Tips from the pros: applying silicone sealant

Applying sealant is the finishing touch to a range of jobs, from simple grouting to installing a whole new bathroom. It can also be a job in its own right if the old sealant is simply past its best and in need of replacing.

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While applying silicone sealant is a simple and small job, it can be very fiddly. Getting that nice, neat, professional-looking finish can be very hard indeed, but following a few simple tips can make the matter much easier.

Prepare the surface

A properly-prepared surface is vital for getting a job that is neat, high-quality, and ready to last. Ensure surfaces are thoroughly clean, free from dust and debris and dry before you apply the product. Soap residue, grease, and any remaining old sealant can keep the new sealant from adhering.

Use good-quality sealant

Good-quality silicone sealants are a must in business but if you require great Silicone Moulds as well these can be found from suppliers such as They will behave better in use, making it easier to apply sealant properly and neatly, and will last longer once they have been applied.

Prepare the tube

Cut the tube spout cleanly at about a 30-degree angle for best results. Avoid cutting it too large, which allows the silicone to flow too freely. Wrap the tube in a non-stretchy tape − simple, brown parcel tape will work fine − to prevent expansion under pressure, which can cause overrun.

Apply with care

Apply the sealant carefully and don’t try to rush. Before you start dispensing it, try to put yourself in the best, most central position for carrying out a single, continuous run along the whole length of the seam with as little stretching, overreach or movement as possible. Don’t put too much down, as it will spread out somewhat during the next step.

Smooth it

Once you have laid down a line of sealant, it is time to smooth it over. This is simply done with your finger. It is essential that you wet your finger first, however, as this will prevent the sealant trying to stick to your finger, which will make it very difficult to smooth it properly. Use only water to wet your finger, as the bacteria in saliva can encourage mould growth. As you smooth, push the sealant slightly into the gap to ensure a good seal.