# ProWood 3-1/8 in. x 50 ft. Black Butyl Deck Joist Tape for Under Decking Board

**Brand:** [ProWood](https://shop.coreranger.com/brands/ProWood)
**SKU:** HD337029938
**Price:** $42.45 · in stock
**URL:** https://shop.coreranger.com/product/prowood-3-1-8-in-x-50-ft-black-butyl-deck-joist-tape-for-under-decking-board-337029938

## Specifications

| Spec | Value |
|---|---|
| Model # | 398229 |
| Internet # | 337029938 |
| Returnable | 90-Day |
| Store SKU # | 1014422988 |
| Accessory Type | Installation Tool |
| Manufacturer Warranty | N/A |
| Decking Material Compatibility | Wood |

## Description

Protect your deck substructure with 3-1/8 in. x 50 ft. Black Butyl Deck Joist Tape. This self-adhesive tape creates a waterproof membrane that prevents wood rot and decay caused by moisture accumulation under deck boards. Made from durable butyl rubber, it aggressively self-seals around screws and nails, blocking water's primary pathway into the wood. Easy to apply, this tape is perfect for extending the life of your deck. Ensure you have enough for your whole project, as no deck is complete without proper moisture protection.

• Apply tape to the top of joists to protect deck's substructure
• Self-adhesive tape creates waterproof seal to stop rot and decay
• Can be used in direct contact with pressure-treated lumber