Types of Sealants Used in Construction

Types of Sealants

Silicone sealants for construction are one of the substantial elements to create a successful construction work and interior design. You must choose the ideal sealant to seal your space to prevent moisture and air penetration and to keep it energy efficient.

With so many sealants on the market that offer varying chemical and physical characteristics, choosing the right one for your construction project can be difficult.

Read further to learn in detail about the uses and benefits of silicone sealants

What is a Silicone Caulk?

A broad category of synthetic materials known as silicones includes silicone coatings, adhesives, sealants, and other products that can improve the functionality and durability of structures.

Silicone sealants used in construction are incredibly strong and can withstand deterioration brought on by moisture, sunshine, and harsh weather.

Ingenious engineering and architectural marvels like spectacular glass facades or curved and suspended buildings are made possible by silicones.

Clear silicone sealants are available for window glazing and joint sealing to help maintain proper design aesthtics. Silicone sealants are also available in a variety of other colours.

Why are Sealants Crucial in the Construction of Buildings?

Despite not always being adhesives, sealants contain adhesive properties. They can be used more flexibly when combined with substrates that have a variety of characteristics and have higher elongation and lower strength compared to adhesives.

Most Sealants Used in Construction are Used for

  • Creating a barrier to prevent the passage of other substances
  • Keep the required sealing qualities
  • The space between two or more substrates should be filled.

Sealants must be chosen carefully so they meet the bonding requirements of the substrate materials and are flexible enough to allow movement.

What are the Types of Sealants Used?

Sealants are differentiated by their viscosity, and they contain different types of chemicals. A high-viscosity sealant does not flow, whereas a low-viscosity sealant can penetrate through the substrate, where it is applied.

1.  Acrylic Sealants

What is Acrylic Sealant?

Acrylic sealants are a type of sealing compound often made from acrylic resins with a water basis.

They are made of sustainable materials and offer excellent defence against dust and bugs coming through different surface gaps.

Acrylic sealants are used for niche applications including PVC, aluminium and wood joinery, bathtubs, sinks, tiles, ceramics, etc.

Due to their paintability, acrylic sealants used in construction are great for both interior and exterior decoration. They are often called the painters caulk.

When it comes to the construction of building spaces, they are mostly used for caulking, jointing, and filling cracks.

What are Acrylic sealant’s purpose and usage?

An acrylic sealant prevents dust or insects from entering a surface; they can be applied to various surfaces and are generally flexible after painting.

In construction, they are used in joint filing, and they become like rubber when it is cured, in terms of property.

Due to its resistance to moisture and low or high temperatures, it can be used indoors as well as outdoors on a variety of materials.

In construction, it is commonly used to fill and seal cracks and gaps, expansion joints between prefabricated building elements, joinery made of wood, PVC, iron, and aluminium, plastered joinery, sealed joints, cladding roofs and facades with aluminium and Eternit.

B-751 Acryfill+ Silicone Sealant is a highly efficient, plasto-elastic one-component joint sealant based on acrylic dispersions. B-751 is a  paintable Acrylic Sealant suitable for sealing gaps and cracks, bonding bricks, glazing windows, installing sanitaryware, etc.

B-751 is perfect for environments where sound insulation is of the essence.

Explore our complete range of Acryfill Silicone Sealants.

  • Hybrid Sealant

What is Hybrid Sealant?

Hybrid sealants are known for their unique multi-sealant properties that come as a result of combining silicone sealants and polyurethane (PU) sealants.

The fusion produces a single-part, flexible sealant with many of the same positive properties as both – silicone & polyurethane – but with enhanced performance and durability.

What are Hybrid Sealant’s purpose and usage?

Hybrid sealants offer superior surface adherence without the requirement for a first primer. They provide a robust material with great strength and toughness that can be used for bonding and sealing properties.

Because hybrid sealants have a high solid content, they resist cracking and shrinking in adverse weather conditions.

This indicates that they offer more durable service and safeguard structures from moisture or air infiltration. Door thresholds, chimneys, filling seams between blocks, bricks, or concrete floors, and window re-glazing are examples of typical applications.

In terms of adhesion and effectiveness, Bondzil HYB sealants are the best hybrid sealants. They provide strong adhesion without primer and have a prolonged shelf life of a period of 12 months.

In addition to being crystal clear, Bondzil’s HYB Silicone Sealants are solvent-free and isocyanate-free. The sealants are also simple to use, have a wide range of sealing and bonding capabilities, and combine the strength of polyurethanes with the weathering resistance of silicones.

Check out our complete Hybrid Sealant Range.

  • Polyurethane sealant

What is Polyurethane Sealant?

PU sealants are single-component elastomers that cure at room temperature and humidity.

Polyurethane sealants have developed into the industry standard material for usage in a variety of applications throughout the years. A polyurethane sealant is created when glycol and an isocyanate are synthesised.

Due to their good elasticity and sealant strength on different surfaces, PU sealants are used in construction, automobile, marine sealing and for a wide variety of other purposes. PU sealants have good impact, vibration, and abrasion resistance

Several types of polyurethane sealants are currently available on the market.

  • Polyurethane construction sealant
  • Standard polyurethane sealant
  • Non-staining polyurethane sealant
  • UV-resistant polyurethane sealant

What are Polyurethane Sealant’s purpose and usage?

Since 10-ounce tubes of polyurethane sealant are the most common size sold, the most popular application method for sealing tight corners and seams with PU sealant is to use a caulking gun.

Polyurethane sealants can be used for a wide array of building projects, installations, repairs, and remodelling projects.

They are used to seal aluminium pipe joints in the HVAC industry as well as the joints of rainwater collection pipes on roofs and in gutters.

PU sealants are also used to insulate the joints between precast concrete blocks. Polyurethane construction sealants can also be utilized to seal aluminium pipe connections and insulate the gaps between concrete blocks.

PU sealants are also sturdy enough to be applied to the creation and setup of air conditioning systems.

  • Silicone Sealant

What is Silicone Sealant?

A strong, gel-like glue called silicone sealant, sometimes known as silicone caulk, is used in construction and home renovation.

They are frequently utilised in a variety of applications for both interior and exterior elements of a house or a building due to their flexibility and durability.

Several kinds of silicone sealants are developed for certain projects, just like there are with other adhesives.

Depending on the substance utilised, they are adaptable and highly effective sealants for buildings.

Typically, it has a gel-like appearance, texture, and behaviour. It is chemically distinct from other organic polymer-based adhesives.

While silicone remains stable and flexible in both high and low temperatures, other adhesives do not. Silicone sealant is additionally resistant to numerous chemicals, moisture, and ageing.

This reduces the possibility of failure when creating and sealing construction, marine, or automobiles.

What are Silicone Sealant’s purpose and usage?

Silicone sealants can be added to coatings because they increase resistance to salts, heat, alkalis, and acids.

Because silicone caulks also have high resistance against water, they are used in water-repelling construction projects like masonry and brickwork.

Many other types of building materials, including wood, metal, and vinyl, can now be easily adhered to with the help of construction silicone sealant. As a result, they improve a building’s energy efficiency by reducing the amount of air that is exchanged between the inside and outside.

Bondzil General Purpose Silicone Sealants are perfect for construction work. In a kitchen or bathroom, Bondzil silicone sealants are frequently used to seal the edge of sinks, sinks, showers, and bathtubs.

Our silicone sealants also stop mould from growing because they stop water from getting between various surfaces. Also, they are easy to clean.

You may select a sealant that will exactly match the décor you desire because Bondzil General Purpose Silicone Sealants are available in several colours.

For example- if you require a silicone sealant to seal a facade’s glasses you might want to choose a clear silicone sealant in order to maintain the facade’s look.

Our general-purpose silicone caulks function as a long-lasting defence against the elements since they retain their flexibility despite the passage of time and the high temperatures to which they may be exposed.

They also make an excellent caulk for sealing appliances like stove hoods, dryer outlets, outdoor faucets, or air intakes that flow through masonry walls.

Check out our complete range of General Purpose Silicone Sealant.


In conclusion, it should be noted that you must select sealants for construction as per your construction needs.

But, no matter what sealing problem you are facing during your construction project, Bondzil silicone sealants offer solutions for all. Our sealants are high in performance and durability.

To learn more about our versatile products, browse the Bondzil product range on our website or contact our sealing experts.

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