— High-Density Concrete Shuttering Panels for Maximum Repetition and Heavy Infrastructure
The strength of your formwork will determine the speed of construction and the quality of the concrete finish in large-scale civil engineering and real estate projects. WonderPly Shuttering Plywood Wonderlam Industries WonderPly Shuttering Plywood is a high-quality, premium-grade, high-density film-faced construction plywood capable of withstanding extreme concrete pour pressures, rough site handling and repeated cycles without degradation of structure.
Our shuttering panels are manufactured strictly as per IS 4990: 1993 guidelines. Double-sided phenol-impregnated film overlays (120 GSM) bonded under high temperature and pressure with 100% Boiling Water Proof (BWP) Phenol Formaldehyde (PF) resin. This results in a totally hydrophobic glass-smooth surface that inhibits moisture absorption and provides mirror-finish concrete release.
— Key Features
Benefits Of The Site
BIS Certification (IS 4990: 1993)
High Repetition & Maximum Reuse
Factory-Sealed Moisture Barrier
Thickness
Approx. Weight
Standard Size
Physical Specifications & Bis Compliance (Is 4990)
| Parameter | Requirement (BIS Standard) | WonderPly Specification |
|---|---|---|
| Adhesive Type | Phenol Formaldehyde (BWP Grade) | PF Resin — Boiling Water Proof |
| Film Surface Type | Phenol impregnated film overlay | 120–150 GSM phenol film — both sides |
| Glue Bond Test | Boiling water test — 72 hrs, no delamination | Passes 72-hour boiling water test |
| Moisture Content | 5% – 15% | 8% – 12% |
| Core Construction | Cross-bonded hardwood veneers | BWP grade hardwood veneer core |
| Preservative Treatment | Mandatory per IS 4990 | Yes — pressure impregnated preservative |
| Thickness Tolerance (12mm) | +0 / -0.4mm | ±0.4mm |
| Thickness Tolerance (18mm) | +0 / -0.4mm | ±0.4mm |
| Squareness | ≤ 3mm per diagonal | ≤ 2mm — within tolerance |
| Warp | ≤ 5mm per 600mm x 600mm | ≤ 3mm — within tolerance |
| Face Smoothness | Smooth for concrete release | Film-faced — smooth concrete surface release |
| Termite Resistance | Recommended | Factory treated — termite resistant |
| Borer Resistance | Recommended | Factory treated — borer proof |
— Main Uses
- Heavy Infrastructure.Flyovers, Bridges, Elevated metro rail corridors, Highway overpasses, Tunnelling.
- Monolithic & Commercial Formwork: High-rise residential columns, monolithic shear walls, massive foundation rafts and basement retaining walls.
- Industrial Engineering: Precast Concrete Casting Beds, Cooling towers, Industrial Flooring Frames, Heavy Factory
Mechanical Properties
| Parameter | Requirement (BIS Standard) | WonderPly Specification |
|---|---|---|
| Modulus of Rupture (12mm) | Min. 24 N/mm² (IS 4990) | ≥ 28 N/mm² |
| Modulus of Rupture (18mm) | Min. 24 N/mm² | ≥ 30 N/mm² |
| Modulus of Elasticity | Min. 4500 N/mm² | ≥ 5500 N/mm² |
| Glue Bond (Dry) | Min. 1.0 N/mm² | ≥ 1.2 N/mm² |
| Glue Bond (Wet / Boil) | No delamination 72-hr boil | Certified pass |
| Compressive Strength (edge) | Suitable for concrete pour pressure | Tested — adequate for standard pour heights |
— FAQ
Frequently Asked Questions
Yes. WonderPly Shuttering Plywood is strictly tested in accordance with IS 1734 and IS 4990 provisions. Project-specific certified lab test reports detailing the Modulus of Rupture (MOR), Modulus of Elasticity (MOE), and 72-hour boiling water test performance can be provided upon request for corporate and government compliance approvals.
The weight indicates a high-density, fully cross-bonded hardwood core with zero core gaps. Lighter, uncalibrated sheets often contain softwoods or internal hollow gaps, which buckle and warp under the immense pressure of a wet concrete pour, potentially causing critical formwork failure on-site.
Wonderlam Industries coordinates closely with authorised dealers across India for corporate bulk supplies. You can submit your structural drawings, thickness requirements, and delivery schedule through our Project Inquiry Portal below to receive customised bulk quotes and commercial credit terms.