Beautiful Large Panel Fiberglass Edge

Sing Core makes revolutionary fiberglass (FRP) doors that supersede all other fiberglass doors while being lightweight, stronger than steel, and eco-friendly. Sing Core Fiberglass FRP Doors reduce strain on the hardware and surrounding structure, which minimizes maintenance costs over time.

Sing Core doors are available in any size or shape, according to your specifications. Our patented Sing Core technology makes Sing Core ideal for large oversize doors.

Sing Fiberglass FRP Doors

Click the picture to see our fiberglass (FRP) door gallery!

Sing Core works hand-in-hand with architects, designers, contractors, and end users to create FRP (fiberglass reinforced plastic) doors that help to solve the structural challenges that are often associated with fiberglass work. At the same time, our Sing Core doors maintain the highest levels of structural integrity and minimize the cost of construction and maintenance.

Our fiberglass doors also offer superb sound deadening qualities and outperforms foam offers a 3.5 R factor per sq inch of thickness.

Sing FRP Fiberglass Doors have long-term benefits when compared to traditional wood and metal doors. Sing FRP Fiberglass Doors are more resistant to surface scratches, peeling, or warping. Additionally, they serve as an excellent severe weather repellent material.

Large Production Capacity:

When you order from Sing Core, you can rest assured your order will be completed in a timely manner.   We have the production capacity for any order, large or small.

FRP Fiberglass Hinge Doors Huge Stack

Other benefits include:

  • Outperform and longer lasting than vinyl doors
  • Available in a variety of colors and finishes
  • Much lower maintenance in comparison to other materials
  • Available in faux wood finish
  • Sing Fiberglass FRP Doors are at least five times more insulation than wood.

Our unique Sing Honeycomb Core  is what makes our products so different from other honeycomb manufacturers because our core isn’t just foam; our core is our vertical grain grid system and recycled EPS foam merged together to make a product that is 1/3 lighter than standard plywood products of a similar size and thickness.

The only 50 year warp-free guarantee and full structure warranty

Our Fiberglass FRP Doors are not only extremely lightweight, but stronger than steel pound for pound and can be guaranteed to be truly flat.

Applications include:

  • Aircraft doors
  • Commercial bathroom doors
  • Display doors
  • frp-fiberglass-sing-panelEquipment enclosures
  • Extreme weather doors
  • Marine doors
  • Pivot doors
  • Roof hatch doors
  • Sauna doors
  • Water tank access doors
  • Weatherproof doors

For more information see Sing FRP & Plastic and other Sing Core Doors. See also: FRP Specs (Glasliner)



Other Sing Core solutions can be found as other building materials.

How to Buy

To order Sing Fiberglass FRP Doors submit an order form either by email, , or print and fax it to: 360.495.4585. We’ll provide a quote within 48 hours. If you have questions, please contact us.

Easy Ordering

All we need to know is the length, width, thickness and what you desire on the exterior, and your custom specialty panels are made to order. Getting a quote for your specialty product, is easy, thanks to our simple online order system.

Bulk Discounts

If you’re looking for a bargain price, remember, the more you order, the less expensive your total order will be per piece. Quantity and wholesale inquiries are encouraged. Feel free to contact us for more information. Click here for Closeout specials.

Fast turnaround: In you’re in a rush, only Sing Core can be custom made within 48 hours and is proudly manufactured for you in the USA.

Fast delivery: Any thickness and almost any length, less than 5 ft wide, can be made with in 48 hours if it is rush order.

SINGCORE Fiberglass FRP Doors are easy to order. You may choose from our stock panels or order custom sized panels. Our price is based on the length, width, thickness, and quantity. If you have a tight budget, give us a call, we might have an alternative solution tailored to your needs.