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Selleys MarineFlex is a high performance adhesive sealant best suited for boats, pools and spas where a waterproof seal or bond is required.

It can also be applied and cured under water* so there's no need to drain any pool or spa. Compared to traditional polyurethanes it provides a more durable seal and bond with superior UV resistance.

  • Watertight/waterproof
  • Suitable for above and below waterline*
  • No primer required**
  • Shock absorbing and vibration dampening
  • Solvent-free and Isocyanate-free
  • Sandable and paintable
  • Weather/UV Resistant
  • Indoor/Outdoor
  • Non sagging


Can be used for bonding and sealing any of the below surfaces**, wet or dry.

It is formulated to deliver superior performance in demanding situations where conventional products fail.

This product cannot be used to repair flexible vinyl pool liners or inflatable pools.

** MarineFlex can be used on the following surfaces without a primer: Aluminium, galvanise steel,ceramic tiles, fibreglass/FRP, gelcoat^, polycarbonate, glass, and most plastics# (pre-test before use) Can be used on the following surfaces only when sealed/primed and painted: Timber and concrete.

*Critical seals/repairs underwater should be regularly checked & repaired if required

^Gelcoat must be lightly sanded prior to product application

# Not suitable for PE, PP, or PTFE, permanent water immersion or plugging leaks subject to pressure.


Technology Sil-X ™
Skin Time (23C/50%RH) Approx 40 minutes
Movement Capability N/A
Tensile Strength N/A
Shore A Hardness
Curing rate (23C/50%RH) Approx 3mm/24 hours

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