how to seal bluestone

3 min read 21-01-2025

Bluestone, with its stunning blue-gray hues and natural durability, is a popular choice for patios, walkways, and other outdoor features. However, this beautiful stone requires proper sealing to protect it from the elements and maintain its elegant appearance. This comprehensive guide will walk you through the process of sealing bluestone, ensuring your investment stays beautiful for years to come.

Why Seal Bluestone?

Sealing bluestone offers several crucial benefits:

Protection from Staining: Bluestone is porous, meaning it can absorb liquids like oil, wine, or other spills. Sealing creates a barrier, preventing these stains from penetrating the stone.
Weather Resistance: Sealing protects bluestone from the damaging effects of frost, rain, and UV rays, preventing discoloration and erosion.
Enhanced Durability: A sealant strengthens the stone, making it more resistant to chipping and cracking.
Easier Cleaning: Sealed bluestone is much easier to clean; dirt and grime simply wipe away.

Choosing the Right Sealer for Bluestone

Selecting the appropriate sealer is the first crucial step. Different sealers offer varying levels of protection and aesthetics. Common types include:

Penetrating Sealers: These sealers soak into the pores of the stone, protecting it from within. They are less noticeable than topical sealers and allow the natural beauty of the bluestone to shine through. This is generally the recommended type for bluestone.
Topical Sealers: These form a film on the surface of the stone, offering a higher level of protection but potentially altering the stone's appearance. They may create a glossy or wet look.
Enhancing Sealers: These sealers not only protect the stone but also enhance its color and appearance. They may darken or brighten the bluestone's natural hue.

Important Consideration: Always test a small, inconspicuous area of your bluestone before applying the sealer to the entire surface. This allows you to check for any adverse reactions or changes in appearance.

Preparing Your Bluestone for Sealing

Proper preparation is vital for a successful sealing job. Here's a step-by-step guide:

Cleaning: Thoroughly clean the bluestone surface to remove any dirt, grime, moss, or other debris. Use a stiff brush, a pressure washer (low pressure setting), or a suitable stone cleaner. Allow the bluestone to dry completely. This is crucial; any moisture will prevent the sealer from penetrating properly.
Repairing Damage: Address any cracks or chips before sealing. Use a suitable stone repair filler and allow it to cure completely according to the manufacturer's instructions.

Applying the Sealer

Once your bluestone is clean and dry, you can begin applying the sealer. Always follow the manufacturer's instructions carefully. Here are some general guidelines:

Apply in Thin Coats: Use a brush, roller, or sprayer to apply thin, even coats of the sealer. Avoid pooling or excessive application.
Work in Sections: Work in manageable sections to ensure even coverage.
Allow Sufficient Drying Time: Allow ample drying time between coats. This will usually be specified on the sealer's packaging. Typically, this will involve waiting for the first coat to dry before applying a second coat.
Multiple Coats (if necessary): Most sealers require multiple coats for optimal protection.

Maintaining Your Sealed Bluestone

Even with sealing, regular maintenance is necessary to keep your bluestone looking its best.

Regular Cleaning: Sweep or brush away dirt and debris regularly. Use a gentle cleaner specifically designed for stone when needed. Avoid harsh chemicals or abrasive cleaners.
Prompt Stain Removal: Address spills immediately. Blot up any spills with a clean cloth. For stubborn stains, consult the sealer manufacturer’s instructions or a professional stone cleaner.
Resealing: Depending on the type of sealer used and the level of exposure to the elements, resealing may be necessary every few years. Monitor the bluestone and reseal when protection seems to be wearing off.

Choosing a Professional

If you're uncomfortable tackling this project yourself, hiring a professional stone sealer is always an option. They possess the expertise and equipment to ensure a flawless and long-lasting seal.

By following these steps, you can effectively seal your bluestone, preserving its beauty and extending its lifespan for years to come. Remember to always prioritize safety and follow the manufacturer's instructions for your chosen sealer.