The TAJIMA CR401S chalk line seems to have some mixed reviews when it comes to chalk leakage. The manufacturer highlights the felt gasket that's supposed to help distribute chalk and reduce leakage, but our research suggests people have different experiences with this feature.
Some folks have mentioned that they still noticed chalk leakage, even with the gasket. For example, one person got a unit without the gasket at first and still found chalk wastage pretty high even after they got a replacement. Another mentioned that it leaks when stored, even with the gasket.
So, it looks like while the gasket is there to help, it might not always do the trick due to possible manufacturing differences or how it's used.
On the upside, the lines it creates are generally seen as clear and precise. People seem to appreciate its ability to make visible lines on various surfaces, which is key for lots of jobs.
Just keep in mind that you might want to handle it carefully to avoid any potential mess, especially if clean lines are a must for you.
So if you really need clear marks and less mess, it might be worth giving it a shot to see if it suits your needs. Many people like its durability and performance, but the leakage issues are something to consider when deciding if it's the right tool for your tasks.