The RotGuard™ 6x6 Series is a precision-sized, self-adhesive wood post wrap engineered for larger 6x6 posts, including common nominal 5.5” × 5.5” posts found across the northern U.S. and Canada, as well as true dimensional 6x6 and rough-sawn timber.
Sized to fit posts up to 6.125”, this 16-inch wrap protects the soil-line zone where rot begins, and structural strength is most at risk.
When you build with heavier posts for frost depth, wind load, gates, long spans, or structural applications, the protection system should match the investment.
Ships next business day from Pennsylvania (U.S.) or Ontario (Canada).
Install once. Protect structural performance for decades.
Product Overview |
6x6 posts are chosen for strength.
They’re used in:
• Gate hinge posts
• Privacy fence corners
• Deck supports
• Pergola columns
• Structural landscape builds
• Harsh climate installations
But no matter how large the post, wood fails at the same vulnerable location, the ground line.
RotGuard™ wraps are 16 inches long, approximately 2 inches longer than many traditional rot barriers, providing additional coverage above and below the critical ground-line zone where posts most commonly fail.
At this transition zone:
• Moisture remains trapped
• Oxygen is present
• Moderate temperatures that support fungal activity
• Freeze–thaw cycles stress the fibers
• Soil organisms accelerate decay
RotGuard™ forms a durable waterproof membrane at this critical point, helping reduce moisture intrusion and limit the conditions that lead to ground-line rot.
Even the strongest post deserves protection where it matters most.
Key Features
✔ Engineered for 6x6 Posts
Fits square or round posts up to 6.125”, including nominal 5.5” × 5.5” and true dimensional 6x6 lumber.
✔ Cold-Bond, Self-Adhesive Install
No torch. No heat gun. No open flame. Peel, wrap, overlap, and press.
✔ SBS Polymer-Modified Membrane
Rubberized, flexible waterproofing compound designed for long-term adhesion.
✔ 16-Inch Soil-Line Coverage
Protects the most vulnerable ground-contact zone above and below grade.
✔ Heat Stable for Job Sites
Will not melt in hot trailers or work trucks.
✔ Made in USA
✔ Backed by a 25-Year Limited Warranty
When installed on pressure-treated lumber or heartwood cedar.
Ideal Applications
• Gate posts and hinge posts
• Fence corner and end posts
• Deck support posts
• Pergola columns
• Structural landscape posts
• Pole barn framing
How RotGuard™ Works |
Engineered for Larger Timber Movement
RotGuard™ is manufactured using SBS-modified bitumen, a polymer-enhanced waterproofing membrane used in demanding structural applications where flexibility and adhesion are critical.
SBS (Styrene-Butadiene-Styrene) provides rubber-like elasticity and cold-flow bonding performance, allowing the membrane to conform tightly to wood fibers without heat activation.
This is especially important on 6x6 lumber because:
• Larger posts experience greater seasonal expansion and contraction
• Rough-sawn timber surfaces vary more
• Heavier structural loads increase stress at the soil line
Unlike heat-shrink or torch-applied sleeves that can cool, harden, and separate over time, RotGuard™ remains flexible and maintains continuous contact with the wood.
This isn’t just a coating. It’s an engineered ground-line protection system built for structural-grade posts.
Do it once. Do it right.
Complete Structural Post Protection
Ground-line protection is the foundation. Long-term structural performance depends on protecting every exposure zone.
For maximum durability on larger builds:
• Protect the above-grade transition area with PostGuard™ to help prevent impact damage from equipment and preserve membrane integrity.
• Shield exposed end grain with CapClaw™ to reduce water infiltration and internal moisture migration.
• Maintain long-term performance and appearance with Expert Professional Wood Care designed to manage UV exposure and surface moisture cycling.
When you invest in 6x6 structural posts, protecting all critical zones ensures the build performs as intended for decades.
Frequently Asked Questions |
Will this fit standard 5.5” × 5.5” posts from a box store?
Yes. The RotGuard™ 6x6 Series is designed for nominal 6x6 posts (typically 5.5” × 5.5”) and fits up to 6.125”.
Does it also work on true-dimensional or rough-sawn 6x6?
Yes. This wrap is built to accommodate larger and less uniform lumber surfaces up to 6.125”.
Is heat required?
No. RotGuard™ installs as a cold-bond, self-adhesive membrane — no torch needed.
Can I install it after the post is set?
No. RotGuard™ must be applied before ground placement.
Can it be used on metal posts?
Yes. While designed for wood, it can help reduce corrosion in harsh or acidic soils.
RotGuard™ is designed for installation on wood posts before ground placement. Proper installation according to guidelines is required for warranty coverage. Performance may vary depending on soil conditions, drainage, climate, and overall post-maintenance. For full warranty terms and safety information, please refer to the Warranty and SDS documentation.
RotGuard™ is not classified as a hazardous material under OSHA HazCom standards. See SDS for details.
The RotGuard™ 6x6 Series is a precision-sized, self-adhesive wood post wrap engineered for larger 6x6 posts, including common nominal 5.5” × 5.5” posts found across the northern U.S. and Canada, as well as true dimensional 6x6 and rough-sawn timber.
Sized to fit posts up to 6.125”, this 16-inch wrap protects the soil-line zone where rot begins, and structural strength is most at risk.
When you build with heavier posts for frost depth, wind load, gates, long spans, or structural applications, the protection system should match the investment.
Ships next business day from Pennsylvania (U.S.) or Ontario (Canada).
Install once. Protect structural performance for decades.
Product Overview |
6x6 posts are chosen for strength.
They’re used in:
• Gate hinge posts
• Privacy fence corners
• Deck supports
• Pergola columns
• Structural landscape builds
• Harsh climate installations
But no matter how large the post, wood fails at the same vulnerable location, the ground line.
RotGuard™ wraps are 16 inches long, approximately 2 inches longer than many traditional rot barriers, providing additional coverage above and below the critical ground-line zone where posts most commonly fail.
At this transition zone:
• Moisture remains trapped
• Oxygen is present
• Moderate temperatures that support fungal activity
• Freeze–thaw cycles stress the fibers
• Soil organisms accelerate decay
RotGuard™ forms a durable waterproof membrane at this critical point, helping reduce moisture intrusion and limit the conditions that lead to ground-line rot.
Even the strongest post deserves protection where it matters most.
Key Features
✔ Engineered for 6x6 Posts
Fits square or round posts up to 6.125”, including nominal 5.5” × 5.5” and true dimensional 6x6 lumber.
✔ Cold-Bond, Self-Adhesive Install
No torch. No heat gun. No open flame. Peel, wrap, overlap, and press.
✔ SBS Polymer-Modified Membrane
Rubberized, flexible waterproofing compound designed for long-term adhesion.
✔ 16-Inch Soil-Line Coverage
Protects the most vulnerable ground-contact zone above and below grade.
✔ Heat Stable for Job Sites
Will not melt in hot trailers or work trucks.
✔ Made in USA
✔ Backed by a 25-Year Limited Warranty
When installed on pressure-treated lumber or heartwood cedar.
Ideal Applications
• Gate posts and hinge posts
• Fence corner and end posts
• Deck support posts
• Pergola columns
• Structural landscape posts
• Pole barn framing
How RotGuard™ Works |
Engineered for Larger Timber Movement
RotGuard™ is manufactured using SBS-modified bitumen, a polymer-enhanced waterproofing membrane used in demanding structural applications where flexibility and adhesion are critical.
SBS (Styrene-Butadiene-Styrene) provides rubber-like elasticity and cold-flow bonding performance, allowing the membrane to conform tightly to wood fibers without heat activation.
This is especially important on 6x6 lumber because:
• Larger posts experience greater seasonal expansion and contraction
• Rough-sawn timber surfaces vary more
• Heavier structural loads increase stress at the soil line
Unlike heat-shrink or torch-applied sleeves that can cool, harden, and separate over time, RotGuard™ remains flexible and maintains continuous contact with the wood.
This isn’t just a coating. It’s an engineered ground-line protection system built for structural-grade posts.
Do it once. Do it right.
Complete Structural Post Protection
Ground-line protection is the foundation. Long-term structural performance depends on protecting every exposure zone.
For maximum durability on larger builds:
• Protect the above-grade transition area with PostGuard™ to help prevent impact damage from equipment and preserve membrane integrity.
• Shield exposed end grain with CapClaw™ to reduce water infiltration and internal moisture migration.
• Maintain long-term performance and appearance with Expert Professional Wood Care designed to manage UV exposure and surface moisture cycling.
When you invest in 6x6 structural posts, protecting all critical zones ensures the build performs as intended for decades.
Frequently Asked Questions |
Will this fit standard 5.5” × 5.5” posts from a box store?
Yes. The RotGuard™ 6x6 Series is designed for nominal 6x6 posts (typically 5.5” × 5.5”) and fits up to 6.125”.
Does it also work on true-dimensional or rough-sawn 6x6?
Yes. This wrap is built to accommodate larger and less uniform lumber surfaces up to 6.125”.
Is heat required?
No. RotGuard™ installs as a cold-bond, self-adhesive membrane — no torch needed.
Can I install it after the post is set?
No. RotGuard™ must be applied before ground placement.
Can it be used on metal posts?
Yes. While designed for wood, it can help reduce corrosion in harsh or acidic soils.
RotGuard™ is designed for installation on wood posts before ground placement. Proper installation according to guidelines is required for warranty coverage. Performance may vary depending on soil conditions, drainage, climate, and overall post-maintenance. For full warranty terms and safety information, please refer to the Warranty and SDS documentation.
RotGuard™ is not classified as a hazardous material under OSHA HazCom standards. See SDS for details.
What the Pros Think of Fence Armor® Post Protector Products
