Answering the top question for buyers: which sealants work best on block paving and why. This guide compares five select products to help you choose a durable, weather-resistant sealant for patios, driveways, and walkways. Suitable for homeowners seeking long-lasting protection, contractors managing outdoor hardscapes, and DIY enthusiasts wanting straightforward application. The list covers water-based and solvent-based options, penetrating sealers, and polyurethane sealants to address different porosities and finish preferences.
| Product | Best For | Finish | Key Benefit |
|---|---|---|---|
| Ames Block & Wall Liquid Rubber | Basements, foundations, and moisture-prone areas | White | Multi-purpose waterproofer and coating |
| MasonryDefender Patio Paver Sealer | Outdoor patios and stone pavers | Clear, low gloss | Water-based protection with joint stabilization |
| PLINTEX Penetrating Sealer | Porous stone, concrete, and driveways | Natural finish | Deep penetrating, water & stain repellent |
| Concrete Crack Filler 3-Pack | Crack sealing for driveways and foundations | Gray | Oil-based, self-leveling, weather-resistant |
| SIKA Sikaflex Construction Sealant | Joints and edges around masonry and concrete | Natural/paintable | Strong, elastic, paintable sealant |
Ames Block & Wall Liquid Rubber Waterproofer
Best for moisture-prone areas and concrete surfaces needing a flexible coating. This 1-gallon sealant is billed as a multipurpose waterproofer and coating suitable for basements and foundations, offering a white finish that can help reflect sunlight and highlight treated areas. The product is produced in the USA, with a weight of 9.25 lb and more suitable for indoor or sheltered outdoor use where moisture is a concern. Use this when you want a single sealant that serves as both surface coating and moisture barrier.
- Best for: moisture-prone blocks, foundation surfaces, and indoor-outdoor transitions.
- Why chosen: strong water sealing capability and versatility as a coating.
- Caution: wash/application conditions must be dry; color is white and may affect appearance on darker pavers.
MasonryDefender Patio Paver Sealer
This low-gloss, water-based clear sealer is designed to protect outdoor stone and paver surfaces while preserving a natural look. It dries clear, minimizes color fading, and prevents yellowing—useful for clay brick, paver stones, and general stone surfaces. It also helps stabilize joint sand, potentially reducing weed growth. Better for homeowners seeking a subtle, natural finish that maintains the stone’s appearance and enhances longevity.
- Best for: outdoor patios, pavers, and stone surfaces that should look natural.
- Why chosen: clear finish with low gloss and joint stabilization benefits.
- Caution: may require reapplication over time with heavy UV exposure or wear from traffic.
PLINTEX Penetrating Stone & Concrete Sealer
Best for deep protection on porous stone and concrete surfaces. This quart-sized sealer penetrates pores to repel water, moisture, dirt, and stains, offering a natural finish. It helps protect patios, facades, and walkways, and is suitable for a broad range of absorbent stones, including concrete pavers and brick. Choose this when you want a long-lasting, low-gloss surface protection that preserves texture and color.
- Best for: porous stones and concrete surfaces needing deep sealing.
- Why chosen: penetrating sealer provides durable water and stain resistance without a heavy film.
- Caution: may alter the appearance of very dark stones; verify color in a discreet test area first.
Concrete Crack Filler 3-Pack (Oil-Based)
Best for sealing cracks in driveways, patios, garages, and foundations. This oil-based, self-leveling sealant forms a durable, weather-resistant seal that can withstand heavy traffic and freeze-thaw cycles. It cures in 24–48 hours and is suitable for indoor and outdoor use. A caution is to avoid application before rain and ensure at least 48 hours of dry weather after applying for optimal results.
- Better for: filling and sealing visible cracks before applying surface coatings.
- Why chosen: self-leveling and strong adhesion for long-term crack mitigation.
- Caution: sensitive to weather; plan for dry windows to cure properly.
SIKA Sikaflex Construction Sealant
Best for sealing joints, gaps, and edges in brickwork, masonry, wood, and concrete. This polyurethane sealant offers strong adhesion and elasticity to handle movement without cracking. It is paintable and can be stained, which helps to integrate with surrounding surfaces. Choose this if you need a flexible, durable seal that blends with the existing aesthetic and resists moisture infiltration.
- Best for: tight joints, cracks, and gaps around masonry and wood framing.
- Why chosen: high elasticity prevents tearing under thermal movement.
- Caution: ensure proper curing conditions; some surfaces may require priming or painting after application.
Buying Guide: Key Considerations For Block Paving Sealants
What should guide your choice? Start with the surface type and climate. Porous stone and concrete often benefit from penetrating sealers that block water ingress without forming a thick film. For surfaces with high foot traffic or freeze-thaw cycles, oil-based or polyurethane sealants can offer stronger adhesion and longevity, but may require longer cure times. If you prefer a natural look, choose water-based clear sealers with low gloss. For structural joints, consider products that stabilize joint sand and resist weed growth. Always check VOC compliance, drying times, and whether the finish will alter color or texture of your pavers.
Practical How-To Considerations
- Surface prep: clean and dry the area before applying any sealer or filler.
- Weather window: plan applications during dry, mild weather for best cure.
- Test area: test a small inconspicuous patch to confirm color and finish.
- Reapplication: sealers may require periodic reapplication depending on UV exposure and wear.
Frequently Asked Questions
- Q: Do penetrating sealers change the color of block paving?
- A: Penetrating sealers generally do not alter color, but always test a small area first.
- Q: How long should sealer cure before exposure to rain?
- A: Check product-specific guidance; many require 24–48 hours of dry weather.
- Q: Can I seal over a DIY crack filler?
- A: It depends on the filler; ensure compatibility and allow filler to fully cure before sealing over it.
- Q: Which sealant is best for weed prevention in joints?
- A: Sealers that stabilize joint sand and inhibit moisture penetration are preferred for weed control.
- Q: Are water-based sealers safer for the environment?
- A: Water-based sealers typically have lower VOCs and may be more user-friendly in enclosed areas.
- Q: Is painting required after applying sealant on joints?
- A: Some sealants can be painted after curing; check if the product is paintable and follow guidance.