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How to Choose Waterproof and Mildew-Resistant Bathtub Sealant

As homeowners, we all understand the importance of maintaining a clean and healthy bathroom environment. Among the many factors contributing to this, one key consideration is the choice of bathtub sealant.

A bathtub sealant that is waterproof and mildew-resistant can help prevent water damage, mold growth, and other common bathroom problems.

This article will discuss the different types of bathtub sealants and the features to look for in a waterproof and mildew-resistant bathtub sealant.

The top bathtub sealants are known for their waterproof and mildew-resistant properties. Factors to consider when choosing a bathtub sealant.

How to apply and maintain a waterproof and mildew-resistant bathtub sealant. And the importance of selecting a bathtub sealant that is waterproof and mildew-resistant.

The Different Types of Bathtub Sealants

Three main types of bathtub sealants are available in the market – silicone, acrylic, and latex. Each of these types has its unique features, pros, and cons.

Silicone Sealant

  • Pros: Flexible, durable, water-resistant, and mold-resistant
  • Cons: Difficult to apply, long curing time, and more expensive than other types

Acrylic Sealant

  • Pros: Easy to apply, quick drying, and low-cost
  • Cons: Less durable and less water-resistant than silicone

Latex Sealant

  • Pros: Easy to apply, quick drying, and low-cost
  • Cons: Not as durable or water-resistant as silicone or acrylic

Features to Look for in a Waterproof and Mildew-Resistant Bathtub Sealant

When choosing a bathtub sealant that is both waterproof and mildew-resistant, it is essential to look for specific features. These features include:

  • Waterproofing and mildew-resistant agents
  • Flexibility to adapt to the expansion and contraction of the bathtub and walls
  • Durability to withstand regular cleaning and moisture exposure
  • Adhesion to ensure a tight and long-lasting seal

Possessing these features, a waterproof and mildew-resistant bathtub sealant can help prevent water damage and mold growth in the bathroom.

Top Waterproof and Mildew-Resistant Bathtub Sealants

Some of the top bathtub sealants that are known for their waterproof and mildew-resistant properties include:

GE Sealants & Adhesives Advanced Silicone 2 Kitchen & Bath Sealant

  • Pros: High-performance, mold-resistant, and waterproof
  • Cons: It can be difficult to remove

Dap 3.0 Kitchen, Bath & Plumbing High-Performance Sealant

  • Pros: Durable, mold-resistant, and waterproof
  • Cons: Takes longer to cure than some other options

Loctite Polyseamseal Tub and Tile Adhesive Caulk

  • Pros: Waterproof, mold-resistant, and easy to apply
  • Cons: May require multiple coats

These top-rated bathtub sealants are designed to withstand water exposure, mold growth, and other common bathroom problems.

Factors to Consider When Choosing a Bathtub Sealant

When choosing a bathtub sealant, there are several factors that homeowners should consider. These factors include:

  • Bathtub material: Different materials may require different types of adhesives.
  • Temperature: High-temperature sealants may be needed if the bathtub is regularly exposed to hot water.
  • Humidity: A moisture-resistant sealant may be required in humid environments.
  • Water exposure: A water-resistant sealant may be necessary for areas frequently exposed to water.

By considering these factors, homeowners can choose the suitable bathtub sealant.

Apply and Maintain Waterproof and Mildew-Resistant Sealant

Applying a bathtub sealant may seem daunting, but with the right tools and techniques, it can be a DIY bathroom project that yields professional results.

Here is a step-by-step guide to help you seal your bathtub properly:

  1. Prepare the surface: Before applying the sealant, clean the surface thoroughly and remove any old caulk or grout. Allow the surface to dry completely before applying the new sealant.
  2. Choose the proper sealant: Select an adhesive in wet areas like bathrooms. Look for a high-performance, mildew-resistant, and waterproof sealant appropriate for your bathtub material.
  3. Load the caulk gun: Cut the tip of the sealant tube at a 45-degree angle and load it into a caulk gun.
  4. Apply the sealant: Apply the sealant in a continuous bead, starting at one corner of the bathtub and working your way around. Use a steady hand to apply an even amount of pressure on the caulk gun trigger as you move along the bathtub.
  5. Smooth out the sealant: Use a sealant applicator or a finger to smooth out the sealant and remove any excess. Wet your finger before smoothing out the sealant to prevent it from sticking.
  6. Let the sealant dry: Check the drying time on the sealant label, and allow the sealant to dry completely before using the bathtub.

To maintain the sealant and prevent water damage and mold growth, follow these tips:

  1. Clean the bathtub regularly: Use mild detergent or soap and water to clean the bathtub regularly. Avoid using harsh chemicals or abrasive scrubbers that can damage the sealant.
  2. Provide proper ventilation: Open the bathroom window or use an exhaust fan to reduce humidity and moisture.
  3. Check for damage: Regularly inspect the sealant for cracks, gaps, or peeling. Address any damage immediately to prevent water damage and mold growth.
  4. Replace the sealant: If it is damaged or shows signs of wear, remove it and apply a new layer of sealant to keep your bathtub water-resistant and mildew-resistant.


Choosing the suitable bathtub sealant is crucial for maintaining your bathroom and preventing water damage and mold growth. By selecting a high-quality, waterproof, and mildew-resistant sealant and applying it correctly, you can protect your bathtub from moisture, stains, and bacteria.

Whether doing a bathroom renovation, restoration, or simply sealing a bathtub for routine maintenance, following these tips can help you achieve a successful outcome.

Remember to select the suitable sealant, prepare the surface properly, and maintain the sealant regularly to keep your bathroom in top shape.

Joseph A. Bartel
Joseph A. Bartel

Hi, I'm Joseph and I'm passionate about home improvement, particularly bathroom and toilet spaces. With over eight years of experience, I've acquired knowledge in various projects, cleaning tips, plumbing solutions, and fixture installations. I'd love to share this knowledge with you, whether it's selecting the right cleaning products, troubleshooting plumbing issues, or upgrading your bathroom fixtures. Let me help you create a sparkling and functional bathroom and toilet space.