When you need a perfect, truly waterproof seal, there’s only one material that will do the job. Silicone sealant waterproof outdoor seals are necessary in the garden, around ponds, for home repair jobs, and more – and there are just as many indoor uses. For example, if you have damage to a cultured marble, ceramic, or porcelain countertop, this type of sealant can mean the difference between an expensive replacement or an easy repair.

But even the best silicone waterproof sealant can’t do the job properly if you don’t prepare and use it correctly. Today, we will explain exactly how to use silicone sealant to achieve a long-lasting, completely waterproof seal.

Gather Your Supplies

Silicone sealant can be a tricky material to work with. While you should always check and work within the manufacturer’s instructions, this supply list has everything you need for most applications.

The first thing you need is silicone sealant. For the best results, choose 100% silicone sealant. You will also need:

• Isopropyl alcohol for surface preparation
• A dry cloth
• Construction adhesive for extra reinforcement (optional)
• Gloves for protection against chemicals and to maintain cleanliness

Preparing the Surface

The key to a successful waterproof seal lies in thorough surface preparation. First, brush off your surface to get rid of any debris. For bigger areas, you may wish to vacuum. Then, clean the surface with isopropyl alcohol to remove any dirt, grease, or residue that may hinder adhesion.

Ensure the surface is completely dry before proceeding to the next step. You can use a dry cloth to remove excess moisture.

Apply Silicone Sealant

With the surface prepped and ready, it's time to apply the silicone sealant. Make sure that you’re wearing gloves before you start. Cut the tip of the sealant tube at a 45-degree angle to achieve the desired bead size.

Start by squeezing the trigger gently and steadily to dispense the sealant along the intended seal line. Consistent pressure will ensure uniform application.

Once the sealant is applied, use a tool such as a caulking gun or a putty knife to smooth and shape the sealant bead. This step is crucial for achieving proper adhesion and a neat finish. Work swiftly but carefully to avoid smudges or unevenness.

Allow for Curing Time

Silicone sealant needs time to cure. Typically, silicone sealants require around 30 minutes to set, but curing times are much longer. They vary depending on factors such as temperature and humidity. Avoid exposing the wet sealant to water or high pressure during this period to prevent distortion or displacement.

After 24 hours (or longer; consult the manufacturer’s instructions for curing times), you should inspect the sealed area for leakage. Gently apply pressure and run water over the sealed surface to test the seal. Leaks and gaps can make the waterproofing less effective.

Additional sealant may be necessary to improve the seal. You can also add construction adhesive to the edge of the seal for extra strength.

Health and Safety

To safeguard against mold, mildew, and bacterial growth, choose a silicone waterproof sealant formulated to resist microbial proliferation. Additionally, ensure proper ventilation in sealed areas to discourage moisture buildup and create an inhospitable environment for these contaminants.

Wearing gloves is a good idea when working with silicone sealant, but if some gets on your hands, don’t worry. Rinse the area thoroughly with soap and water to remove any residual sealant. Use a mild soap and gently rub the skin to dislodge the sealant. Avoid scrubbing too vigorously, as that can cause irritation.

One trick for getting silicone sealant off your hands is to use a plastic grocery bag. Rub it on your hands just like you’d use a washcloth. If the waterproof sealant hasn’t dried, it will stick to the bag more readily than it will stick to your hands. But you don’t want to use a fabric washcloth; once silicone sealant dries, it’s very difficult to get out – so if it gets on the washcloth, it’s essentially ruined.

Ultimately, silicone sealant was designed for waterproof sealing. While you do need to be careful and follow the instructions, achieving the perfect seal is within your grasp. You just need the right technique and the right materials.

Are you a contractor, construction supplier, or anybody else who needs access to top-of-the-line silicone sealant at highly competitive prices? Silicone Depot has what you need. Please call us at 812-824-8000 and we can help you find the perfect waterproof silicone sealant for your construction needs.