DREXLER Siliconized Sealant (Mastic)

Acrylic-Based Insulation with High Flexibility

DREXLER Siliconized Sealant (Mastic) is a premium-quality, one-component acrylic-based sealant enhanced with silicone additives for superior flexibility and adhesion. Specially formulated for sealing and insulating various construction elements, this water-based product combines the workability of acrylics with the resilience of silicone, offering a durable, elastic, and weather-resistant solution.

Ideal for use in interior and exterior construction, renovation, or prefabricated building systems, this sealant ensures excellent joint movement accommodation, long-term sealing, and smooth finishing. DREXLER Siliconized Sealant is paintable after curing and can be used in a variety of joints that are exposed to moderate movement.

Applications

DREXLER Siliconized Sealant (Mastic) is suitable for a wide variety of construction, repair, and insulation applications, thanks to its high elasticity and versatile adhesion. Key uses include:

Sealing at the intersection of different frame materials and plaster (e.g., window and door frames) –

Insulating corners and joints in masonry and concrete structures –

Filling the gaps between prefabricated construction elements, including walls, ceiling panels, and modular partitions –

Providing flexible insulation for moving parts of construction materials, where moderate expansion and contraction are expected –

General-purpose joint sealing in interior drywall, concrete joints, and wooden elements –

Thanks to its balanced acrylic-silicone formulation, the sealant adheres perfectly to most construction surfaces and resists cracking and shrinking over time.

Surfaces

To ensure maximum adhesion and performance, prepare all surfaces according to the following guidelines:

Surfaces must be completely dry, clean, and free from dust, grease, or loose particles –

Remove any old sealant or paint residues before application –

For porous or highly absorbent materials, it is recommended to use a suitable primer to enhance bonding strength –

Compatible with plaster, concrete, brick, wood, metal, painted surfaces, and prefabricated panels –

Proper surface preparation is essential to achieving a reliable, long-lasting seal.

Color

DREXLER Siliconized Sealant (Mastic) is available in standard neutral colors, designed to fit common building and repair aesthetics:

White – for clean, seamless finishes in living spaces, kitchens, and sanitary areas –

Black – ideal for industrial, modern, or high-contrast applications such as metal joints and exterior paneling –

These color options allow for easy blending with most building materials and paint systems.

Storage

To maintain the shelf life and quality of DREXLER Siliconized Sealant, proper storage is essential:

Store the product away from water, frost, and extreme weather conditions –

Keep containers on wooden pallets in a cool, dry, and shaded environment –

Once opened, the sealant must be used immediately to prevent drying in the nozzle or packaging –

Do not stack more than six layers of product to avoid packaging deformation –

Since this is a water-based product, it must be protected from freezing, which could render it unusable –

Under the recommended storage conditions, the product remains effective for up to 18 months from the manufacturing date –

Correct handling and storage ensure long-term usability and consistent performance on the job site.

Safety

As with all chemical construction products, following safety instructions while using DREXLER Siliconized Sealant is crucial:

Keep out of reach of children –

During application, avoid unnecessary contact with skin and eyes –

In the event of eye contact, rinse immediately with plenty of clean water and seek medical advice if irritation persists –

Use the product in well-ventilated environments to minimize prolonged inhalation of any vapors, even though it is water-based –

Do not ingest or allow the uncured sealant to come in contact with food or food-preparation surfaces –

By following these precautions, users can ensure a safe working environment while enjoying the product’s high performance.

Why Choose DREXLER Siliconized Sealant (Mastic)?

Siliconized acrylic formula ensures flexibility, durability, and resistance to cracking –

Suitable for interior and exterior applications in residential and commercial buildings –

Excellent adhesion to various construction materials, including porous and non-porous surfaces –

Paintable after curing and compatible with most water-based paints –

Available in white and black, making it suitable for modern, clean, or industrial-style finishes –

Water-based, eco-friendlier option compared to solvent-based sealants –

Whether you’re a construction professional, contractor, or DIY renovator, DREXLER Siliconized Sealant offers dependable performance and easy application, backed by the trusted DREXLER quality.