Seal Flex 500ml Water Based Adhesive Made From Acrylic

Stopped my well used inflatable dingy from constantly deflating. Very pleased.

Bought to seal a small leak in a 3D dinghy, near the floor seam so impossible to patch. Used as directed (and on advise from manufacture) but leak bubbled Sealflex for a day before we gave up, left it inflated in the sun for another day to dry the sealant and put the dinghy away in its bag for a few weeks. On re-inflating there were alarming crackles - assumably from stuck-down excess sealant we couldn’t tip out - but no damage done. We still have a pin-hole leak, but better than it was.

Very good: it sealed a leaking seam on my Yam inflatable boat that a professional company had twice attempted to repair without success using a patch. It has the consistency of water and you just pour it through the valve into the problem chamber with a small funnel. I actually unscrewed the valve with long nose pliers then refitted. There's a helpful video on youtube on how to use a similar product called toobseal that isn't available in the UK.It doesn't say how much to use but if your boat is less than 4m, I'd divide the quantity by the number of chambers as per tubeseal video, which will leave some spare if you are only doing one chamber. Otherwise, it will never dry and you'll have to drain some out when you are finished rolling your boat around to distribute it around the inside of the leaky chamber: it was hard work rolling a 3.6m boat around for 10 mins, then I did it again later after changing the air. You have to change the air regularly for it to dry because it is water based and the air inside wont take any more moisture. Actually, I am sure it is just a regular PVA adhesive like Unibond watered down to 50:50. Did the job tho.