Remove silicone joints completely for a proper re-grouting

Often it is the mold that makes silicone joints, but also aging and excessive cleaning agents destroy the material. After a few years, a new grouting is due, but first the old joints must be thoroughly removed.

Mold in the silicone joints? Check wall!

persistent mold infestation always has a lasting effect of moisture as the cause. If you ventilate your bathroom and kitchen well and wipe the tiles dry after bathing and showering, you prevent the mushrooms from forming.

Nevertheless, if mold permanently appears, the problem may be deeper. Maybe the masonry is already infested with fungi, or at least the plaster under the tiles.

In this case, you should urgently do cause research for their health and eliminate the source of moisture including the fungus: Because mold in homes triggers many diseases.

Use a shark to remove silicone joints

If the mold is kept within limits and only the silicone is affected, any layman can easily lend a hand. Before re-grouting, it is important to remove the old silicone joints completely so that the new material can adhere well.

For this purpose, use a special joint scraper, ideally a so-called "grooved shark", which due to its curved shape is particularly suitable for removing joints of any kind. Some shark sharks have replaceable blades, they cost around 5 EUR.

The handy tools ensure a gentle processing of the substrate and a good distribution of force. So you do your job very fast and tidy.

Mechanically remove old silicone joints: That's how it works!

The mechanical removal of silicone joints is usually preferable to chemical separation, as it is completely harmless to health. This is how the joint treatment with the groat shark works:

  • Prick the grout with the pointed blade of the joint scraper.
  • Cut the grout now by pushing or pulling.
  • Use the other end of the joint scraper to remove residues.
  • Wipe the joints with a damp cloth.

Thorough removal of silicone residues with home remedies

It is not always possible to remove all silicone residues from the joints with the joint scraper. To remove silicone, baby oil, which flows next to and under the sealant, is particularly suitable.

Apply plenty of baby oil to the affected area and leave it on for a while. Then you scratch everything out again: it should now go much easier!

Brittle silicone can also be easily peeled off when it is strongly cooled. Use ice cubes or ice spray, the sealant does not last long. You will then always need a sharp-edged object to dissolve out silicone.

Use special silicone remover

Silicone removers usually work in hardened or fresh layers up to 2 mm deep, but most silicone joints are deeper. Either you cut your joints in layers - or you only use the chemical agent to remove the residues.

We recommend to use silicone remover only after the mechanical joint removal, if the mentioned home remedies fail. As an alternative, alcohol, acetone or universal dilution are recommended.

Tape the joints to be treated with tape before using silicone remover or other solvents to protect the surrounding areas.

Remove mold from the substrate as well

If the old silicone joints are so moldy that the traces are already visible on the ground, you should definitely remove the fungus completely. Special mold cleaners are suitable for this purpose - and a mold blocker to prevent further infestation.

After using a mildew blocker, allow the joints to dry for at least 24 hours before re-grouting. Meanwhile, keep the window open - and the door to the rest of the apartment locked.

Tips & Tricks

Buy a high-quality material for the new silicone joints, which already has fungicidal active ingredients. To prevent renewed fungal attack in the longer term.

Video Board: Remove & replace moldy shower caulk