If you’re painting or staining a deck, finishing between boards is essential for a smooth, professional look. The best tools for painting between deck boards help you reach tight gaps, prevent drips, and ensure even coverage across surfaces. This guide highlights five top picks, explains who they’re best for, and shows how to choose the right tool for your project. Ideal buyers include DIY homeowners, weekend warriors, and professional deck workers who want precise results with less mess.
| Product | Best For |
|---|---|
| Shur-Line 1791257 Deck Stain Pad with Groove Tool | Staining between boards and flat surfaces in one pass |
| Shur-Line 2007090 Premium Deck & Fence Stain Pad w/Groove Tool | Expanded capability for staining decks and fences |
| Shur-Line 1791258 Deck, Stain Pad w/Groove Tool Refill | Reusable system for controlled staining and reduced mess |
| CroBlissful 8 Pcs Deck Spacers 1/8 and 3/16 Inch | Precise board spacing to accommodate expansion |
| GACDR Slant Lining Fitch Trim Paint Brushes (Pack) | Fine edging and trim work near deck gaps |
Shur-Line Deck Stain Pad With Groove Tool

The Shur-Line 1791257 is a stain pad designed to cover flat surfaces and between boards in a single pass. The wrapped edge helps prevent tearing from rough wood, screws, or nail heads, and it is threaded for use on an extension pole. Best for: DIY deck staining projects where you want to minimize tool changes and achieve consistent coverage between boards. Limitation: may require careful handling on very rough wood to avoid edge fraying.
Shur-Line Premium Deck & Fence Stain Pad w/Groove Tool

Shur-Line’s premium pad is designed for both deck and fence staining. The model features a heavy-duty plastic build and measures about 7 5/8 inches by 6 1/2 inches. Best for: projects needing a wider staining tool for faster coverage on larger deck sections while maintaining control. Limitation: the pad is a single unit with a specific pad size; consider additional refills if staining extensive areas.
Shur-Line Deck Stain Pad Refills with Groove Tool

This refill kit provides a reusable stain system to reduce mess compared with brushes or rollers. It is designed to prevent dripping, pooling, and streaking for even coverage and accuracy. Best for: extending the life of a staining system and maintaining consistent results. Limitation: requires the main groove tool assembly to be effective, so stock up on refills before a large project.
CroBlissful Deck Spacers 8 Pcs

These spacers come in 1/8″ and 3/16″ edges to keep deck boards evenly spaced for expansion and contraction. The bright colors aid quick identification on the job site. Best for: ensuring uniform gaps across pressure-treated, composite, PVC, and hardwood boards. Limitation: spacer kits must be used consistently to prevent inconsistent gaps on curved or irregular layouts.
GACDR Slant Lining Fitch Trim Paint Brushes

This pack of six angled brush sizes (0.5″, 0.75″, 1″) focuses on trim and edging precision. The synthetic bristles hold paint well for a smooth, streak-free edge along deck gaps and trim lines. Best for: tight-cutting and precise edging near between-board areas. Limitation: small sizes require careful handling for larger stain areas between boards.
Buying Guide
Key considerations when choosing tools for painting between deck boards include the size of your deck, the wood variety, and the finish you want. For between-board staining, use a groove tool or stain pad that can reach tight gaps without dripping. If you’re staining large flat areas, a wider pad can speed coverage, but ensure you can control it near gaps. Spacers help maintain consistent gaps for expansion and contraction, which is crucial with temperature and moisture changes. For edging and trim, angled brushes provide precision along board edges.
- What size pad is best for my deck? Choose 7–8 inch pads for larger decks and smaller sizes (3–6 inches) for tight, irregular boards or detailing near gaps.
- Should I use spacers in addition to stain pads? Yes, spacers help maintain uniform deck gaps, which improves the final appearance and reduces warping risk.
- Are refills worth it? Refills reduce waste and mess, especially for large projects, but ensure compatibility with your groove tool system.
- What finishes do groove tools support? Most groove tools work with water- or oil-based stains and sealers; verify compatibility with your product.
- How do I avoid drips between boards? Use a groove tool with wrapped edges and maintain steady pressure to prevent pooling in gaps.
Frequently Asked Questions
- What tool is best to stain between deck boards? A groove tool with a stain pad designed for precise edges helps reach between boards for even coverage.
- Can spacers be reused for multiple projects? Yes, most spacers are durable and reusable, though inspect for wear before reuse.
- Do I need different tools for fence and deck staining? For larger areas, a wider pad helps, but a groove tool is useful for both deck boards and fencing gaps.
- Are refill pads necessary? They reduce mess and improve control, especially on extended projects.
- How do I choose between oil-based and water-based stains? Check the product’s compatibility with your chosen groove tool and the wood type to avoid uneven absorption.
- Will these tools work on pressure-treated lumber? Yes, spacers and groove pads are designed to work across common deck materials, including pressure-treated wood.