The numbers stamped on a sheet aren't marketing — they're Bureau of Indian Standards (BIS) specifications. Knowing IS:710 from IS:303 is your best defence against paying marine prices for moisture-resistant board.
The two standards that matter
| Standard | Covers | Meaning |
|---|---|---|
| IS:303 | MR & BWR | General-purpose & boiling-water-resistant grades for interior/dry use |
| IS:710 | Marine / BWP | Boiling-water-proof grade for continuous-moisture & exterior use |
IS:710 is the higher, stricter standard — a more demanding boiling-water test, which is why genuine marine ply costs more.
Verify a genuine board
Look for the BIS/ISI mark with the correct IS number, a consistent brand name, batch markings and a written warranty. Ask the dealer to show the certification.
IS:303 = MR/BWR (interior & dry). IS:710 = marine/BWP (wet & exterior). Match the standard to where the board will live.
Every Gattani board is made to deliver consistent, certified performance — see our plywood range or read the BWP vs BWR guide.
Need the right board for your project?
Talk to Gattani Plywood — premium plywood, WPC, doors, shuttering ply & laminates, with dealers across India.
Get a quote / find a dealerFrequently asked questions
What is the difference between IS:710 and IS:303?
IS:710 covers marine/BWP for wet and exterior use; IS:303 covers MR and BWR for interior/dry use. IS:710 is stricter.
Is the ISI mark important for plywood?
Yes — it's your proof the board meets the claimed grade, essential in a largely unbranded market.
Which standard for outdoor plywood?
IS:710 (marine/BWP) — tested to withstand continuous moisture.