Sikaflex®-591

Multifunctional sealant for marine applications Sikaflex®-591 is a sealant based on Sika’s Silane Terminated Polymer (STP) technology. With it’s excellent resistance against the harsh maritime weathering conditions it can be used for a wide range of applications. Sikaflex®-591 exceeds common environmental and safety standards and sets a new benchmark from an ecological point of view. Sikaflex®-591 meets the low spread flame requirements (FTP Code Part 5) set out by the International Maritime Organization (IMO). 

  • IMO approved
  • Exceeds EH&S standards
  • Free os isocyanate, solvents, PVC, phthalates and tin catalysts
  • High elastic
  • Excellent weathering stability
  • Very good processing and tooling characteristics
  • Bonds well to a wide variety of marine substrates

Usage

Sikaflex® -591 is a multipurpose sealant designed for marine applications. It is suitable for elastic,vibration-resistant joint seals for a wide variety of interior and exterior sealing applications. Sikaflex® -591 bonds well to substrates commonly used in the marine industry. Sikaflex® -591 is not suitable for applications with teak wood and plastics that are prone to stress cracking (e.g. PMMA, PC, etc.). This product is suitable for experienced professional users only. Test with actual substrates and conditions have to be performed to ensure adhesion and material compatibility.

Advantages

  • IMO approved
  • Exceeds EH&S standards
  • Free os isocyanate, solvents, PVC, phthalates and tin catalysts
  • High elastic
  • Excellent weathering stability
  • Very good processing and tooling characteristics
  • Bonds well to a wide variety of marine substrates

FAQ

How to bond a rub rail?

You will find different variations and materials for rub rails such as GRP, paints, wood and moulded PVC, etc. Therefore a good surface preparation is key. Products needed depending on the rub rail material to be bonded.

To ensure a good final result follow the advice given in the pre-treatment chart. Common product for rub rail bonding is our assembly adhesive for marine Sikaflex®-292i or the STP based marine sealant Sikaflex®-591.

For further details read our application guidelines and our pre-treatment chart.

Posted on: 12/11/2019
How to install hatches and fittings on a boat?

Winches, windlasses are subject to high mechanical stresses, fans, hatches and hatch covers to low stresses. To make sure your fittings are sealed strongly we recommend the following:

Bedding and sealing of fittings subject to high mechanical stresses

Deck fittings such as chain plates, winches and guide rollers must absorb very high dynamic stresses. For this purpose, a high-performance product, Sikaflex®-292i, our assembly adhesive, should be used in conjunction with additional mechanical fixings.

Bedding and sealing of fittings subject to minimal mechanical stresses

Deck fittings, such as ventilators and cover strips, need to be waterproofed but are not subject to high tensile or torsion stresses.

These fittings can be effectively bedded and sealed with only Sikaflex®-291i or if the joint remains visible and is exposed to weathering, then use Sikaflex®-591 or Sikaflex®-295 UV.

Check pre-treatment chart for surface preparation of substrates prior to application and follow application steps according to application guidelines.

For further details read our application guidelines and our pre-treatment chart.

Posted on: 12/11/2019