If the bottom of a plastic bucket bursts, then it is useless to try to seal it. No glue can withstand the long-term pressure poured into the liquid container and over time, the crack on the plastic will certainly break.
It is much more reliable to repair a broken bucket by sealing a crack in it with another suitable piece of plastic.
To do this, you will need:
• large and powerful soldering iron;
• a plastic tape, which, for example, can be cut from an unnecessary PET bottle, or a plastic collar;
• any detergent.
It is necessary to seal the crack both inside the bucket and outside, and it is recommended to start from the inside, since there the edges of the crack can be laid tightly enough against each other, resting them on the surface on which the bucket stands.
If you start work from the outside of the crack, then its edges will spring, fall through and lay them on top of each other tightly it will be difficult.
However, for ease of perception, let us consider, nevertheless, how a crack is sealed on a plastic bucket from its outer side, bearing in mind that it is already closed inside the container.
So, in order to solder a plastic bucket:
1. Its surface around the crack is thoroughly washed and degreased.
2. Turn on the soldering iron, wait for it to warm up, and smoothly move it from left to right along the crack, without pressing on the plastic so as not to burn it. Thus, by melting the plastic at the edges of the crack, a soldering iron tip passes along its entire length.
3. Consistently lay the plastic tape on the crack, starting from a point a little further than its beginning. In this case, the tape is heated with a soldering iron so that the melted plastic fills the cavity of the crack, that is, figuratively speaking, it is sealed.
4. After sealing the cracks, a seam is obtained, which is additionally smoothed with a hot soldering iron, moving its tip along this peculiar “welded” line.
So easily and without any special tricks you can solder a crack on a plastic bucket or any other container made of plastic. Inside the bucket, the seam is made using the same technology.
It remains only to check whether it leaks after the repair.
Video of the process of sealing a crack on a plastic bucket: