Cork Wonder Pads
Cork Wonder Pads are two-component laminated pads constructed with plain cork on Side 1 (offered in 1/8″, 3/16″, and 1/4″ thicknesses) and a static-cling polyvinyl chloride (PVC) foam on Side 2. The PVC foam adheres to non-porous surfaces such as glass and mirror without any adhesive — providing residue-free, removable, and repositionable protection for shipping and storage of fragile non-porous goods. Cork side: ≥242 kPa tensile strength, ≥75% recovery at 100 PSI per ISO 7322. PVC foam side: 12 oz/in minimum cling adhesion to both stainless steel and cork.
Key Properties
- Side 1 Material: Plain Cork (1/8″, 3/16″, 1/4″ thicknesses)
- Side 2 Material: PVC Foam (static-cling, adhesive-free)
- PVC Foam Cling Adhesion (Cork & Stainless Steel): 12 oz/in minimum
- Cork Tensile Strength: ≥242 kPa (ISO 7322)
- Cork Recovery @ 100 PSI: ≥75% (ISO 7322)
- Cork Specific Weight: ≥160 kg/m³ (ISO 7322)
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- Specifications
- Applications
- General Info
- FAQs
Specifications
Side 1 — Plain Cork Layer
| Property | Value | Test Method |
| Thickness | 1/8″, 3/16″, 1/4″ | — |
| Color | Natural | — |
| Material / Substrate | Plain Cork | — |
| Compressibility @ 100 PSI | 35% – 55% | ISO 7322 |
| Boiling Water | No disaggregation | ISO 7322 |
| Tensile Strength | ≥242 kPa | ISO 7322 |
| Binder | Polyurethane | — |
| Cork Granule Size | 0.5 mm | — |
| Recovery @ 100 PSI | ≥75% | ISO 7322 |
| Specific Weight | ≥160 kg/m³ | ISO 7322 |
Side 2 — Static-Cling PVC Foam Layer
| Property | Value | Test Method |
| Material / Substrate | Polyvinyl Chloride (PVC) Foam | — |
| Adhesion to Cork | 12 oz/in minimum | — |
| Adhesion to Stainless Steel | 12 oz/in minimum | — |
| Tensile Strength | 20 psi | ASTM D412 (Die A) |
| Water Absorption | 3% | ASTM D1056 |
| Compression Deflection | 5.0 psi | ASTM D1667 |
| Density | 7–15 lb/ft³ | — |
| Durometer / Hardness (Shore 00) | 45 | ASTM D2240 |
Foam without adhesive or liner unless noted. Specifications based on a sample size of three to five.
Shelf Life / Storage
| Property | Value | Test Method |
| Shelf Life (with adhesive) | 6 months from date of production, stored at or below 75°F | — |
| Shelf Life (without adhesive) | 2 years from date of production, stored at or below 75°F | — |
| Recommended Storage Conditions | 20 ±3°C / 60 ±5% RH | — |
- Glass separation and mirror shipment protection where adhesive-free cling and cork cushioning are both required
- Disposable protective interleaving for any non-porous glass surface during transportation and storage
- Stacked-glass interlayer pads for warehouse, distribution, and shipping operations
- Mirror manufacturing and converting where cork cushion meets a residue-free cling backing
- Non-porous surface protection in stoneware, tile, and finished-glass logistics
Common industries: Glass and mirror manufacturing, transportation and packaging, stoneware and tile distribution, surface protection, industrial logistics.
Cork Wonder Pads are two-sided laminated protective pads designed primarily for glass separation and mirror shipment, and as disposable protection for any glass surface. The construction laminates a plain cork layer (with polyurethane binder, 0.5 mm cork granule size) to an adhesive-less, static-cling PVC foam layer — combining the cushioning and protective characteristics of cork with the residue-free clinging behavior of PVC foam.
Critically, the PVC foam adheres to non-porous surfaces such as glass through surface-energy interaction (cling) rather than chemical adhesive bonding, which is why removal leaves no residue and the pads can be repositioned and reused.
The cork side delivers reliable mechanical performance per ISO 7322: 35–55% compressibility at 100 PSI, ≥75% recovery, ≥242 kPa tensile strength, no disaggregation under boiling water exposure, and ≥160 kg/m³ specific weight. The 0.5 mm cork granule size and polyurethane binder produce a uniform protective surface against glass and mirror substrates.
The PVC foam side provides 12 oz/in minimum cling adhesion to both cork (relevant to lamination integrity) and stainless steel (representative of non-porous substrate cling), with 5.0 psi compression deflection per ASTM D1667, 20 psi tensile strength per ASTM D412 Die A, 7–15 lb/ft³ density, Shore 00 hardness of 45 per ASTM D2240, and 3% water absorption per ASTM D1056.
Shelf life is 6 months with adhesive or 2 years without adhesive when stored at or below 75°F (recommended conditions 20 ±3°C / 60 ±5% RH).
What differentiates Cork Wonder Pads from standard cork pads or standalone cling foam?
Cork Wonder Pads combine two distinct protection mechanisms in a single laminated pad: cork cushioning (with the mechanical and protective properties of agglomerated cork) on one face, and adhesive-free PVC static-cling on the opposite face. Standalone cork pads typically require either no fastening or a separate adhesive; standalone cling foam (such as the GP Cling Foam) provides only the cling layer. The combined construction enables single-step deployment between glass sheets in shipping operations, with the cling face holding to one piece of glass and the cork face cushioning the next.
Why is cling adhesion important when selecting these pads?
For glass-separation pads, the cling adhesion measures how reliably the PVC foam holds to the non-porous glass surface during shipping vibration without using any chemical adhesive. The 12 oz/in minimum value to stainless steel confirms reliable cling on non-porous surfaces, while the 12 oz/in to cork supports laminate integrity between the two pad layers. Because the cling mechanism is surface-energy based rather than chemical, removal leaves no residue on the glass.
What is the operating temperature range for Cork Wonder Pads?
The TDS does not publish a service temperature range. Recommended storage conditions are 20 ±3°C / 60 ±5% RH (approximately 64–73°F). Specifiers requiring service temperature data should contact H-O Products directly.
Are Cork Wonder Pads suitable for direct contact with finished glass and mirror surfaces?
Yes. The TDS explicitly identifies glass separation and mirror shipments as primary applications, and the PVC foam cling-bonding mechanism is designed for residue-free, repositionable contact with non-porous glass surfaces. The product is described as removable, repositionable, and using a non-residue bonding system. No specific regulatory compliance standards are listed on the TDS for this material.
How should Cork Wonder Pads be specified?
Specify product (Cork Wonder Pads), cork thickness (1/8", 3/16", or 1/4"), cork granule size (0.5 mm), binder (polyurethane), cling layer (PVC foam), application surface (glass, mirror, or other non-porous substrate), compliance requirements, dimensional tolerances, and finished format.
