PROSOCO Sure Klean Weather Seal Siloxane PD - Durable Brick Sealer

In this review the PROSOCO Sure Klean Weather Seal Siloxane PD is evaluated as a long-term, water-repellent treatment for masonry. It is best for homeowners, contractors, and maintenance crews who want a breathable surface treatment that penetrates deeply and resists water intrusion over years. The single biggest reason to consider this product is its combination of deep penetration and an estimated service life of more than 10 years, which delivers protection against cracking, spalling and staining without trapping moisture in the substrate.

Key Features

• Deep penetration: Siloxane PD soaks into brick, concrete and stone to form a long-lasting barrier below the surface rather than a film on top.
• Water repellency: The sealer helps masonry resist water intrusion, reducing the risk of staining and freeze-thaw damage that leads to spalling.
• Breathable finish: Treated surfaces continue to breathe so trapped moisture is minimized and interior or wall assemblies are less likely to retain water.
• Long service life: Service life is estimated at more than 10 years, lowering maintenance frequency compared with short-lived coatings.
• Versatile substrate use: Designed for vertical and horizontal brick, concrete, masonry, stucco and manufactured stone for broad application on building exteriors.

Who It's For

This product suits homeowners maintaining older brick or stone exteriors, contractors specifying a breathable, long-lasting sealer for new or restored masonry, and facilities teams protecting horizontal surfaces like walkways or steps. It is also useful where stain resistance and prevention of water-related deterioration are priorities.

Those who need a decorative coating, a surface gloss, or an immediate impermeable membrane should look elsewhere; Siloxane PD is a penetrating, water-based sealer focused on protection rather than appearance change.

Pros & Cons

Pros

• Provides effective protection and water repellency that customers report reduces staining and moisture problems.
• Easy to apply with common tools; customers note it works well with a pump sprayer for fast coverage.
• Breathable treatment prevents trapped moisture, which helps reduce internal damage and long-term deterioration.
• Estimated service life over 10 years cuts down on frequent reapplications and maintenance costs.

Cons

• As a penetrating siloxane treatment, it does not change surface appearance or provide a film finish, so it is not suitable where cosmetic alteration is required.
• Performance depends on substrate preparation and application technique, so improper application may reduce effectiveness.

Specifications

Product type	Water-based siloxane penetrating sealer
Suitable substrates	Brick, concrete, masonry, stucco, manufactured stone
Application areas	Vertical and horizontal surfaces
Breathability	Treated surfaces breathe; does not trap moisture
Estimated service life	More than 10 years
Primary benefit	Long-lasting water repellency and protection

Our Verdict

PROSOCO Sure Klean Weather Seal Siloxane PD is a practical choice for anyone needing long-term, breathable protection for masonry. It delivers deep-penetrating water repellency with minimal upkeep and is good value for projects where preservation and moisture resistance are priorities rather than cosmetic change.

Frequently Asked Questions

Will this sealer change the look of my brick?
Answer. It penetrates rather than films, so appearance changes are minimal; it is not intended to add gloss or color.

Can it be used on horizontal surfaces like walkways?
Answer. Yes, it is formulated for both vertical and horizontal brick, concrete and masonry applications.

How long does protection last?
Answer. The manufacturer estimates a service life of more than 10 years under normal exposure conditions.