Protecting brick, concrete, and stone from moisture is essential for durability and energy efficiency. This guide highlights top masonry waterproofing products that combine deep penetration, breathability, and long-lasting protection. Each option is evaluated for residential and commercial use, from sealers and paints to concentrates and repairs. Explore a curated selection that addresses leaks, dampness, and freeze-thaw cycles without sealing in moisture.
| Product | Brand | What It Helps With |
|---|---|---|
| ChimneyRx Advanced Water Repellent | CHIMNEYRX | Breathable masonry sealer for brick, stone, and concrete |
| Stormdry Brick Sealer | Stormdry | Deep penetrating, 25-year protection for brick, stone, mortar |
| KILZ Basement and Masonry Waterproofing Paint | KILZ | Interior/exterior paint forming a water barrier on masonry |
| Eco Advance Concrete/Masonry Siloxane Waterproofer Concentrate | Eco Advance | Commercial-grade concentrate for multiple masonry surfaces |
| Drylok UGL White | Drylok | Masonry etch cleaner prep for waterproofing and painting |
Note: All five products are selected for relevance to masonry waterproofing needs, including breathability, long-term protection, and suitability for brick, concrete, and stone surfaces. Each entry provides a concise overview of core features and typical applications.
ChimneyRx Advanced Water Repellent
ChimneyRx’s Advanced Water Repellent uses a polysiloxane formula to deeply penetrate masonry surfaces, creating a breathable barrier that repels water while allowing moisture to escape. This helps prevent freeze-thaw damage and is suitable for brick, stone, and concrete. It can be applied over old outdoor stone sealers and works on surfaces treated with prior water-based or solvent-based products to enhance water resistance and fix leaks. The product is versatile for both residential and commercial masonry waterproofing projects, including chimney sealing and concrete sealing tasks.
Stormdry Brick Sealer
Stormdry Brick Sealer provides premium wall waterproofing for brick, stone, mortar, cement, sandstone, and granite. It forms an invisible water-repellent barrier through a single coat application and carries a 25-year protection claim against penetrating damp. The breathable formula enables masonry to dry naturally while preserving thermal properties of wall insulation. Note that performance may vary on limestone or painted surfaces.
KILZ Basement and Masonry Waterproofing Paint
This premium interior/exterior paint waterproofs and seals porous concrete and masonry surfaces. It uses nanotechnology to form a barrier against water infiltration while a durable alkali-resistant coating provides long-lasting decoration. It’s suitable for above and below-grade basement walls, masonry walls, stucco, brick, and more, with application guidance for rollers, brushes, or sprayers. Do not use on floors or on walls with active water leaks.
Eco Advance Siloxane Waterproofer Concentrate
Eco Advance offers a commercial-grade siloxane waterproofer concentrate that yields up to five gallons. It’s designed for concrete, brick, stucco, stone, EIFS, and pavers, forming a transparent barrier to repel water and extend surface life. The product protects against water damage, oil, deicing salts, and pool/spa chemicals, performing under challenging weather conditions while maintaining surface aesthetics and breathability.
Drylok UGL White
Drylok UGL White is a masonry etch and cleaner that prepares interior/exterior masonry and concrete for waterproofing and painting. It effectively removes efflorescence and excess mortar, making surfaces ready for sealers or paints. Coverage is approximately 300 square feet per 12-ounce container when used as a cleaner, or 150 square feet per 12-ounce container when used as an etch. This prep step helps ensure long-lasting waterproofing results.
Buying Guide: Key Considerations for Masonry Waterproofing
- Surface material and condition: Identify whether you’re sealing brick, concrete, stone, or stucco, and assess existing sealers or coatings to determine compatibility and needed surface prep.
- Breathability: Choose products that allow moisture vapor to escape to prevent moisture buildup and freeze-thaw damage inside walls.
- Penetration depth: Deep-penetrating sealers reduce water ingress and improve durability, especially on porous masonry.
- Coating type: Sealing paints offer decorative benefits and a surface barrier, while penetrating sealers preserve appearance and breathability.
- Application method and environment: Consider whether the product is suited for brushes, rollers, or sprayers, and whether outdoor exposure or indoor application is intended.
- Environmental and safety factors: Opt for non-toxic, low-VOC options where possible, especially for occupied spaces and pets.
- Maintenance and reapplication: Some products require reapplication every few years, while concentrates may extend coverage with dilution guidance.
- Surface prep needs: Etching or cleaning products may be needed prior to sealing to ensure adhesion and effectiveness.
- Warranty and claims: Review product warranties, coverage claims, and any limitations related to surface type or condition.
- Budget vs. performance: Weigh cost per square foot against longevity, protection level, and ease of use for the specific project.
Choosing the right masonry waterproofing product involves balancing surface type, climate exposure, and maintenance preferences. For best results, follow manufacturer instructions for surface prep, application conditions, and cure times, and consider a test patch before full-scale application.