Description
Protect your timber decking frame and maximize the lifespan of your deck with Composite Prime HD Protect Tape. Even pressure-treated timber subframes are susceptible to rot and moisture degradation over time—especially around fixings and water-trapping joist tops. This heavy-duty, self-adhesive flashing tape creates a durable, waterproof barrier that seals your joists and prevents long-term timber decay.
Engineered by trade leaders Composite Prime, HD Protect Tape offers effortless peel-and-stick application. Its self-sealing compound tightly hugs decking screws as they drive through, keeping moisture out of vulnerable fixings and screw lines. Finished in a clean, subtle black finish, it blends discreetly into the shadows between your deck boards for a sleek, professional look.
Key Features & Benefits
-
Waterproof & Self-Sealing: Creates a watertight seal across the top of timber joists and automatically seals around deck screws to block moisture ingress.
-
Optimal 63mm Width: Specifically sized at 63mm to provide full coverage for standard 2″ (47mm–50mm) timber joists with overhang to shed water efficiently.
-
Self-Adhesive & Easy to Fit: No special tools, glues, or messy mastics required—simply peel, place, and stick to treated or untreated wood.
-
Discreet Black Finish: Conceals light timber joists through gaps between decking boards for an ultra-clean visual finish.
-
Prevents Timber Rot: Extends the structural lifespan of your timber subframe to match the long-lasting performance of composite boards.
Technical Specifications
| Feature | Specification |
| Brand | Composite Prime |
| Product | HD Protect Tape |
| Roll Width | 63mm |
| Roll Length | 20m |
| Material / Type | Heavy-duty self-adhesive flashing tape |
| Color | Black |
| Substrate Compatibility | Treated & Untreated Timber (including C24 structural joists) |
| Suitable Board Types | All composite & timber decking ranges |
How to Install
-
Clean the Surface: Ensure timber joists are dry and free from dust, dirt, or loose debris.
-
Apply the Tape: Align the 63mm tape centered along the top of the joist and roll it down smoothly.
-
Press to Seal: Firmly press down along the entire length to eliminate air bubbles and activate the heavy-duty adhesive.
-
Lay Decking: Secure your composite or timber deck boards directly over the taped joists using your standard clips or screws.
