MarineFlex high performance adhesive sealant can be used on boats, pools & spas, where you need a waterproof seal or bond, even under water* It can be applied & will cure under water – no need to drain your pool or spa. Compared to traditional polyurethanes it provides a more durable seal & bond with superior UV resistance.


  • Salt, fresh & chlorinated water (pools/spas)^
  • Above and below waterline
  • No primer required
  • Shock absorbing & vibration dampening
  • Solvent & isocyanate-free
  • Sandable when fully cured
  • Powered by Sil-X advanced polymer technology
  • 10 year water tight seal guarantee above the waterline**
  • *Critical seals/repairs underwater should be regularly checked and repaired if required. Not for polycarbonate and perspex underwater.
  • ^With typical levels of chlorination

Related Products

Selleys Fibreglass Fix Repair Kit

Selleys Fibreglass Fix Repair Kit is an impact resistant polyester resin which can withstand water, weather and marine growth. When set it can be sanded and painted.

Selleys Fix&Go Shoe Repair

Selleys Fix&Go Shoe Repair is a strong, flexible, weather and impact resistant adhesive that is ideal for most shoe repairs.

Selleys Liquid Nails Landscape

Selleys Liquid Nails Landscape is a premium grade, high strength construction adhesive that delivers a weather resistant, high strength bond, making it ideal for many landscaping projects.

How to Guides

How To Create A Chopping Board

Keep on trend and learn how to create a stunning chopping board for serving which will be the envy of your friends at your next dinner party.

How To Fix A Splashback To A Wall

Sticking a splash back in a kitchen is a great way to improve the aesthetics of the kitchen. Selleys make the job easier with this step by step guide.

How To Makeover Your Kitchen In An Afternoon

The kitchen is the heart of every family home, but over time – cooking spills, kids, clutter can leave it looking a little tired. Here are some simple steps to giving it a refresh

How To Seal A Kitchen Splashback

Sealing your splashback is the final step to installing a splashback and perhaps the most important! It's super easy to do with Selleys silicone sealant.