Sealing grout on a backsplash is an important maintenance task that helps protect the grout from stains and damage. Here is a detailed look at why sealing grout is recommended for backsplashes and how to properly seal the grout.
What is Grout Sealing?
Grout sealing involves applying a protective sealant to the grout lines between tiles. The sealant soaks into the pores of the grout and forms a barrier that prevents stains from setting into the grout.
Sealing grout will make it more resistant to absorbing liquids, grease buildup, and dirt. This helps keep the grout looking clean and uniform in color over time. Unsealed grout will be more vulnerable to staining.
Should You Seal Grout on a Backsplash?
Sealing grout on a backsplash is highly recommended. The grout lines in a backsplash are exposed and prone to all kinds of potential staining from cooking, splattering oils and sauces, and regular use near a sink.
Some key reasons you should seal the grout on a backsplash include:
- Prevent stains – Sealing creates a protective barrier that prevents stains from absorbing into the porous grout. Food, grease, and liquids will sit on the surface of sealed grout rather than soak in.
- Easier cleaning – Sealed grout can be easily wiped clean without staining. Unsealed grout is more likely to become dirty as grime is absorbed.
- Uniform appearance – Sealing grout helps keep it looking uniform in color over time. Without sealing, the grout lines can become patchy as some areas get stained.
- Longevity – Sealing protects grout from damage and deterioration, increasing its lifespan. Unsealed grout is more vulnerable to cracking or crumbling.
When Should Grout be Sealed on a New Backsplash?
For a new backsplash installation, the ideal time to seal the grout is after the tiles have been installed and the grout has fully cured.
Grout cure times vary by product but are generally 72 hours. Sealing prior to full curing could lead to issues with the sealant penetrating the grout properly.
Be sure to check the product specifications for recommended cure times before sealing. Applying the sealant too early can compromise its protective abilities.
How Often Should Backsplash Grout be Re-Sealed?
Over time, the protective seal on grout will naturally wear away from cleaning and regular use. Re-applying a sealant periodically will renew the protective barrier.
For a backsplash, plan to re-seal the grout approximately once a year to maintain optimal protection. Higher traffic kitchens may need re-sealing as frequently as every 6 months.
Check the grout when cleaning. If liquids and grime start penetrating rather than sitting on the surface, it’s time to re-seal. The seal may wear faster in exposed or high use areas near the stove or sink.
What Type of Sealer is Best for Backsplash Grout?
For backsplash grout, the best sealers to use are penetrating sealers:
- Penetrating sealers soak deep into the grout for durable, long-lasting protection. Common types are silicone or acrylic-based formulas.
- Avoid topical sealers that simply coat the outer grout surface. These tend to have weaker protection that wears away faster.
Using a penetrating sealer suitable for the grout material (sanded vs. unsanded) will provide the most effective sealing of a backsplash.
How to Seal Grout on a Backsplash
Sealing grout on a backsplash is a relatively easy DIY project. Follow these key steps:
Supplies Needed
- Grout sealer (penetrating formula recommended)
- Clean rags
- Small foam brush or paintbrush
- Tape (painter’s tape)
- Rubber gloves
- Bucket of clean water
Prep Work
Before sealing, the grout lines should be fully clean and dry:
- Sweep or vacuum any dirt and debris from the backsplash.
- Use a general household cleaner to wash the entire backsplash surface. Rinse thoroughly with clean water and let dry.
- Use a rag dipped in warm water to remove any existing grease or soap scum on the grout.
- Let the backsplash dry completely before sealing. Moisture will prevent the sealer from properly absorbing.
Application Steps
Once prepped, follow these steps to seal the backsplash grout:
- Protect surroundings – Use tape to cover any areas you don’t want to get sealer on, like the countertop or walls.
- Apply sealer – Dip a small foam brush in the sealant and apply a thin, even coat directly onto the grout lines.
- Wipe off excess – Let sealer penetrate for 5-10 mins. Then use a clean rag to wipe off any excess sealer on tile surfaces.
- Cure – Allow the sealer to cure fully, checking the product directions for cure times. The area can be used once cured.
- Re-apply – Follow this process annually or semi-annually to re-seal grout as needed.
And that’s it! Following a good sealing routine will help maintain the look and integrity of backsplash grout over time. Be sure to use quality penetrating sealers designed for grout application.
Frequently Asked Questions
Does all grout need to be sealed?
Not necessarily. Floors and countertop grout see less exposure and may not need sealing. But backsplash grout should always be sealed due to high exposure near sinks, stoves, and daily use.
Can I use a clear silicone caulk instead of sealing grout?
Applying a silicone caulk or sealant over existing grout is not recommended. Silicone will just coat the outer surface, not penetrate and seal within the grout pores. Proper penetrating sealers are longer-lasting.
How long does a seal on grout last?
For a backsplash, expect to need to re-seal grout about once per year, depending on frequency of use. Higher use kitchens may need re-sealing every 6 months. Check for grout getting stained/dirty as an indicator to re-seal.
Should I seal grout before or after cleaning a new backsplash?
Always seal grout only after the full cure time and after thoroughly cleaning/prepping the grout lines. Sealing over damp or dirty grout will lead to poor seal quality.
What’s the difference between sanded and unsanded grout?
Sanded grout contains fine sand aggregate and is used for wider grout lines on floors or walls. Unsanded grout has a smoother finish and is for narrow grout lines under 1/8 inch. Be sure to use a sealer suitable for sanded or unsanded grout as applicable.
Conclusion
Maintaining backsplash grout with proper sealing is important for keeping it looking clean and uniform over time. Penetrating sealers that soak into the grout pores provide the most effective, long-lasting protection against stains.
Aim to seal backsplash grout about once a year, after fully cleaning the surface. Re-apply sealer anytime the grout appears to be getting stained. With a good sealing routine, your lovely backsplash and its grout lines will stay looking great for many years.