How to Seal Laminate Flooring Around a Bathtub – The Ultimate Guide
Hey there! I‘m Lillie Gabler, your friendly bath remodeling advisor. If you‘re thinking about installing laminate flooring in your bathroom, you‘ve come to the right place. Protecting laminate flooring around the bathtub area is crucial for keeping your floors looking beautiful for years to come. With over 10 years of experience in home renovations, I‘m excited to share my best tips and tricks for properly sealing this vulnerable area.
Installing laminate flooring can definitely upgrade the look of your bathroom. But let‘s be real – this material is not designed to get wet or sit in puddles of water! Without proper moisture protection, laminate flooring is prone to swelling, warping, discoloration and mold growth. No fun!
The good news is that with the right materials and techniques, you can easily achieve a water-resistant seal that will stand the test of time. In this detailed guide, I‘ll walk you through:
- The key reasons sealing is so important
- A checklist of supplies you‘ll need
- Crucial prep work before installing
- A step-by-step sealing process
- Tips for ongoing maintenance
- Helpful FAQs
Let‘s get started!
Why Proper Sealing is Crucial
It‘s no secret that water and laminate flooring don‘t mix well. When moisture seeps between the flooring planks, it can cause all types of problems:
- Warping or distortion of the flooring shape
- Swelling along the edges of the planks
- Gapping between planks as they push apart
- Discoloration or staining on the flooring surface
- Growth of mold, mildew and bacteria in hidden crevices
These damages are often irreversible. So prevention is key! Properly sealing around the tub creates a waterproof barrier that keeps liquid from penetrating underneath the flooring.
According to HomeAdvisor, the average cost to replace a bathroom‘s laminate flooring is $722 to $1,317. Ouch! Avoiding just one incident of water damage can save you big bucks down the road.
Beyond protecting your investment, sealing also:
- Prevents musty odors from moisture buildup
- Creates a tidy, finished look around the tub area
- Reduces risks of slips or falls from water under the flooring
- Improves indoor air quality by blocking mildew and bacteria growth
When installed correctly, seals can protect your flooring for a decade or more!
What Supplies You‘ll Need
Arm yourself with these essential supplies before starting the sealing process:
- Sealant designed for kitchens & baths (silicone or polyurethane)
- Backer rod – circumference should equal perimeter being sealed
- Caulk gun for sealant application
- Painter‘s tape
- Sealant smoother
- Rubbing alcohol & clean cloths
- Utility knife for cutting
- Tape measure
I recommend investing in a higher-end sealant made specifically for wet areas. Cheaper alternatives tend to breakdown faster. GE makes an excellent silicone sealant that I‘ve used with great success around bathtubs.
Critical Pre-Sealing Steps
Careful prep work ensures you get an airtight, long-lasting seal:
Install Transition Strips
Transition strips create a bridge between the laminate floor and adjacent flooring materials. This helps minimize gaps that can lead to moisture intrusion. Use aluminum transitions between laminate and tile, and reducers when transitioning to carpeting.
Acclimate the Flooring
Laminate flooring needs time to adjust to your home‘s temperature and humidity before installing. Leave the sealed boxes of flooring laying flat in the room for 48 hours prior to installation. This helps prevent excessive expansion or contraction after sealing.
Apply Underlayment
Underlayment acts as a moisture barrier between the subfloor and laminate planks. Roll out laminate underlayment over the entire subfloor according to manufacturer instructions, including a few extra inches around the tub.
Clean Surfaces Thoroughly
Use rubbing alcohol to meticulously clean the laminate floor edges and bathtub lip where sealant will adhere. This removes any soap scum, oils or debris that could interfere with bonding.
Adequate prep is the secret sauce behind seamless, long-lasting seals! Don‘t skip these crucial steps.
Step-by-Step Sealing Process
Follow these steps closely when sealing around the tub:
Step 1: Insert Backer Rod

Backer rod supports the sealant while providing the right shape. Press foam rod into the gap so it sits flush against both sides. Use a snug fit – about 20% wider than the crevice. Trim any excess length.
Step 2: Apply Painter‘s Tape

Painter‘s tape creates straight sealant lines and prevents messes. Apply tape evenly along both sides, about 1/8" from the gap. Smooth any wrinkles or folds.
Step 3: Load Sealant into Applicator Gun

Load silicone sealant into caulk gun, trim nozzle to 1/4" opening, and dispense until an unbroken bead flows out. This prepares the applicator for smooth, consistent flow.
Step 4: Apply Continuous Sealant Bead

Hold the applicator at a 45° angle and steadily run a bead of sealant around the entire tub perimeter. Sealant should contact both sides of the gap fully.
Step 5: Tool Sealant to Smooth Finish

Use a silicone tool to create a concave shape sloping towards the gap center. This allows the sealant to expand and contract freely. Remove any excess.
Step 6: Remove Tape & Allow Sealant to Cure
Carefully remove painter’s tape without disturbing the sealant. Avoid getting the area wet for 24 hours while sealant fully cures. And voila – you have a complete moisture barrier!
Helpful Maintenance Tips
To maximize your sealant‘s lifespan and performance:
- Inspect the seal periodically for any gaps or cracks, and reapply sealant to compromised areas immediately
- Consider using a silicone resealer product every couple of years
- Always wipe up spills quickly to avoid moisture damage
- Use bath mats, curtains and splash guards to protect flooring from overflow
- Maintain 40-60% humidity levels with a humidifier or dehumidifier
- Avoid harsh cleaners or chemicals near the flooring
With proper care, your sealant can last 5-10 years or longer!
FAQs About Sealing Laminate Floors Around Bathtubs
Here are answers to some common sealing questions:
What‘s the ideal sealant to use?
I recommend a high-quality silicone bathroom caulk like GE Silicone I. Avoid cheaper vinyl or latex sealants.
Where should I apply the sealant?
Run a bead along the entire seam where the laminate flooring meets the bathtub. Seal all edges and corners thoroughly.
How long does sealant last?
Expect 5-10 years of performance with regular maintenance. Eventually sealant can shrink and crack over time.
Can I caulk over the sealant for extra protection?
Yes! Applying tub & tile caulk over the cured silicone seal provides excellent waterproofing.
What are signs I may need to reseal?
Look for gaps, cracks, bubbling, curling, or any evidence of moisture intrusion. Reseal annually or biannually.
Ready to Seal Your Laminate Flooring Like a Pro!
Well there you have it, my complete guide to professionally sealing laminate flooring around the bathtub! With the right prep work, high-quality materials, and precise installation, you can protect your floors from moisture damage for years of enjoyment.
If questions come up down the road, don‘t hesitate to reach out! I‘m always happy to offer friendly advice on keeping your home renovations looking beautiful. Wishing you the best of luck with your project!