealant being applied
Specialty Joint System

chemical plant
Chemical Resistant Sealants

room with window
Pick-proof & Tamper Resistant Sealants
joint sealant being applied
Sealant Primers
Sealing window frame with Sika Boom expansion foam
Expanding Foam Sealants