Applying and finishing sealant – the secret to neat joints

A neat sealant edge makes a big difference in any room. Whether in the bathroom, kitchen or around windows: proper sealant application and finishing not only ensures a clean look, but also protects against moisture, mould and dirt build-up. Yet in practice, it turns out to be trickier than it seems. Uneven seams, loose sealant or visible smudges are common frustrations. With the right preparation, technique and products - such as the Super Finisher 500ml from SuperCleaners - you can achieve a professional result.

For a beautiful, durable finish, everything starts with a clean and grease-free substrate. Old sealant, dust or grease residue can cause new sealant to adhere poorly and come off faster. Therefore, always remove the old layer first with Super Silicone Remover. This product softens old sealant, allowing you to easily remove the remains without damaging the substrate.

Then clean the surface thoroughly with Super Pro All Purpose Cleaner & Degreaser. This removes grease, soap residue and dust - perfect for bathrooms, kitchens and window frames. Then let the surface dry thoroughly before you start. For a tight edge, you can apply painter's tape along the joint; this will prevent you from slipping with the sealant sprayer.

Wanted more information on kit removal? Then take a look at here our blog on kit removal.

The finish determines the final result. Many DIYers use washing-up liquid or soapy water to smooth sealant, but this is not a good idea: it corrodes the sealant and weakens adhesion. The Super Finisher 500ml has been specially developed to smooth sealant safely and professionally without leaving residues or stains.

Spray the Super Finisher onto the joint and surrounding surfaces immediately after applying the sealant. Then use a jointing stick, PVC pipe or putty knife to smooth the joint in one fluent movement. Thanks to the spray, the sealant will not stick to your tools and the surface will remain nice and even.

Then let the sealant cure thoroughly. If the joint is later painted over, rinse with clean water for best adhesion.

1. Suitable for all types of sealant - silicone, acrylic, butylene and universal
2. Biodegradable and free of hazard symbols
3. Handy spray bottle, ready to use immediately
4. Ensures a smooth, even and professional end result
5. Safe to use indoors and outdoors

Let the new sealant cure for at least 24 hours before using the room again. In damp rooms such as bathrooms or kitchens, this may take a little longer. Afterwards, clean the joints regularly with the Super Multi Heavy degreaser & Cleaner. This product keeps joints hygienically clean and prevents mould growth, without affecting the sealant.

You use SUPER Multi Heavy Degreaser & Cleaner like this:

1. Spray the product on the contamination
2. Give the product a short soaking period of a few seconds for light soiling, up to 1 minute for heavy soiling
3. Do not let the product dry out
4. Then clean the surface with a damp microfibre cloth or scouring pad

Want to remove old sealant before applying new?
Or are you curious about the full step-by-step plan for kit removal and application?

Read then:

Remove sealant residue - the basis for a clean finish
Kit removal and application - tight joints step by step