$58.33
Patching Compound – 1 Gallon
Step 1 of the All Deck Waterproof System. Professional-grade patching compound fills cracks, levels uneven surfaces, and repairs damaged substrate before waterproof membrane application. Coverage: 12 sq ft/gallon at 1/8″ thickness.
Description
All Deck Patching Compound — Substrate Preparation & Leveling
All Deck Patching Compound is the essential first step in any deck waterproofing project. This professional-grade compound fills cracks, levels uneven surfaces, repairs damaged plywood seams, and creates the smooth, uniform substrate required for a successful waterproof membrane application.
Why Proper Patching Matters
The waterproof membrane is only as good as the substrate beneath it. Cracks, gaps, uneven seams, and surface imperfections will telegraph through the fiberglass membrane, creating stress points that can lead to premature failure. All Deck Patching Compound is formulated to bond permanently to plywood and concrete, providing a stable, level surface for the laminating resin and fiberglass system.
Technical Specifications
| Property | Value |
|---|---|
| Coverage Rate | 12 sq ft per gallon at 1/8″ thickness |
| Application Method | Trowel or putty knife |
| Dry Time | 1-2 hours (light sanding), 4 hours (overcoat) |
| Maximum Depth | 1/4″ per application (build in layers for deeper fills) |
| Substrate Compatibility | Plywood, concrete, existing coatings |
| System Position | Step 1 of 5 in the All Deck Waterproof System |
Common Applications
- Filling plywood seams and joints
- Leveling low spots and depressions
- Repairing damaged or deteriorated substrate areas
- Smoothing rough concrete surfaces
- Building up cove details at wall-to-deck transitions
Pro Tip
For plywood seams wider than 1/8″, apply patching compound in two thin layers rather than one thick layer. This prevents shrinkage cracking and ensures a solid, permanent repair. Always sand smooth after curing — the membrane will conform to every surface imperfection.
Frequently Asked Questions
How much patching compound do I need?
For a typical deck with standard plywood seams, plan for approximately 1 gallon per 100 sq ft of deck area. Decks with significant damage or many low spots may require more.
Can I use regular wood filler instead?
No. Standard wood fillers are not formulated for exterior waterproofing applications and will not bond properly with the All Deck laminating resin system. Use only All Deck Patching Compound for warranty coverage.
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| Coverage | As needed for repairs |
| Method | Apply with trowel or putty knife; feather edges smooth |
| Dry Time | 2–4 hours before overcoating |
| Fire Rating | N/A (prep product) |
- Concrete
- Plywood
- Magnesite
- Cement board
- Metal
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How Much Do I Need?
Enter your project area to calculate the quantity needed.
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Coverage Calculator
Patching Compound - 1 Gallon covers approximately 250 sq ft per gallon
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