Before you buy landscape adhesive, you need to know exactly how much to get. Too little and you're making a second trip mid-project. Too much and you've spent money you didn't need to. This guide gives you quick coverage numbers, a sizing table by project type, and a link to our free interactive calculator.
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Enter your area dimensions and material type — get an instant recommendation with pricing.
Open Coverage CalculatorCoverage at a Glance
One gallon of EcoLock HD covers the following areas with the recommended two-coat application:
If you're applying a single coat on flat ground with good conditions, you'll get roughly double these numbers. But two coats is the sweet spot for durability — especially on slopes or high-traffic areas.
How to Measure Your Area
For rectangular beds, multiply length by width in feet. A bed that's 20 feet long and 4 feet wide is 80 sq ft. For irregular shapes, break them into rough rectangles, calculate each one, and add them together. Don't stress about precision — round up to the nearest 50 sq ft to give yourself a small buffer.
Common bed sizes for reference:
| Area Type | Typical Size | Gallons Needed (Mulch) |
|---|---|---|
| Tree ring | 25–50 sq ft | ~0.5 gallon |
| Mailbox bed | 30–60 sq ft | ~0.5 gallon |
| Front walkway border | 80–200 sq ft | 1 gallon |
| Foundation planting bed | 150–400 sq ft | 1–2 gallons |
| Full front yard mulch | 400–800 sq ft | 2–4 gallons |
| Commercial / HOA bed | 1,000+ sq ft | 5+ gallons |
What Affects Coverage Rate?
Several factors determine whether you'll land on the high or low end of the coverage range:
Material type and size. Fine mulch and pine straw absorb less adhesive than chunky bark or large river rock. Smaller, tighter materials give you better coverage per gallon.
Mulch depth. The adhesive bonds the top 1–2 inches of material. If your mulch is only 2 inches deep, you'll use less product than on a 4-inch bed because you need less penetration.
Number of coats. One coat provides basic hold. Two coats (with 4–6 hours between them) provides significantly stronger bonding that lasts 18–24 months. We always recommend two coats.
Spray technique. An even, sweeping spray pattern from 8–12 inches above the surface uses product efficiently. Avoid pooling in one spot — light and even beats heavy and concentrated.
Which Size Should You Buy?
| Product | Best For | Coverage (2 coats) | Price |
|---|---|---|---|
| 1-Gallon EcoLock HD | Single beds, touch-ups, small projects | 100–193 sq ft | $49.99 |
| 2-Gallon EcoLock HD | Multiple beds, full yard, best value | 200–386 sq ft | $89.99 |
The 2-gallon jug saves you about $10 compared to buying two 1-gallon jugs individually — and it's the better choice if you're covering more than one bed or your total area exceeds 200 sq ft.
Not Sure? Use the Calculator
Enter your exact dimensions and material type to get a personalized recommendation.
Open Coverage CalculatorCovering a larger area? Save with EcoLock HD 2-Gallon Mulch Glue — covers up to 800 sq ft per jug (single coat) and ships ready to spray.