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On Wed, 25 Aug 2004 03:48:33 -0400, KenCo wrote:
===Mike wrote: === I have a small preformed pond that has split. I sealed it with === silicone but the leak is back and the split a little larger. Is there === an easy way to seal the tear? === === thanks === === ===scuff it a bit and use clear hot glue You can get a cheap plastic welding kit from Harbor freight. Its not all that hard to use. Most tubs are a PP or PE type plastic, and readily repairable by usiing the plastic welder. You will need a compressed air source to use it, so that in and of itself may not be feasible if you do not have a compressor. Not much sticks to PE or PP type plastics other than the same type material melted into the hole. Hot glues, epoxie and silicones will all eventually start leaking again if used solely by themself, due to the nature of the material the preform is made of. Its naturally slick and most solvents do not dissolve it, and its slickness even if scuffed up still fails to hold most sealers sufficiently. Besides water pressure will flex the seal and probably cause it to reopen, so it really requires a patch over the split to constrain the split.. You could get a like material (lots of items are made of these type materials, plastic buckets, kiddie pools, basins, etc etc ) and make a patch for it, and use silicone between the patch and the preform for a sealer, and use blind rivets or small stainless steel fasteners or even nylon fasteners to secure patch to preform, but its going to require removing the preform if you use fasteners other than blind rivets (pop rivets) which are available in stainless steel. Just be sure to coat the blind rivet with silicone before inserting in hole and give it a dollap or silicone after its installed so it does not weep water out of the hole the pulling stem swells up into. If you decide to try and patch it, drill a small hole of approximately 1/16" or 5/32" inch in diameter directly at the both ends of the crack. This will stop any stresses from making the crack grow any longer. Overlap your split by a minimum of 3/4" on all sides. I have 55 gal PP & PE drums sealed with pop rivet patches that have been leak free for years. I have used patch kits for an RV storage tank, available at any camping place, which are relatively cheap. They have some reinforcement fiber patches used with epoxy which might work for your situation. |
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