The only lightweight, warp-free, insulated honeycomb panel backed by a 50 year guarantee. 

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Utilized in various applications, SingCore has established itself as a premium core for custom pivot and sliding doors with our patented core material.


1-1 About

Find out more about Sing Core®, the inventor, why it is different, how we are better for the environment and what services we provide.

1-2 Photo Gallery

Take a visual tour of Sing Core® in its various forms and applications including client photos via our photo directory

1-3 Contents

Convenient directory listing to help you find what you’re looking for via our vast compendium of information.


Sing Sandwich cutaway exposing patented Sing Core

Simple Price/Order Process

Simple pricing length width thickness skin selection lightweight high strength engineered plywood

Ordering Sing Core products is as simple as specifying the length, width, thickness and desired skin material. See How Easy

Do It All with sing Sandwich Honeycomb Panel

Sing Sandwich is the premier torsion box core [wpex more=”Show more” less=”Show less”] that has the strength above almost any existing commonly used core. Manufacturing SingCore® uses less energy, no toxic chemicals or waste and is made in the USA. The heart and soul of Sing Panels is in our patented Sing Core® structure is the strongest, lightweight, renewable core used in the aerospace, composite, boat, home building, furniture many other endless industry, compare common used core such as aluminum, plastic core, foam core, Nomax, balsa wood, paper core and other composite core materials. [/wpex]

Sing Core non warping insulated large door lightweight stronger than steel 50 yr guarantee


Best Sellers: Sliding Door & Pivot Door


80% of Sing products sold are doors; of those, [wpex more=”Show more” less=”Show less”] 75% are large sliding doors. Whether you’re looking for a pocketed door system, wall-mounted system, hanging or floor track system, you can experience the superior performance of your Sing Core® Sliding Door. Barn doors (interior sliding doors) come in a variety of materials that are virtually unlimited to match your aesthetic tastes including, aluminum patio sliding doors. See also: Pivot Doors.[/wpex]
Large non warp exterior sliding doors guaranteed for 50 years lightweight high strength

How to Build Large Non-warping Doors

Large lightweight, high strength, true flat doors [wpex more=”Show more” less=”Show less”]are made with Premium Sing Panels, which incorporate the same lightweight high strength material as used across many industries with limitless Applications. Door panels in photo are used to create oversize sliding doors w/6mm marine grade plywood skin that weighs only 300 lbs. Specially designed to survive rigorous severe weather conditions, these large sliding doors will not warp, twist or crack and are guaranteed against structural failure for 50 years. These large lightweight panels with extraordinary strength can also be true flat and used for sliding doors, barn doors, carriage doors, moveable walls; if laid flat, can become table top, stage floor or mezzanine floor.[/wpex]

The best big door guaranteed large non warping doors

The biggest non-warping doors of any kind. Including sliding doors, pivot doors, French doors, flush doors. See The Best Big Doors

The only 50 year non warp guarantee for large doors of any size style types of doors

Proud to be helping door companies build the best non-warping doors of any size, even extremely large doors with 50 year guarantee for warp and structure. See More.


Top News @ Sing Core

Get the latest news on true flat non-warping doors, floors, walls, ceilings, wood, aerospace, tiny house, etc… Show more