Sealing bathrooms and kitchens before winter

Sealing bathrooms and kitchens before winter

Does your mirror mist up after a shower, or do droplets collect on the windows while you cook? In the colder months, moisture is a frequent companion to everyday household tasks. This is also when we quickly notice darkened silicone around the bath or a cracked joint behind the kitchen sink. November is therefore a good time to inspect your bathroom and kitchen and tackle small repairs yourself. With the right TKK SEAL sealant and a little patience, you can keep joints neat and reduce the risk of leaks.

A small crack can mean a bigger problem

A comfortably warm bathroom and a long shower are especially inviting in winter. However, steam turns into droplets on colder surfaces, and poor ventilation makes the room dry more slowly. Joints around washbasins, baths, shower enclosures and kitchen sinks are also exposed daily to direct wetting, cleaning products and movement of the materials.

If the silicone is pulling away from the surface, is cracked or has dark marks that cleaning cannot remove, it is time to replace it. Water can seep through a damaged joint behind sanitary fittings or wall coverings. New silicone helps seal these joints, but it does not address the causes of condensation or replace the waterproofing beneath tiles. If you notice damp walls or recurring leaks, have a professional investigate the cause.

For natural stone, acrylic baths and other sensitive materials, always check that the selected product is suitable. Not every silicone is suitable for every substrate. The instructions and technical data sheet also help you determine the right application conditions and how long to wait before using the area again.

In winter, also check the temperature of the room and the substrate. Store the cartridge at room temperature before starting, and apply the sealant under the conditions specified by the manufacturer. A cold bathroom in an unheated holiday home is therefore not a suitable place for this job.

DIY renewal of a joint around a washbasin

For your first DIY project, choose a short, easily accessible joint, such as the one between a washbasin and the wall. Move soap, cups and towels out of the way and prepare a cartridge gun, your chosen silicone, a silicone remover or suitable tool, a substrate cleaner, a cloth, masking tape, a smoothing tool and a dedicated smoothing agent. Wear protective gloves and ventilate the room while working.

1. Remove the old silicone

Carefully cut out the old sealant and remove any residue along the edges. Take care not to damage the surfaces. Applying a new layer over the old one is a tempting shortcut, but it will not ensure reliable adhesion. To remove old silicone, use TKK SEAL Silicone remover for cured silicone, following its instructions and checking its suitability for the substrate.

2. Clean and dry the substrate

Remove grease, soap residue and dirt with a suitable cleaner. The surface must be clean, sound and dry. Do not start sealing immediately after showering or cleaning. If the joint is damp, allow enough time for it to dry.

3. Protect the edges and prepare the cartridge

Apply masking tape along both sides of the joint and insert TKK SEAL Backfilling tape into the gap. Choose its size according to the width and depth of the joint. You can read more about the backing tape and its purpose in the article. Then coat the sides of the joint with the appropriate TKK SEAL Silicone & hybrid primer and wait approximately 40 minutes before applying the sealant. Open the cartridge and screw on the nozzle, cutting it at an angle to suit the joint width. First apply a short bead onto scrap cardboard to get a feel for it. This will help you coordinate trigger pressure with the speed of your hand.

4. Apply and smooth

Apply the sealant evenly and continuously to fill the entire length of the joint. Then shape it promptly with a suitable TKK SEAL Smoothing tool and the dedicated TKK SEAL Smoothing agent, before a surface skin forms. Remove the masking tape immediately after smoothing. When pausing, release the pressure on the gun to prevent unnecessary sealant flow.

5. Allow enough time

Do not wet or clean the fresh joint until it is ready for exposure to water, according to the instructions for your chosen product. A surface that feels dry to the touch does not mean the sealant has cured all the way through. Plan the job so that you will not need the washbasin or shower during this time.

Keep the fresh look for longer

After showering, remove excess water and ventilate the room. Use the extractor hood when cooking, and regularly clean the joints gently and dry them. Even mould-resistant silicone needs maintenance. Check the edges occasionally: minor damage is easier to repair before water finds its way behind the wall covering.

Start with one joint and see the difference. A well-kept bathroom or kitchen often begins with a small repair at home.

Discover TKK SEAL sealants and choose the right solution for your next home project. Before you begin, watch the application instructions video too.