Roll of Rot Guard wood rot barrier with a smaller sample pack on a white background
rot guard 5x5
RotGuard wood rot barrier packaging with a smaller card displaying the brand name on a white background
RotGuard™ - 20' Foot Roll RotGuard™ - 20' Foot Roll 20' Foot Roll - Fits All Post Sizes RotGuard™ self-adhesive wrap - Rot Barrier Fence Armor
RotGuard wood preservative packaging with a wooden post and soil background
graphic showing protected wood vs unprotected wood, caption reads "planting and saving tens of thousands of trees. Together"
Fence Armor RotGuard rot barrier system packaging with text on a grassy background
graphic showing sustainable investments, extended wood lifespan, and wood rot
graphic of a beautiful wood stained fence with rot guard around it
Wooden planks leaning against a wooden fence with 'Made in the USA' and warranty badge.
Advertisement for RotGuard Wood Rot Barrier with features listed on a green background
Step-by-step guide on applying a green and black product to a surface.
Roll of Rot Guard wood rot barrier with a smaller sample pack on a white background
rot guard 5x5
RotGuard wood rot barrier packaging with a smaller card displaying the brand name on a white background
RotGuard™ - 20' Foot Roll RotGuard™ - 20' Foot Roll 20' Foot Roll - Fits All Post Sizes RotGuard™ self-adhesive wrap - Rot Barrier Fence Armor
RotGuard wood preservative packaging with a wooden post and soil background
graphic showing protected wood vs unprotected wood, caption reads "planting and saving tens of thousands of trees. Together"
Fence Armor RotGuard rot barrier system packaging with text on a grassy background
graphic showing sustainable investments, extended wood lifespan, and wood rot
graphic of a beautiful wood stained fence with rot guard around it
Wooden planks leaning against a wooden fence with 'Made in the USA' and warranty badge.
Advertisement for RotGuard Wood Rot Barrier with features listed on a green background
Step-by-step guide on applying a green and black product to a surface.

RotGuard™ Self-Adhesive Post Wrap

ROTG-4x4SQ-1

FOR ADDED PROTECTION BELOW GROUND LEVEL

Protect your posts from the most common cause of failure: ground-line rot. RotGuard is a durable, self-adhesive barrier that seals out moisture, mold, and fungi where wood is most vulnerable.

It installs in minutes and adds long-term protection to any new or existing post, a simple upgrade that helps extend the life of your project and protect your investment.

Key Features
• Creates a moisture and rot-resistant barrier at ground level
• Self-adhesive design for quick and secure installation
• Helps prevent mold and fungi from attacking the wood
• Ideal for fence posts, deck posts, pergolas, and other outdoor structures

$6.99
$8.99
Size: 4x4

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Install RotGuard™ in Minutes

Product Overview Why Choose RotGuard™ Features & Benefits

Keep your wooden posts standing strong with RotGuard™. Designed to guard fence posts, deck posts, mailbox posts, and more against the most common cause of failure—ground-line rot—this durable, water-resistant wrap blocks moisture and fungal decay where it matters most.


Key Benefits

✅ Universal Fit: Works with most standard post sizes. Just cut, wrap, and go.

✅ Self-Adhesive Installation: No torch or special tools needed. Peel, wrap, and overlap for a clean, secure fit.

✅ 25-Year Warranty: Backed by our replacement guarantee for lasting peace of mind.

✅ Made in the USA: Built to withstand any climate with reliable performance.

✅ Cost-Effective: Prevent costly post replacements while maintaining curb appeal.

✅ Heat-Resistant: Won’t melt in hot trailers, trucks, or storage.


How It Works

RotGuard™ is a dual-layer, self-adhesive membrane that wraps tightly around posts before installation. Once applied, it forms a tough barrier at the ground-contact zone, resisting moisture, fungi, and decay—without heat, staples, or special tools.


Why Use a Post Wrap?

The ground line is the most vulnerable part of any wooden post. Exposure to soil, moisture, and microbes can quickly lead to rot. Fence post wraps like RotGuard™ offer an easy, affordable, and effective solution. They create a protective barrier that keeps moisture and oxygen out, extending the life of your posts and saving you time and money in the long run.


Do it once. Do it right. Protect your posts with RotGuard™.

Protect your wooden posts from ground-line rot and extend their life for decades with RotGuard™. Its advanced dual-layer design combines a tough polyethylene outer layer with a self-adhesive, water-resistant inner membrane, forming a reliable barrier where your posts are most vulnerable.


Quick and simple to install, RotGuard™ requires no torch, heat gun, or special tools, making it perfect for DIYers and professional contractors alike.


Cost-effective and versatile across different post types, RotGuard™ also helps reduce timber waste and limits the need for harsh soil chemicals.


A smart, sustainable choice for stronger, longer-lasting fences, decks, and outdoor structures.

Dual-Layer Protection

RotGuard™ combines a tough polyethylene outer layer with a self-adhesive, water-resistant inner membrane to create a strong barrier against moisture and oxygen—the main causes of ground-line rot.


Self-Adhesive & Easy to Install

No heat, torches, or special tools needed. Just peel, wrap, overlap, and press for a secure, clean fit. Fast and simple for homeowners and contractors alike.


20-Foot Roll

Cut to fit posts of any size or shape. Ideal for single mailbox posts or long fence lines, providing flexibility and value for every project.


Water-Resistant Seal

The self-adhesive membrane forms a reliable, water-tight seal at the ground-contact zone, protecting posts from rot and decay for decades.


Universal Application

Works on a wide variety of posts, including fences, decks, mailboxes, pergolas, and landscaping structures. One solution fits almost any outdoor wood project.


Environmentally Friendly

Reduces wood waste and minimizes chemical preservatives in the soil, making your projects more sustainable.