Expansion joints in concrete can be sealed with a variety of materials depending on project requirements and the type of joint. Below we will talk about the most common materials for sealing expansion joints.
Polyurethane mastics
Polyurethane mastics have good resistance to deformation and chemical attack. They are often used for expansion joints, especially in industrial or commercial building projects.
Polyurethane sealants
Polyurethane sealants are materials whose purpose is to seal joints for various purposes. Teknopoliderz 1K sealant can seal joints up to 35 mm wide. The elongation at break of the material is 800% and the tensile strength is 1.5 N/mm2.
Using a special sealant gun, sealing the seams will be very convenient and fast.
Channels and channel bands
These are special materials designed for sealing expansion joints. They are flexible and allow to compensate for deformations in concrete. Channel bars and channel bands are installed in expansion joints before concrete is poured.
Thermoplastic tapes
Thermoplastic tapes are an excellent material for sealing expansion joints with a wide range of applications. Such tapes are especially necessary for sealing seams in hydraulic structures, as they provide protection of seams from the effects of positive and negative water pressure, have high resistance to chemicals, and thermoplastic tape can be laid on wet surfaces.
We recommend paying attention to Teknomer thermoplastic tape, the characteristics of which you can find on our website.
Epoxy resins
Epoxy resins are highly durable and chemical resistant. They can be used to seal expansion joints in high stress or aggressive environments.
Cement mortars
In some cases, special cement mortars can be used to seal expansion joints. They provide good adhesion to concrete and can be further reinforced with reinforcing materials. But they will not be resistant to moisture and chemicals. substances, so their scope is quite small.
It is important to choose and apply the right expansion joint material to ensure good tightness, adhesion and ability to compensate for deformations in concrete. It is recommended to follow manufacturer's recommendations and building standards to achieve optimal results and ensure the longevity of the structure.
