Choosing the right plywood starts with understanding the grades that define its durability, waterproofing, and compliance. Let’s break down the key terms: BWR, BWP, and ISI:710.
1. What is BWR Plywood?
BWR = Boiling Water Resistant
This grade is designed to withstand moderate moisture exposure, making it ideal for:
- Kitchens (dry areas)
- Bathrooms (cabinetry, false ceilings)
- Semi-damp locations
- Furniture in humid climates
Core Features:
- Bonded with Melamine Urea Formaldehyde (MUF) resin
- Can resist boiling water for about 8 hours
- Termite and borer resistant (varies by brand)
- Generally certified under ISI:303
- Think of BWR as water-tolerant, not fully waterproof.
2. What is BWP Plywood?
BWP = Boiling Water Proof
Often referred to as Marine Grade Plywood, BWP is designed for long-term water immersion, making it the strongest and most waterproof grade in the market.
Core Features:
- Bonded with Phenol Formaldehyde (PF) Resin
- Can withstand 72+ hours of boiling water without delaminating
- Ideal for:
- Kitchens & bathrooms
- Water tanks, boats, terraces
- Coastal homes, basements, and other wet areas
- BWP is suitable where water exposure is constant, aggressive, or long-term.
3. What is ISI:710?
ISI:710 is the Indian Standards Institute certification specifically for BWP-grade plywood.
It’s the gold standard for waterproof plywood in India.
What It Certifies:
- Plywood has passed 72-hour boiling water tests
- Long-term resistance to moisture, delamination, and fungal attack
- Use of Phenol Formaldehyde resin
- Stringent quality checks during manufacture
- Long durability and load-bearing strength
- Any BWP plywood must have ISI:710 certification to be considered genuine.
BWR vs BWP vs ISI:710 – Quick Comparison
| Feature | BWR | BWP | ISI:710 |
|---|---|---|---|
| Full Form | Boiling Water Resistant | Boiling Water Proof | ISI Standard for BWP |
| Glue Used | MUF | PF Resin | PF Resin |
| Water Resistance | Moderate (up to 8 hours) | Excellent (72+ hrs) | Tested & Verified |
| Best Used For | Dry kitchens, wardrobes | Wet kitchens, bathrooms, outdoors | Any critical water-prone areas |
| ISI Grade | ISI:303 | ISI:710 | ISI:710 |
| Price | Lower | Higher | Varies by Brand |
Why It Matters for You
- For homeowners: Ensures you don’t face peeling, swelling, or fungal damage in the future.
- For builders & designers: Reduces maintenance costs and call-backs.
- For contractors: Guarantees product performance under tough site conditions.
