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    • Fences
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    • Catalyst 5" x 5" Standard Internal Post Cap
  • 5" x 5" Standard White Internal Post Cap - Detailed View
  • 5" x 5" Standard White Internal Post Cap
  • 5" x 5" Standard Sand Internal Post Cap
  • 5" x 5" Standard Clay Internal Post Cap
  • 5" x 5" Standard White Internal Post Cap - Detailed View 5" x 5" Standard White Internal Post Cap 5" x 5" Standard Sand Internal Post Cap 5" x 5" Standard Clay Internal Post Cap

    Catalyst 5" x 5" Standard Internal Post Cap

    Catalyst

    MSRP:
    Now: $2.49
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    SKU:
    CATALYST-STANDARD-INTERNAL-CAP
    Availability:
    Typically Ships in 3 Weeks. Ships Direct from Manufacturer.

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    Product Description

    Catalyst 5" x 5" Standard Internal Pyramid Post Cap — White, Sand, Clay

    • Clean, classic finish — Low-profile pyramid cap delivers a crisp, finished look on 5" x 5" vinyl fence posts.
    • Internal fit design — Inserts into the post opening for a secure, streamlined appearance with no external overhang.
    • Color-matched solids — Available in White, Sand, and Clay to coordinate with Catalyst vinyl fence systems.
    • Weather ready — UV-stabilized, fence-grade vinyl resists fading, moisture, and temperature swings.
    • Universal across layouts — Ideal for line, corner, and gate/end posts on any Catalyst fence using 5" x 5" posts.

    The Catalyst 5" x 5" Standard Internal Pyramid Post Cap provides a clean, professional-grade finish for Catalyst vinyl fence posts where a flush, low-profile appearance is preferred. Designed to seat inside standard 5" x 5" posts, this cap protects the post interior from moisture and debris while maintaining straight, uninterrupted sightlines across the fence line. Offered in three core solid colors—White, Sand, and Clay—it integrates seamlessly with Catalyst privacy, picket, and ranch rail fence systems for both new installations and replacement projects.

    Why Choose This

    • Flush internal profile — Sits inside the post for a sleek, integrated look without exposed edges.
    • Consistent contractor fit — Designed for standard Catalyst 5" x 5" vinyl posts with predictable internal tolerances.
    • Unified fence aesthetics — Solid color options keep posts visually consistent across long runs and transitions.

    Specifications

    Product Catalyst Standard Internal Pyramid Post Cap
    Fit / Size Internal insert for 5" x 5" vinyl fence posts
    Profile Pyramid (low-profile peak)
    Colors White, Sand, Clay (solid, smooth finish)
    Material Fence-grade vinyl with UV inhibitors
    Use Locations Line, corner, and gate/end posts on Catalyst fences using 5" x 5" posts
    Maintenance No paint or staining required; clean with mild soap and water
    Compatibility Catalyst vinyl fence systems utilizing standard 5" x 5" posts

    Installation (Quick Steps)

    • Confirm post opening — Verify the post is a standard 5" x 5" vinyl post.
    • Clean interior — Remove debris and moisture from inside the post.
    • Adhesive if needed — In windy or exposed locations, apply a small bead of exterior-grade vinyl adhesive inside the post.
    • Insert and seat — Press evenly until the cap sits flush with the post top.

    Frequently Asked Questions

    Does this cap fit every 5" x 5" post?
    This cap is designed for standard 5" x 5" vinyl posts used across Catalyst systems. Always dry-fit to confirm internal tolerances.
    Will the colors match my fence?
    Yes. White, Sand, and Clay are core solid colors used across Catalyst vinyl fence systems.
    Should I glue internal post caps?
    Adhesive is optional but recommended in high-wind or high-exposure installations.
    What is the advantage of an internal post cap?
    Internal caps provide a flush appearance and reduce visible edges compared to slip-over external caps.
    Are post caps included with Catalyst posts?
    No. Post caps are sold separately so you can select the profile and style that best fits your project.

    Comparison

    Option Strengths Considerations Best For
    Standard Internal Pyramid (this item) Flush internal fit; clean sightlines; streamlined, subtle profile. Less decorative than external cap styles. Projects prioritizing a low-profile, integrated finish.
    Standard External Pyramid Cap Classic pyramid shape; easy slip-over installation; timeless look. :contentReference[oaicite:0]{index=0} Visible skirt around post top. Standard builds seeking familiar external cap detail.
    Standard New England Cap Decorative, stepped profile adds visual interest and architectural presence. :contentReference[oaicite:1]{index=1} More pronounced appearance than pyramid styles. Gate posts, corners, and focal locations where extra detail is desired.

    Choosing between internal and external post caps? Let us know your fence style, exposure conditions, and whether you want a flush or decorative finish—we’ll help you dial in the right cap for a clean, professional result.

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    5" x 5" Standard White Internal Post Cap - Detailed View
    Catalyst
    Catalyst 5" x 5" Standard Internal Post Cap

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