Dock Edge Cone Head Piling Cap 12" PVC | DE91812F

Dock Edge Cone Head Piling Cap 12" PVC — Part #DE91812F

Protect and finish the top of your dock pilings with the Dock Edge DE91812F Cone Head Piling Cap. Made from marine-grade PVC, this cap slips over the top of a 12" diameter wood piling to shield it from rain, sun, and moisture intrusion — the leading causes of piling top rot and splintering. The cone-head profile sheds water cleanly and gives your dock a neat, finished look that lasts season after season.

Part Details

• Part Number: DE91812F (store SKU: 686-DE91812F)
• Brand: Dock Edge
• Product Type: Cone Head Piling Cap
• Material: Marine-grade PVC
• Piling Diameter: 12 in.
• Style: Cone head (flat cone profile, no fin)

Compatible Applications

• Round wood dock pilings with a 12" diameter at the top
• Fixed and floating dock piling installations
• Marina berth pilings, private dock pilings, and mooring pile structures
• Fitment note: Measure your piling diameter at the top before ordering. Dock Edge offers this cap in multiple sizes — see the Related Products section for other diameter options.

Dimensions

• Fits: 12" diameter pilings
• Profile: Cone head (tapered top for water shedding)
• Approximate weight: 2.1 lbs (953 g)

System

Dock piling protection — installed on the top of a wood dock piling to prevent weather-related deterioration at the most exposed point of the structure.

Installation Notes

• Inspect the top of the piling before installation — if the surface is uneven, cracked, or partially rotted, dress or trim the piling top flat for best cap fit
• The cap should sit firmly without rocking — if there is movement, the piling top may need dressing or a different cap size
• No adhesive is typically required, but marine-grade sealant can be applied around the rim in high-wave or high-wind environments for added retention

Service Interval

Inspect annually. Check for UV cracking, fading, or loosening. PVC caps in full sun exposure may become brittle over many seasons — replace when cracking is visible to maintain protection at the piling top.

Related Products — Other Piling Cap Sizes

• Dock Edge DE91802F — 10" Cone Head Piling Cap
• Dock Edge DE91811F — 11" Cone Head Piling Cap
• Dock Edge DE91822F — 12" Flat Style Piling Cap
• Dock Edge DE91882F — Larger Cone Head Piling Cap
• Dock Edge DE91892F — Cone Head Piling Cap
• Browse all Docking & Mooring Hardware

Technical FAQ

• How do I know which size cap I need? Measure the outer diameter of your piling at the very top. The DE91812F fits a 12" diameter piling. See our other Dock Edge sizes if your piling is smaller or larger.
• Will this work on a piling that is slightly tapered at the top? Yes — a small taper is normal for wood pilings. The cone-head design can accommodate minor variation. If the taper is severe, the cap may sit high or rock; dressing the top flat will give a better fit.
• Is marine-grade PVC UV-resistant? Yes — Dock Edge's marine-grade PVC is formulated for outdoor exposure. Expect good performance for multiple seasons, but inspect annually for UV-related brittleness in very sunny climates.
• Do I need to use screws or fasteners? Not typically. The cap relies on friction fit. In exposed locations with strong wave action or wind, a bead of marine sealant around the inside rim can improve retention.

Parts Desk Insights

Piling caps are one of those items customers often overlook until the top of a piling starts to check and split. The DE91812F is our go-to recommendation for 12" pilings — it's a simple, cost-effective way to extend the life of a piling significantly. The most common issue we see is customers ordering without measuring first. Wood pilings vary — a "12-inch piling" at the waterline may be 10" or 11" at the top after years of weathering. Always measure at the cap installation point before ordering. Also note: this is the cone-head (tapered top) version — Dock Edge also makes a flat-top cap in the same family, so confirm the profile you want before purchasing.