Pro Clima TESCON EXTOSEAL® SILL Sealing Tape 150mm x 20m

Flexible Sealing for Complex Details

TESCON EXTOSEAL^® SILL is engineered to handle the challenging junctions where movement, irregular surfaces and multiple materials meet. Its highly flexible, extensible backing allows it to conform to corners, penetrations and uneven substrates, forming a watertight seal without stressing the connection.

The tape’s robust adhesive layer bonds securely to timber, membranes, masonry, concrete, metals and many rigid boards – often without the need for additional mechanical fixing.

Key Performance Benefits

Permanently Elastic & Extensible
Accommodates structural movement and thermal expansion without cracking or losing adhesion.

Extremely Strong Adhesion
Delivers reliable bonding to common construction materials including timber, masonry, concrete, metals and façade membranes. Suitable for use on slightly damp substrates depending on conditions.

Weathertight & Airtight
Provides dependable protection against wind-driven rain and uncontrolled air leakage when correctly installed.

UV & Weather Resistant
Designed for exterior use and capable of withstanding exposure during the construction phase.

Butyl-Free Technology
Offers long-term performance without the brittleness sometimes associated with traditional butyl tapes.

Versatile Detailing Solution
Ideal for sealing around penetrations such as pipes, cables and brackets, as well as complex façade junctions.

Typical Applications

TESCON EXTOSEAL^® SILL is suitable for:

• Sealing window and door perimeter connections
• Junctions between façade membranes and masonry or concrete
• Pipe, conduit and service penetrations
• Transitions between differing building materials
• Exterior airtight and weathertight detailing in high-performance construction

Confidence in Critical Connections

The most vulnerable areas of the building envelope are often its junctions and penetrations. TESCON EXTOSEAL^® SILL provides a flexible, durable sealing solution that maintains performance under movement and exposure – helping protect the structure from moisture and air infiltration over time.

With proven Pro Clima engineering, TESCON EXTOSEAL^® SILL supports robust, energy-efficient building envelopes built to last.