How to effectively remove polyurethane foam glue from solar water heaters after curing?

First of all, it must be cleaned before curing, otherwise it will be difficult to clean. If you produce solar energy, there is now a mold release agent, specially formulated to treat polyurethane materials. Before foaming, simply apply a little to the outer shell, where the material is easy to absorb. seal the foam tooling. Think about ways to keep the material from spilling out, like adding sponge strips and rubber bands. You can also contact the supplier and ask the industry personnel to repair it.