Solidium MR And Bathroom Cabinets

Keep Stability From Going Down The Drain

Solidium RTA components


From simple shapes to fine details, increase productivity and part consistency with Solidium MDF ... more

You can’t control your application environment, but you can choose a product that works as hard as you do to protect the end result. Solidium MR from Del-Tin Fiber is an interior, moisture-resistant panel engineered to deliver the machinability you expect from MDF – plus improved dimensional stability and reduced thickness swell when exposed to wetness. Formulated for use in a variety of applications where moisture or high humidity is a real concern, Solidium MR is ideal for sink bases and cabinetry, dishwasher enclosures, and other residential uses. It’s also well-suited for table tops, cabinets and fixtures in schools, healthcare and industrial facilities, offering added protection against unwanted moisture penetration. Solidium MR helps ensure a little moisture won’t put a damper on all of your hard work.

Physical Properties

Usage: Interior use only Thicknesses: 3/16" - 1"
Raw Material: Southern Pine fiber Widths: To five feet
Lengths: To sixteen feet
Minimum Panel Averages <3/8" >3/8" to <1/2" 1/2" to 3/4" >3/4"
IB - Internal Bond (psi) 110 100 90 85
MOR - Modulus of Rupture (psi) 4,050 4,050 4,050 4,050
MOE - Modulus of Elasticity (ppsi) 405 405 405 405
Face Screw Hold (lbs) NA NA 270 270
Edge Screw Hold (lbs) NA NA 250 250
Thickness Swell (max) .044" 10% 7% 4%
Length & Width: (for each panel) ± 1/16"
Squareness: (per 1 ft. of length) ± 1/64"
Straightness: (per 2 ft. of length) ± 1/64"
Thickness: (within panel) ± 0.005"
Thickness: (panel to panel) ± 0.005"



The Composite Panel Association (CPA) has certified the El Dorado, Arkansas, manufacturing facility of Del-Tin Fiber, LLC to be in compliance with the requirements of CPA ECC 4-11 for Eco-Certified Composites and the California Air Resources Board (CARB) Airborne Toxic Control Measure 93120.

Solidium MR exceeds the standards for CARB Phase 2 compliance.


In addition, the Composite Panel Association has certified that Del-Tin Fiber, LLC has fulfilled the requirements of CPA ECC 4-11 for Eco-Certified Composites by demonstrating compliance to these four environmental criteria.

  1. Carbon Footprint – requires each panel to demonstrate net carbon storage
  2. Local and Renewable Resource – requires high percentage use of local fiber
  3. Recycled/Recovered – requires high percentage use of recycled/recovered fiber
  4. Sustainability – requires low percentage of fiber furnish to enter waste stream

Review greater detail of the ECC standard and a link to the Del-Tin Fiber, LLC certificate on our ECC certification page.


Solidium MR can also contribute toward credits in popular environmental certification programs such as LEED, Green Globes, NAHB and CARB. Visit our green contributions page for more information.

manufacturer of Solidium MDF