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How to Seal a Leaky Bathtub with Silicone Sealant – A Simseal Guide

by | Apr 16, 2024 | Uncategorized | 0 comments

Applying silicone sealant to bathtub seam

Introduction: Why Proper Bathtub Sealing Matters

A leaky bathtub isn’t just an annoyance—it can lead to water damage, mould growth, and even structural issues in your home. At Simseal, we specialise in high-performance sealing solutions designed for Australian bathrooms. In this guide, we’ll walk you through the best practices for sealing your bathtub using professional-grade silicone sealant, ensuring a watertight, long-lasting finish.

Step 1: Identify the Source of the Leak

Before applying any sealant, you need to locate the leak. Common problem areas include:

  • Around the Bathtub Edges – Check for gaps between the tub and tiles/walls.
  • Around Faucets & Fixtures – Look for drips or corrosion near taps.
  • The Drain Area – Inspect for water seepage or loose fittings.

Pro Tip: Dry the area thoroughly and run water to pinpoint leaks.

Step 2: Gather the Right Tools & Materials

For a professional finish, you’ll need:

  • Silicone Sealant – We recommend Simseal’s Premium Bathroom Silicone, a mould-resistant, flexible sealant perfect for wet areas.
  • Caulking Gun – For smooth, controlled application.
  • Utility Knife – To remove old, cracked sealant.
  • Cleaning Supplies – A mild detergent or rubbing alcohol to prep the surface.
  • Masking Tape – For clean, straight edges.

Why Simseal? Unlike cheap sealants, Simseal’s silicone offers superior adhesion and durability in humid Australian bathrooms.

Step 3: Prepare the Surface for Sealing

  1. Remove Old Sealant
    • Use a utility knife or caulk removal tool to scrape away damaged silicone.
    • Ensure no residue remains for the best adhesion.
  2. Clean & Dry Thoroughly
    • Wipe down with rubbing alcohol or a bathroom cleaner to remove soap scum.
    • Let the area dry completely before applying new sealant.

Pro Tip: Use masking tape along edges for a neater finish.

Step 4: Apply the Silicone Sealant Like a Pro

  1. Load the Caulking Gun
    • Cut the nozzle at a 45-degree angle for precise application.
  2. Apply a Smooth Bead of Sealant
    • Hold the gun at a consistent angle and apply steady pressure.
    • Fill gaps completely but avoid excess buildup.
  3. Smooth the Sealant
    • Dip your finger in soapy water and gently run it along the sealant for a professional finish.
    • Remove masking tape immediately after smoothing.
  4. Clean Up Excess
    • Use a damp cloth to wipe away any stray silicone before it dries.

Step 5: Let It Cure Properly

  • Simseal’s silicone sealant typically cures in 24 hours.
  • Avoid using the bathtub during this time for best results.
  • Test the seal by running water and checking for leaks.

Bonus Tips for Long-Lasting Results

  • Prevent Mould Growth – Use a mould-resistant silicone like Simseal’s and clean regularly.
  • Reapply Every Few Years – Even the best sealant degrades over time.
  • Avoid Cheap Sealants – Low-quality silicone cracks and peels quickly.

Need a Reliable Silicone Sealant? Try Simseal!

For a professional-grade, long-lasting seal, trust Simseal’s Premium Bathroom Silicone. Designed for Australian conditions, it offers:

  • Superior waterproofing
  • Mould & mildew resistance
  • Flexibility to prevent cracking

👉 Browse Simseal’s Sealant Range Here

Final Thoughts

Sealing a leaky bathtub is a simple DIY job with the right tools and techniques. By following this guide and using high-quality Simseal silicone, you’ll prevent leaks, mould, and water damage—saving money on costly repairs.