Using joint sealer effectively helps protect surfaces like pavers, concrete, and natural stone, enhancing durability and preventing weed growth. The exact process can vary slightly depending on the specific type of joint material (like sand or mortar) and the sealer product, but generally involves thorough preparation followed by careful application.
Preparing the Surface
Proper preparation is crucial for successful joint sealing.
- Clean Thoroughly: Begin by removing all dirt, debris, stains, and existing sealers from the surface and joints. A pressure washer or specialized cleaning agents may be necessary depending on the condition. Ensure the surface is completely dry before proceeding.
- Repair Joints: Address any damaged or missing joint material. For surfaces like pavers with sand joints, ensure the joints are filled to the appropriate level with dry joint sand.
- Compact Sand Joints: According to best practices for stabilizing sand joints before sealing, once the sand is in the joints, clear the surface entirely. Then, make one pass with a compactor to remove any air pockets in the joints. This step helps settle the sand, which you'll notice has settled somewhat, ensuring a solid base before sealing.
Applying Joint Sealer
The application method depends on the sealer type and the size of the area.
- Choose the Right Sealer: Select a sealer appropriate for your surface material and desired finish (e.g., matte, wet look, stabilizing).
- Application Method: Sealers can be applied using:
- Sprayers: Often used for large areas, providing even coverage.
- Rollers: Suitable for various surfaces, especially flat ones.
- Brushes: Ideal for small areas or detailed work.
- Apply Evenly: Apply the sealer uniformly, ensuring it penetrates the joints adequately. Avoid pooling on the surface. Work in manageable sections.
- Multiple Coats: Some sealers recommend a second coat after the first has dried sufficiently, typically applied perpendicular to the first coat for better coverage.
Drying and Curing
Allow the sealer to dry completely according to the manufacturer's instructions.
- Drying Time: This varies based on the product, temperature, humidity, and ventilation. It can range from a few hours to a day for foot traffic.
- Curing Time: Full curing, where the sealer reaches maximum hardness and protection, can take longer, sometimes several days or even weeks. Avoid heavy traffic or exposure to moisture during the curing period.
Quick Reference Table:
| Step | Action | Note |
|---|---|---|
| Preparation | Clean surface & joints. Fill/repair joints. | Ensure dry. |
| Sand Joint Prep | Clear surface after filling sand. Compact sand joints (1 pass). | Removes air pockets, settles sand (as per reference). |
| Application | Apply chosen sealer evenly using sprayer, roller, or brush. | Avoid pooling. |
| Multiple Coats | Apply second coat if recommended after first coat dries. | Usually perpendicular to first coat. |
| Drying & Curing | Allow sufficient time for drying (foot traffic) and full curing. | Check product instructions. Avoid moisture during curing. |
Following these steps, including the crucial preparation steps like clearing and compacting sand joints where applicable, will help ensure your joint sealer performs effectively, protecting your paved surfaces for years to come.
