Understanding BWR, BWP, and ISI:710 - What You Need to Know

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