Plywood in India is graded based on water resistance. MR (Moisture Resistant) or Commercial grade plywood is suitable for dry spaces like bedrooms, ceilings, and wardrobes. BWR (Boiling Water Resistant) is ideal for semi-damp spaces like dining wash basins. BWP (Boiling Water Proof) or Marine plywood is the highest grade, bonded with phenol formaldehyde resin, designed to withstand direct contact with water for days. It is mandatory for kitchen cabinetry, bathroom vanities, and exterior applications. Understanding these grades will save you from using the wrong materials and experiencing premature wood rot.