Plywood & Boards
BWP & Marine Plywood in Delhi
BWP (Boiling Water Proof) plywood is bonded with phenol-formaldehyde resin, so the layers stay together even after long exposure to water. Marine-grade sheets follow IS:710. It is the safest choice for sink cabinets, bathroom vanities and any furniture that will face regular moisture.
| Grade | BWP / Marine (IS:710) |
|---|---|
| Thickness | 6mm - 25mm |
| Sizes | 8x4 ft standard; ask for other sizes |
| Brands | Lee Perry, Goldberg |
Where to use BWP & Marine Plywood
- Kitchen sink and under-counter cabinets
- Bathroom vanities and wash-basin units
- Balcony and utility-area storage
- Furniture in damp or ground-floor rooms
How to choose
- Check the IS:710 or BWP stamp printed on the sheet face.
- Use 18mm or 19mm for cabinet carcass and 6mm to 9mm for back panels.
- Look for a full-core sheet (hardwood in every layer) where strength matters most.
- BWP costs more than BWR, so use it where water actually reaches and BWR elsewhere.
What makes BWP plywood different
All plywood is thin wood veneers glued in layers. What separates MR, BWR and BWP is the glue. BWP (boiling water proof) plywood is bonded with phenol-formaldehyde resin, which keeps the layers locked together even after long contact with water. MR plywood, by contrast, uses a glue meant only for dry rooms and can delaminate (layers coming apart) once water gets in.
There are two kinds of BWP sheet in the market:
| IS 710 (marine) | IS 303 BWP | |
|---|---|---|
| Meant for | Constant wet conditions; originally boats | Humid and splash-prone interiors |
| Rules | Stricter: core gaps, veneer quality, bonding | General purpose plywood with BWP glue |
| Typical home use | Sink cabinets, bathroom vanities, balcony units | Kitchens, damp walls |
IS 303 gained an interior BWP grade in a 2024 amendment. Both are genuine BWP; the marine sheet is built to a stricter standard and is priced accordingly. Read the stamp before you pay the marine rate: the stamp checker explains what each marking means.
Where BWP is worth the extra cost
BWP is the right sheet wherever water reaches the board regularly:
- The kitchen sink cabinet. Leaks from the waste pipe and wet utensils stacked on the shelf are daily events.
- Bathroom vanities and wash-basin units.
- Balcony and utility-area storage that sees rain or a washing machine.
- Furniture on the ground floor against a damp wall, common in older houses in North and outer Delhi.
For the rest of the kitchen, a wardrobe or a TV unit, BWR plywood does the job at a lower cost. For places where water stands for hours, WPC board doesn't absorb water at all and is worth comparing.
Thickness guide for BWP plywood
| Part | Thickness |
|---|---|
| Sink cabinet carcass, vanity body | 18mm or 19mm |
| Shelves inside the sink cabinet | 18mm (they carry wet, heavy items) |
| Back panels | 6mm to 9mm |
| Shutters | 18mm, with laminate on both faces |
What to check before you buy
- The stamp: ISI mark, CM/L licence number, IS 710 or IS 303, and BWP clearly printed. Verify the CM/L number in the BIS Care app.
- The edge: look for an even, gap-free core. Overlaps and hollows inside the edge weaken screw holding and let water travel.
- The face: smooth, without patches or cracks, if you want a neat laminate finish.
- The bill: a GST bill with brand, grade and thickness, which you need for any warranty claim.
Common mistakes
- Using BWP with ordinary glue. Pair waterproof plywood with a waterproof adhesive such as Fevicol Marine; see Fevicol and adhesives.
- Leaving edges open. The glue is waterproof but the edge grain of the wood still drinks water. Seal every edge with edge band tape.
- Laminate on one side only. Unbalanced shutters bend; use laminate outside and liner inside.
More detail in the waterproof plywood guide and the modular kitchen plywood guide.
BWP plywood at Nitin Plywood House, Alipur
We deal in BWP and marine plywood from Lee Perry and Goldberg in 6mm to 25mm, mostly in 8x4 ft sheets. Stock changes often: to check a brand or thickness and get today's rate, call +91-9212017608. We deliver all over Delhi from Alipur.
Brands we deal in
- Lee Perry
- Goldberg
Stock changes often. To check if a brand, grade or size is available today, call Nitin Plywood House, Alipur on +91-9212017608.
Frequently asked questions
Is BWP plywood the same as marine plywood?
Marine plywood is BWP plywood made to the stricter IS:710 standard, with better veneers and tighter core gaps. All marine plywood is BWP, but not every BWP sheet is marine grade.
Which thickness of BWP plywood is best for a kitchen?
18mm or 19mm for the cabinet box and shelves, and 6mm to 9mm for back panels. Under the sink, use BWP for every part of the cabinet.
Is BWP plywood 100% waterproof?
The glue in BWP plywood is boiling water proof, so the layers don't separate when wet. The wood itself can still absorb water at open edges and swell or rot over time, so seal every edge with edge band and use WPC board where water stands constantly.
Do I need BWP plywood for the whole kitchen?
Not usually. BWP is needed for the sink cabinet and anything that gets wet daily. The rest of the kitchen does well in BWR plywood, which costs less.