Sikaflex Sealant Black, Polyurethane Sealant, High Elasticity & Vibration Resistance

Professional seal for maritime applications

Sikaflex-291i is a one-component polyurethane sealant specifically developed for use in shipbuilding. The non-sagging formula cures upon exposure to atmospheric moisture to form a permanently elastic material, providing a reliable seal even under heavy loads caused by vibration and weathering.

Versatile in boat and ship building

Whether indoors or outdoors, Sikaflex-291i is ideal for creating elastic joints and for bonding and sealing a wide variety of components. Thanks to its high flexibility and excellent adhesion, the joint remains permanently stable even under dynamic loads.

Strong adhesion to common materials

The adhesive strength is impressive on a wide range of marine materials, such as wood, metals, plastic composites (e.g., UP-GRP), and ceramic substrates. Even under changing climatic conditions, the bond remains reliable and durable.

Technically sophisticated and user-friendly

The stable consistency allows for both horizontal and vertical applications. The low-emission formula complies with modern environmental standards and is easy to process. However, it is important to avoid using it on plastics prone to stress cracking, such as PMMA or polycarbonate.

• High elasticity and vibration resistance
• Broad adhesion spectrum on maritime materials
• Suitable for indoor and outdoor applications

Sikaflex-291i meets the highest requirements in yacht and shipbuilding. Its durable formula ensures durable sealing and bonding, even under demanding environmental conditions. Thanks to its universal applicability and excellent material compatibility, this product is a proven standard in professional marine applications.