Construction - Construction materials - Putties and adhesives - Silicones and sealants

Silicones and sealants are flexible sealing materials used to fill cracks, joints and seams in various construction and repair situations. They provide protection against moisture, air, dust and temperature fluctuations, which helps to improve the durability and energy efficiency of structures. Depending on the composition and application, they can be based on silicone, acrylic, polyurethane or hybrid polymers.

Silicone sealants are the most widely used, as they provide high elasticity, water resistance and long service life. They are particularly suitable for wet rooms, such as bathrooms and kitchens, as well as outdoor conditions, as they are resistant to UV radiation and temperature changes. Silicones are available in neutral and acetic acid formulas - neutral silicones are suitable for metal, plastic and natural stone, while acetic silicones adhere better to glass and ceramic surfaces.

Acrylic sealants are a more economical alternative that is often used in dry interior applications, such as filling cracks and wall joints before painting. They are paintable, but are not as flexible and moisture-resistant as silicone sealants. Polyurethane sealants are more durable and provide good mechanical resistance, which makes them suitable for industrial and outdoor construction. Hybrid polymer sealants combine the best properties of different materials, offering high flexibility, adhesion and resistance to extreme conditions.

The correct selection and application of the sealant is essential to ensure a sustainable seal. Before application, the surface must be clean and dry, and the sealant must be applied in an even layer using a special gun. After application, it can be smoothed with a damp finger or a special tool to ensure a smooth and precise seam.

What is the difference between silicone, acrylic and polyurethane sealants?

Can silicone sealant be painted?

How to apply sealant correctly so that it lasts longer?

How to choose a sealant for wet rooms or outdoor work?

Do sealants provide heat and sound insulation?

How long does the sealant dry and when does it reach full strength?