Plywood Fundamentals · MR Grade
What Is MR Plywood?
MR (moisture-resistant) plywood, certified to IS 303, is the most widely used grade for indoor furniture in India — built for everyday humidity, not sustained water contact.
What Makes a Sheet "MR Grade"
The Adhesive
MR plywood uses urea-formaldehyde resin — effective against everyday ambient humidity but not built for sustained water contact.
The Standard
Genuine MR-grade plywood in India is certified to IS 303 — always check for this mark rather than trusting the label alone.
Termite & Borer Resistance
Quality MR plywood is typically treated during manufacturing to resist termite and borer attack, extending its usable life indoors.
Thickness Range
Available across the standard ladder — 6, 9, 12, 16, 19 and 25mm — to match everything from panelling to structural furniture.
Where Not to Use MR Plywood
Avoid MR grade in kitchens, bathrooms, and anywhere facing splashing or sustained moisture — the urea-formaldehyde bond will delaminate over time under conditions that BWP grade is specifically built to handle. See our MR vs BWR vs BWP grade guide for the full comparison.
Why It's the Default Choice for Interior Furniture
For bedrooms, living rooms and general storage furniture, MR plywood delivers strong structural performance, good workability for carpentry, and stable dimensions across normal humidity swings — all at a lower cost than BWR or BWP grade. That combination makes it the sensible default wherever sustained moisture isn't a real concern.
Frequently Asked Questions
Where should MR plywood be used?
MR plywood suits dry interior applications — bedroom furniture, living room units, wardrobes and general carpentry where only ambient humidity, not sustained water contact, is a factor.
Is MR plywood waterproof?
No — it's moisture-resistant only, meaning it handles everyday humidity but will delaminate under sustained water exposure; BWP grade is needed for that level of protection.
What thicknesses does MR plywood come in?
The standard range is 6, 9, 12, 16, 19 and 25mm, the same ladder used across most plywood grades, chosen based on the specific application.
Can MR plywood be used in a kitchen?
It's not recommended — kitchens face regular splashing and steam that exceed what MR grade is built to handle; BWP or marine grade is the better choice there.
How long does MR plywood typically last indoors?
In a dry, well-ventilated indoor setting with normal use, MR plywood furniture commonly lasts well over a decade — its lifespan is significantly shorter in humid or wet conditions it isn't designed for.
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