Silicone sealants can make a significant difference in achieving lasting, high-quality results in your sealing projects. But only when it’s applied properly.
If you intend to use a silicone sealant to protect your home from moisture, air leakage, and other damages, it’s essential to be aware of some dos and don’ts. Here’s a detailed breakdown of dos and don’ts to guide you through the process.
Things to Do When Applying a Silicone Sealant
- Do Prepare the Surface Thoroughly
The surface before applying any silicone sealant must be dry, clean, and free of dust, debris, or old sealant. Removal of old sealant should be done with a scraper or utility knife. Then clean the place with isopropyl alcohol to remove any traces and dry it to ensure it sticks better.
- Do Choose the Right Type of Silicone
Silicone sealants can be available in various forms, depending on the project. For example, use a bathroom-specific sealant that is mould and mildew resistant for areas prone to moisture, while a kitchen or outdoor grade might be better suited for those environments. Always read the label to see whether it is compatible with the material you are sealing.
- Do Use a Caulking Gun
Apply the silicone sealant using a caulking gun in an even manner. Depending on the size of the bead you would like to create, cut the tip of the tube at a 45-degree angle. This will enable easier control and reduce mess when applying.
- Do Smooth the Bead
Once the sealant has been applied, smooth the bead with a caulking tool or a finger dipped into soapy water. This will not only leave a clean finish but will also aid in forcing the sealant into any cracks, boosting adhesion.
- Do Allow Adequate Drying Time
Dry and cure according to the manufacturer’s directions. Do not submerge the sealant in water or subject it to stress until it is completely cured. This will help achieve maximum adhesion and the longest life of the seal.
Things to Avoid When Applying a Silicone Sealant
- Don’t Rush the Application
It is essential to take your time during the application process. Never rush, as this can lead to uneven beads, air bubbles, and poor sealing. Plan for the entire project to ensure a patient approach.
- Don’t Use on Wet Surfaces
Silicone sealant cannot stick to wet surfaces. So, always check and confirm that the area is completely dry before applying the sealant to ensure a strong bond.
- Don’t Overapply
It’s easy to apply too much sealant, which creates a messy appearance and can potentially result in more leaks. Aim for a uniform bead that just fills the gap without excessive bulging, which can be hard to clean up later.
- Don’t Forget to Wear Protective Gear
Silicone sealants are generally considered safe. However, it’s still a wise move to wear gloves and work in a well-ventilated area. Therefore, you will avoid any skin irritation or inhalation of fumes.
- Don’t Ignore Safety Precautions
Regardless of your purpose for using silicone sealant, always read the Safety Data Sheet (SDS) carefully. Stick to all recommended safety precautions. This includes proper ventilation and ensuring that you properly dispose of unused materials.
