SKU: 84396485625

MDF Radius Corners, 4 Econo Qtr Rnd (accepts 5/8" plywood), 4" Radius, 5 11/16"W x 1 5/8"D x 97"L

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Description

MDF Radius Corners, 4 Econo Qtr Rnd (accepts 5/8" plywood), 4" Radius, 5 11/16"W x 1 5/8"D x 97"LWhite River Hardwoods MDF Radius Corners Made in the USA 4 Econo Quarter Round SKU 4ECQ58 Accepts 5 8 Plywood 4 Radius 97 Length Double Refined MDF 5 11 16W 1 5 8D Ships LTL Where bent plywood fails and kerf cut corners fall short, the 4ECQ58 delivers a true 4 radius in Double Refined MDF consistent, paintable, and manufactured to spec every time. Accepts 5 8 plywood box construction. Made in Fayetteville, AR The Only National MDF Radius Corner

White River Hardwoods · MDF Radius Corners · Made in the USA

4″ Econo Quarter Round

SKU 4ECQ58 · Accepts 5/8″ Plywood · 4″ Radius · 97″ Length

Double Refined MDF · 5 11/16″W × 1 5/8″D · Ships LTL


Where bent plywood fails and kerf-cut corners fall short, the 4ECQ58 delivers a true 4″ radius in Double Refined MDF — consistent, paintable, and manufactured to spec every time. Accepts 5/8″ plywood box construction.

Made in Fayetteville, AR · The Only National MDF Radius Corner Manufacturer in the USA

Where bent plywood gaps and kerf-cut corners crack, the 4ECQ58 holds its radius cleanly — Double Refined MDF, milled to spec, every piece the same.

Product Details

Dimensions & Specifications

SKU Profile Radius Accepts Width Depth Length
4ECQ58 Econo Quarter Round 4″ Radius 5/8″ plywood 5 11/16″ 1 5/8″ 97″

* Material: Double Refined MDF. Lead time: 7–10 business days. Ships LTL — minimum $45 freight. Street address required for delivery.

Why MDF Radius Corners

The Problem This Solves

⌒

Econo Quarter Round — 4″ Radius

The Econo Quarter Round profile provides a clean radius transition at cabinet and furniture corners. The quarter round geometry wraps the corner fully — no exposed substrate, no raw edge, no gap.

▣

Double Refined MDF

Double Refined MDF machines cleanly, paints to a flawless finish, and holds its shape over time. No grain inconsistency, no void risk — just a consistent, dense substrate that takes primer and paint the way cabinetry demands. A surface indistinguishable from solid wood when properly primed and painted.

★

Only National Manufacturer

White River Hardwoods is the only national manufacturer of MDF radius corners in the USA — made in Fayetteville, AR. Consistent quality, reliable availability, and a supplier that has been delivering to the cabinetry industry nationally for decades.

⊞

Accepts 5/8″ Plywood

Engineered specifically for 5/8″ plywood box construction — the standard substrate for this profile. The plywood box butts cleanly into the radius corner without shimming, scribing, or custom fitting. One piece, right the first time.

Technical Specifications

Key Facts

Profile

Econo Quarter Round

Radius

4″

Accepts

5/8″ Plywood

Width

5 11/16″

Depth

1 5/8″

Length

97″

Material

Double Refined MDF

Lead Time

7–10 Business Days

Made In

Fayetteville, AR

Installation

Working With Radius Corners

1

Plan Your Layout

Determine the location and orientation of each radius corner. The piece is 97″ long — cut to your finished height. Mark cut lines accurately before cutting; MDF does not forgive mis-cuts at visible faces.

2

Cut to Height

Cut with a fine-tooth carbide blade — MDF dulls blades quickly. Cut from the finish face to minimize tear-out. Support the full length when cutting to prevent binding and chipping at the cut line.

3

Dry Fit First

The 5/8″ plywood box should seat cleanly into the radius channel. Dry fit before applying any fasteners or adhesive — confirm seating depth and check that the radius face is flush with adjacent cabinet faces.

4

Fasten & Secure

Secure with construction adhesive and finish nails or screws through the cabinet box. Pre-drill to avoid splitting. Set fasteners slightly below the surface — MDF fills cleanly and holds fasteners well when properly pre-drilled.

5

Fill & Prime

Fill all nail holes and seams with lightweight filler. Sand flush when dry. Apply a quality MDF primer before finish coats — MDF is highly absorbent and requires a sealing primer coat for a smooth, paint-ready surface.

6

Finish to Match

Apply your chosen paint in thin, even coats over the primed surface. Two finish coats over primer is standard for a smooth painted cabinet finish. Sand lightly between coats with 220-grit.

Always Prime MDF Before Finishing

MDF is highly absorbent at cut edges and faces. A quality MDF-specific or high-build primer is essential before any finish coat. A properly primed MDF radius corner paints to a finish indistinguishable from solid wood — skipping the primer step results in an uneven surface that requires significant additional work to correct.

Shipping — LTL Freight

MDF Radius Corners ship via LTL freight. Freight is calculated by destination with a minimum charge of $45. If actual freight exceeds $45, a separate freight invoice will be emailed after your order is placed.

Important: LTL delivery requires a physical street address. We are unable to deliver to APO/FPO addresses or PO Boxes. Estimated lead time is 7–10 business days from order confirmation, subject to inventory availability.

4ECQ58 — 4″ Econo Quarter Round Radius Corner. The one the cabinetry industry keeps coming back to.


Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 84396485625

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4.7 ★★★★★
Based on 16 reviews
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Product Reviews
J
Verified Purchase
John Degen
Louisville, US
★★★★★ 5
Smells amazingly like cherry, but expect a mess under the feeder.
Style: Wild Bird Food, Style: Wild Bird Food
This is a fantastic budget seed blend to keep your backyard feeders full during the busy seasons. I put a banana in the picture next to this massive 10-pound bag for scale, though I wouldn't recommend leaving the fruit out there unless you want to feed the local raccoons instead. The most surprising part of this bag is the smell—it has a very strong, sweet cherry scent right out of the bag that genuinely seems to bring in the local cardinals and blue jays faster than plain seed. THE GOOD: • The cherry flavoring actually works as an attractant, and the sheer volume of seed you get for the price makes this an excellent value for high-traffic yards. • It brings in a huge variety of ground-feeding birds, especially mourning doves and juncos. THE TRADE-OFF: • This is a "value" mix, which means it contains a very high percentage of filler seeds like milo and cracked corn. Finicky songbirds will actively kick the milo out of the hanging feeder to get to the black oil sunflower seeds, creating a massive pile of rejected seed on the ground. THE BOTTOM LINE: A great-smelling, budget-friendly birdseed that attracts a ton of wildlife, provided you don't mind the ground-feeders cleaning up the mess underneath.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 30, 2026
A
Verified Purchase
Amazon Customer
San Leandro, US
★★★★★ 5
Has attracted a mix of birds.
Style: Wild Bird Food
Great value for the price. Since putting this out, we’ve had so many different kinds of birds visiting our yard. The birds seem to love the mix, and it has definitely brought more activity to our feeders. I also compared prices before purchasing, and this was very comparable to similar products and bag sizes. Overall, it’s a quality bird seed at a fair price, and I would absolutely buy it again
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 20, 2026
A
Verified Purchase
Angela Felan
Natrona Heights, US
★★★★★ 5
Great for local birds
Style: Wild Bird Food
This bird seed has been a great find for attracting birds here in North Texas! Within just a couple of days of putting it out, we started seeing a noticeable increase in activity. It brings in a nice variety too—cardinals, finches, doves, and even the occasional blue jay. The mix seems fresh and well-balanced, with very little waste. I also appreciate that it doesn’t have a ton of filler seeds that birds usually ignore. Everything in the blend actually gets eaten, which makes it feel like a better value. It holds up well in our unpredictable Texas weather, and I haven’t had issues with mold or clumping. Overall, if you’re looking to attract a wide range of local birds and keep your feeder busy, this is definitely worth trying!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 28, 2026
C
Verified Purchase
Cat
Pawtucket, US
★★★★★ 5
Great Bird Attraction & Solid Value for the Price
Style: Wild Bird Food
This bird seed has been a great addition to our yard. It attracts a wide variety of birds + they seem to really enjoy the cherry flavor.. it doesn’t sit untouched like some other mixes I’ve tried. The quality is solid, with a good mix that looks fresh and not overly dusty. It also seems easy for the birds to digest, as they keep coming back + there’s minimal waste left behind. I mean.. enjoying the bird without the poop - WIN! The 10-pound bag is a great size.. enough to last a while without constantly needing to restock. For the quantity you get, it’s definitely good value for the money. Overall, a reliable choice if you’re looking to attract more birds without overspending. If your debating.. BUY NOW
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 2, 2026
B
Verified Purchase
buttercup
Port Orchard, US
★★★★★ 4
Good price
Style: Wild Bird Food
Birds love most of this, but the small filler they just leave this behind.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 30, 2026

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