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Keystones

Architectural Fypon Keystones

Combine these weatherproof PVC keystones with our door and window trim for a more complex look.

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Build a layered architectural style on Fypon door and window trim with paintable, maintenance-free keystone elements.

Our eleven main designs are made from high-density polyurethane and will never rot, warp, or swell.

  • Upgrade existing windows quickly and easily.
  • Outlasts all comparable wooden architectural elements in the field.
  • Integrates with all Fypon door and window crossheads.
 

Custom designs and dimensions available are available. Contact us to learn more.

If you need a custom architectural keystone, contact us for more information.
Contact Us

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Learn More About PVC Keystones

Frequently Asked Questions

    • What door and window trim options do these keystones work with?
      These keystones are designed to work with all Fypon door and window crossheads.

Don’t See Your Question? Drop us a line and we’ll help you sort it out.
Contact Us

  • Keystone for Trim Profiles Part Number KWM180M Keystone for Trim Profiles Part Number KWM180M

    Keystone for Trim Profiles Part Number KWM180M

    Keystones for Trim Profile - KWM180MNote: Compatible with the following Arches & Trim: Brick Mould Louvers/Trim and MLDWM180.Manufactured by FyponMaterial: PolyurethaneColor: White (Looks as pictured) Ready for stain or paint.Shipping Details

    $20.28 $12.58
    Add to Cart
  • Keystone for Trim Profiles Part Number K4TF Keystone for Trim Profiles Part Number K4TF

    Keystone for Trim Profiles Part Number K4TF

    Keystones for Trim Profile - K4TFNote: Compatible with the following Arches & Trim: 4F Arches and FLT152.Manufactured by FyponMaterial: PolyurethaneColor: White (Looks as pictured) Ready for stain or paint.Shipping Details

    $24.35 $15.10
    Add to Cart
  • Keystone for Trim Profiles Part Number K4TM Keystone for Trim Profiles Part Number K4TM

    Keystone for Trim Profiles Part Number K4TM

    Keystones for Trim Profile - K4TMNote: Compatible with the following Arches & Trim: 4M Arches and MLD215.Manufactured by FyponMaterial: PolyurethaneColor: White (Looks as pictured) Ready for stain or paint.Shipping Details

    $24.35 $15.10
    Add to Cart
  • Keystone for Trim Profiles Part Number KP4TF Keystone for Trim Profiles Part Number KP4TF

    Keystone for Trim Profiles Part Number KP4TF

    Keystones for Trim Profile - KP4TFNote: Compatible with the following Arches & Trim: 4F Arches and FLT152.Manufactured by FyponMaterial: PolyurethaneColor: White (Looks as pictured) Ready for stain or paint.Shipping Details

    $24.35 $15.10
    Add to Cart
  • Keystone for Trim Profiles Part Number KP4TM Keystone for Trim Profiles Part Number KP4TM

    Keystone for Trim Profiles Part Number KP4TM

    Keystones for Trim Profile - KP4TMNote: Compatible with the following Arches & Trim: 4M Arch Trim and MLD215.Manufactured by FyponMaterial: PolyurethaneColor: White (Looks as pictured) Ready for stain or paint.Shipping Details

    $24.35 $15.10
    Add to Cart
  • Keystone for Trim Profiles Part Number K6 Keystone for Trim Profiles Part Number K6

    Keystone for Trim Profiles Part Number K6

    Keystones for Trim Profile - K6Note: This keystone is not moulded on back side.Manufactured by FyponMaterial: PolyurethaneColor: White (Looks as pictured) Ready for stain or paint.Shipping Details

    $31.15 $19.31
    Add to Cart
  • Keystone for Trim Profiles Part Number K6M Keystone for Trim Profiles Part Number K6M

    Keystone for Trim Profiles Part Number K6M

    Keystones for Trim Profile - K6MNote: Compatible with the following Arches: 6" WCH, 6" WCH w/ BT, 6" CH and 6" CH w/ BT.Manufactured by FyponMaterial: PolyurethaneColor: White (Looks as pictured) Ready for stain or paint.Shipping Details

    $31.15 $19.31
    Add to Cart
  • Keystone for Trim Profiles Part Number K6TF Keystone for Trim Profiles Part Number K6TF

    Keystone for Trim Profiles Part Number K6TF

    Keystones for Trim Profile - K6TFNote: Compatible with the following Arches & Trim: 6F Arches and FLT159.Manufactured by FyponMaterial: PolyurethaneColor: White (Looks as pictured) Ready for stain or paint.Shipping Details

    $31.15 $19.31
    Add to Cart
  • Keystone for Trim Profiles Part Number K6TM Keystone for Trim Profiles Part Number K6TM

    Keystone for Trim Profiles Part Number K6TM

    Keystones for Trim Profile - K6TMNote: Compatible with the following Arches & Trim: 6M Arches, MLD220 and DWH221.Manufactured by FyponMaterial: PolyurethaneColor: White (Looks as pictured) Ready for stain or paint.Shipping Details

    $31.15 $19.31
    Add to Cart
  • Keystone for Trim Profiles Part Number KP6M Keystone for Trim Profiles Part Number KP6M

    Keystone for Trim Profiles Part Number KP6M

    Keystones for Trim Profile - KP6MNote: Compatible with the following Arches: 6" WCH, 6" WCH w/ BT, 6" CH and 6" CH w/ BT.Manufactured by FyponMaterial: PolyurethaneColor: White (Looks as pictured) Ready for stain or paint.Shipping Details

    $31.15 $19.31
    Add to Cart
  • Keystone for Trim Profiles Part Number KP6TF Keystone for Trim Profiles Part Number KP6TF

    Keystone for Trim Profiles Part Number KP6TF

    Keystones for Trim Profile - KP6TFNote: Compatible with the following Arches & Trim: 6F Arches and FLT159.Manufactured by FyponMaterial: PolyurethaneColor: White (Looks as pictured) Ready for stain or paint.Shipping Details

    $31.15 $19.31
    Add to Cart
  • Keystone for Trim Profiles Part Number KP6TM Keystone for Trim Profiles Part Number KP6TM

    Keystone for Trim Profiles Part Number KP6TM

    Keystones for Trim Profile - KP6TMNote: Compatible with the following Arches & Trim: 6M Arch Trim, MLD220 and DWH221.Manufactured by FyponMaterial: PolyurethaneColor: White (Looks as pictured) Ready for stain or paint.Shipping Details

    $31.15 $19.31
    Add to Cart
  • Keystone for Trim Profiles Part Number K8 Keystone for Trim Profiles Part Number K8

    Keystone for Trim Profiles Part Number K8

    Keystones for Trim Profile - K8Note: This keystone is not moulded on back side.Manufactured by FyponMaterial: PolyurethaneColor: White (Looks as pictured) Ready for stain or paint.Shipping Details

    $40.64 $25.20
    Add to Cart
  • KEY11 KEY11

    KEY11

    GD667-8-96 Gable pediment decoration in woodgrain finish. What is my roof pitch?Gable Decoration General Information

    $34.27 $25.70
    Add to Cart
  • Keystone for Trim Profiles Part Number K10TM Keystone for Trim Profiles Part Number K10TM

    Keystone for Trim Profiles Part Number K10TM

    Keystones for Trim Profile - K10TMNote: Compatible with the following Arches & Trim: 10M Arch Trim, PIL10X96A and PIL10X192A.Manufactured by FyponMaterial: PolyurethaneColor: White (Looks as pictured) Ready for stain or paint.Shipping Details

    $44.72 $27.72
    Add to Cart
  • Keystone for Trim Profiles Part Number K9M Keystone for Trim Profiles Part Number K9M

    Keystone for Trim Profiles Part Number K9M

    Keystones for Trim Profile - K9MNote: Compatible with the following Arches: 9" WCH, 9" WCH w/ BT, 9" CH and 9" CH w/ BT.Manufactured by FyponMaterial: PolyurethaneColor: White (Looks as pictured) Ready for stain or paint.Shipping Details

    $44.72 $27.72
    Add to Cart
  • Keystone for Trim Profiles Part Number KP9M Keystone for Trim Profiles Part Number KP9M

    Keystone for Trim Profiles Part Number KP9M

    Keystones for Trim Profile - KP9MNote: Compatible with the following Arches: 9" WCH, 9" WCH w/ BT, 9" CH and 9" CH w/ BT.Manufactured by FyponMaterial: PolyurethaneColor: White (Looks as pictured) Ready for stain or paint.Shipping Details

    $44.72 $27.72
    Add to Cart
  • KEY12 KEY12

    KEY12

    GD667-9-66 Gable pediment decoration in woodgrain finish. What is my roof pitch?Gable Decoration General Information

    $38.34 $28.76
    Add to Cart
  • KEY06 KEY06

    KEY06

    GD667-8-84 Gable pediment decoration in woodgrain finish. What is my roof pitch?Gable Decoration General Information

    $40.20 $30.15
    Add to Cart
  • KEY14 KEY14

    KEY14

    GD667-9-84 Gable pediment decoration in woodgrain finish. What is my roof pitch?Gable Decoration General Information

    $41.56 $31.17
    Add to Cart
  • KEY09 KEY09

    KEY09

    GD667-8-72 Gable pediment decoration in woodgrain finish. What is my roof pitch?Gable Decoration General Information

    $48.24 $36.18
    Add to Cart
  • KEY15 KEY15

    KEY15

    GD667-9-96 Gable pediment decoration in woodgrain finish. What is my roof pitch?Gable Decoration General Information

    $49.93 $37.45
    Add to Cart
  • KEY18 KEY18

    KEY18

    Gable Pediments Flat Style Manufactured by Fypon Material: Polyurethane Color: White (Looks as pictured) Ready for stain or paint. Category: Decorative Millwork, Gable Vents Shipping Details What is my roof pitch?Gable Decoration General Information

    $60.63 $45.47
    Add to Cart
  • KEY16 KEY16

    KEY16

    Gable Pediments Victorian Style Manufactured by Fypon Material: Polyurethane Color: White (Looks as pictured) Ready for stain or paint. Category: Decorative Millwork, Gable Vents Shipping Details What is my roof pitch?Gable Decoration General Information

    $62.09 $46.57
    Add to Cart
  • KEY20 KEY20

    KEY20

    Gable Pediment Kits Basic System Manufactured by Fypon Note: Ships in 6 pieces; field trimming and assembly required. Installation hardware and instructions included. Material: Polyurethane Color: White (Looks as pictured) Ready for stain or paint...

    $63.84 $47.88
    Add to Cart
  • KEY19 KEY19

    KEY19

    Gable Pediment Kits Stewart System Manufactured by Fypon Note: GPK401 and GPK801 kits include adhesive and screws. Material: Polyurethane Color: White (Looks as pictured) Ready for stain or paint. Category: Decorative Millwork, Gable Vents Shipping...

    $91.12 $68.34
    Add to Cart