wild violet 38 Posted September 13, 2017 Share Posted September 13, 2017 Is sika flex ok to seal my watertank lid down or is there a better product Quote Link to post Share on other sites
Island Time 1,252 Posted September 13, 2017 Share Posted September 13, 2017 a rubber gasket is better - with sika, it wont be easy to get the hatch off. And you will need to get it off if you sika it down, murphys law. Quote Link to post Share on other sites
wheels 543 Posted September 13, 2017 Share Posted September 13, 2017 Or you can use Silicon or Sika in this way. Run a decent bead all the way around. Make sure you circle every screw hole, right to the edge around each hole. Then allow it to dry fairly well. But before it is fully cured, then screw down the hatch.The sealant will squash out in shape, but won't ahere to the Lid. So it acts like a rubber seal. Quote Link to post Share on other sites
wild violet 38 Posted September 13, 2017 Author Share Posted September 13, 2017 Thanks guys Quote Link to post Share on other sites
w44vi 17 Posted September 14, 2017 Share Posted September 14, 2017 One thing I would add to wheels post is I would use a neutral cure silicone that has no anti fungal added, sealant suitable for fish tanks, acetoxy silicones can on certain metals can cause corrosion Quote Link to post Share on other sites
wheels 543 Posted September 14, 2017 Share Posted September 14, 2017 Good point. i should have asked what the tank was made from. I assumed GRP. Quote Link to post Share on other sites
wild violet 38 Posted September 14, 2017 Author Share Posted September 14, 2017 Its a steel keel tank with a steel lid would sikaflex still be ok have used on other fittings and havent noticed any corrosion Quote Link to post Share on other sites
wheels 543 Posted September 14, 2017 Share Posted September 14, 2017 Yep it would be fine. I imagine the Steel is coated in something anyway. Quote Link to post Share on other sites
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