How to repair a cracked water tank

adhesiverepair

I have a rowing machine (a WaterRower) with a water tank (picture). The tank has a few cracks on the top. I'm thinking of gluing a piece of plexiglass on it as a patch but was wondering if anyone had a better idea.

Add'l info: the tank is 23" in diameter and 9" tall. The plastic is ~3.5mm thick. The cracks are roughly 2" long. I'm not sure what caused them. The tank is normally sealed except for a bung hole in the top (visible in the 2nd photo) but it's currently in 2 pieces so I can work on it. I can't tell what the plastic is made of (no markings) but the tank has a little give when pressed. Here are 2 photos taken from the inside: Crack1 Crack2

Best Answer

Try using a windshield repair kit like the one shown here: https://www.thoughtco.com/repair-your-chipped-windshield-281417

The basic steps are:

  1. Clean the crack and area around it
  2. Drill a small hole in front of each crack and chip at the hole to create a 'bulls eye', this helps stop the cracks from spreading
  3. Align a resin applicator tool with the crack
  4. Load a windshield resin applicator with resin and begin spreading the resin into the crack
  5. Apply a finishing film to smooth the resin.
  6. Let dry
  7. Scrape away excess resin with a razor.
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