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Mould can cause serious health issues, and it also looks unsightly. Getting rid of mould from shower silicone and other areas of your bathroom is easier than you might think. With the right supplies and information from this step-by-step guide, you’ll have fresh, clean silicone in no time.
Safety tip: Always wear the appropriate safety equipment (safety glasses, gloves, ear muffs and a mask, for example) and always follow the instructions for the product or equipment.
It’s important to wear the proper safety equipment (gloves and a mask, for example) to prevent inhaling any mould spores. Ensure the room has proper ventilation by opening a window or using the exhaust fan. Use a microfibre cloth to clean surfaces – you want a dust-free, debris-free, and hair-free environment.
Use a rubber or plastic scraper to gently scrape away the silicone. Be careful not to damage the surface.
After removing the bulk of the silicone, clean the area with mineral turpentine or isopropyl alcohol to eliminate any residue. Allow it to dry in preparation for the silicone remover.
Once you’ve wiped down the area, wipe it down again with methylated spirits to ensure the area is clean and free of any silicone debris or cleaning residue. Allow to dry for a few minutes.
Carefully examine the area where the silicone was removed for any signs of mould or mildew. These may appear as dark spots, discoloration, or a fuzzy growth. Mix a solution of water and mould or mildew cleaner according to the product's instructions. Spray the mildew remover on the affected area and allow it to sit according to the instructions on the label. Once this is done, wipe the solution away with a damp cloth.
Give the area another wipe down with mineral turpentine and allow it to dry. This will prepare the area for a new layer of silicone.
If you want to achieve a neat and precise finish, use masking or painter's tape to seal off the areas adjacent to where you plan to apply the silicone. This helps in creating clean lines and it makes clean-up easier.
Now it’s time to apply the new silicone. Using a sharp utility knife, cut the tip of the silicone tube at a 45-degree angle. The size of the opening should match the width of the gap you intend to fill. Use the built-in seal puncture tool found on the silicone tube's cap or use a separate tool to break the seal inside the nozzle.
Insert the silicone tube into a caulking gun. Squeeze the trigger repeatedly until the silicone starts to emerge from the nozzle. Hold the caulking gun at a 45-degree angle and, with a steady hand, apply a smooth, even bead of silicone along the intended gap or seam. Keep a consistent pace to maintain a uniform appearance.
Before the silicone dries, spray some soapy water and use a smoother or your finger to smooth down the silicone. Wet your finger with the soapy water or use the scraper to gently run it over the freshly applied silicone to smooth out any imperfections and create a clean finish. Allow the silicone to cure for 72 hours or according to the label.
Wipe up any silicone spills or clean up the edges with a rag and mineral turpentine.
To reduce the chances of future mould, regularly clean the area, keep the space well-ventilated and use your exhaust fan in high-moisture areas.
Asbestos, lead-based paints and copper chromium arsenic (CCA) treated timber are health hazards you need to look out for when renovating older homes. These substances can easily be disturbed when renovating and exposure to them can cause a range of life-threatening diseases and conditions including cancer. For information on the dangers of asbestos, lead-based paint and CCA treated timber and tips for dealing with these materials contact your local council's Environmental Health Officer or visit our Health & Safety page.
When following our advice in our D.I.Y. videos, make sure you use all equipment, including PPE, safely by following the manufacturer’s instructions. Check that the equipment is suitable for the task and that PPE fits properly. If you are unsure, hire an expert to do the job or talk to a Bunnings Team Member.
