# ProWood 1-5/8 in. x 50 ft. Black Butyl Deck Joist Tape for under Decking Board

**Brand:** [ProWood](https://shop.coreranger.com/brands/ProWood)
**SKU:** 398228
**Price:** $19.98 · in stock
**URL:** https://shop.coreranger.com/product/prowood-1-5-8-in-x-50-ft-black-butyl-deck-joist-tape-for-under-decking-board-311992207

## Specifications

| Spec | Value |
|---|---|
| Model # | 398228 |
| Internet # | 311992207 |
| Returnable | 90-Day |
| Store SKU # | 1005011955 |
| Accessory Type | Post Wrap |
| Manufacturer Warranty | N/A |
| Decking Material Compatibility | Wood |

## Description

Protect deck framing and help extend the life of outdoor structures with this 1‑5/8 in. x 50 ft. black butyl deck joist tape, designed to provide a durable moisture barrier between decking boards and the underlying substructure. Made from flexible butyl rubber, this peel‑and‑stick joist tape creates a waterproof seal that helps prevent water from collecting on joists, beams, and ledger surfaces where rot and decay often begin. The self‑sealing material conforms around screws and fasteners, blocking common moisture entry points while allowing decking boards to be installed normally. Suitable for use with pressure‑treated lumber, untreated wood, and composite decking systems, this joist tape also helps reduce corrosion when placed between treated wood and metal hardware. Easy to apply during new deck construction or repairs, it installs directly over clean, dry framing surfaces for consistent coverage. Intended for residential decking applications when used as part of a properly built, code‑compliant deck system, this butyl joist tape is a practical upgrade that helps preserve structural integrity, reduce maintenance concerns, and protect your deck investment over time.

• Apply tape to the top of joists to protect your deck substructure
• Creates a waterproof membrane that prevents wood rot and decay
• Self-adhesive tape that is easy to install