Sikaflex 591 sealant for marine applications, high elasticity, weather-resistant, environmentally friendly formulation - white, black, steel-grey

Universal sealant for maritime loads

Sikaflex®-591 was specially developed for demanding applications in the marine environment. Its innovative STP (silane-terminated polymer) technology combines high elasticity with exceptional weather resistance. This makes the sealant suitable for both exterior applications on boats and yachts and interiors with special requirements for flexibility and resilience.

High material compatibility and strong adhesion

With a broad adhesion spectrum, Sikaflex®-591 is compatible with numerous substrates, including metals, plastics, wood, and painted surfaces. Its permanent elasticity reliably compensates for movement and material stresses—a clear advantage in the face of fluctuating temperatures and mechanical stress at sea.

Optimized for comfortable processing

The sealant is easy to apply and smooths cleanly. Its long open time allows for precise work, even on larger projects. Furthermore, the material remains colorfast, ensuring a consistently uniform appearance—particularly beneficial for visible joints and finishing areas.

Environmentally conscious and safe recipe

Free of tin, isocyanates, phthalates, solvents, and PVC, Sikaflex®-591 meets modern environmental standards. This makes it a sustainable choice for anyone who demands uncompromising quality in their marine sealing work – without sacrificing safe ingredients.

• Extremely weather-resistant and UV-resistant
• Very good adhesion to a wide range of materials
• Environmentally friendly, low-pollutant composition

Sikaflex®-591 combines the highest technical performance with user-friendly application. Its versatility in use – both indoors and outdoors – and its robust resistance to marine influences make this sealant the ideal solution for a wide range of sealing and repair work in boat and yacht construction.