30 PPI Uncoated Reticulated Foam
30 PPI Uncoated Reticulated Foam is a compressible open cell polyether polyurethane foam with a nominal cell count of 30 ppi ±5 (CREST), a density of 1.4 lb/ft³ ±0.10, and a volumetric air flow rate of 18 cfm ±2 per ASTM D3574-91. It is designed to weep moisture while minimizing the infiltration of drafts, water, dust, and insects into buildings and cavities, and is used inside extrusions and cavities where it is not exposed to UV or sunlight. It is the finest-pore, lowest air flow grade among the fully specified uncoated reticulated foam grades.
Key Properties
- Compression Force Deflection @ 25%: 0.55 psi ±0.10 (ASTM D3574-91)
- Compression Set @ 50% Deflection: 25% loss maximum (ASTM D3574-91)
- Tensile Strength: 20 lb/in minimum (ASTM D3574-91)
- Elongation @ Break: 180% minimum (ASTM D3574-91)
- Density: 1.4 lb/ft³ ±0.10 (ASTM D3574-91)
- Volumetric Air Flow Rate: 18 cfm ±2 (ASTM D3574-91)
We want to help!
Enter your information and we'll get you in touch with our knowledgable staff. We know how important to the right product for your project.
Request a Consultation
- Specifications
- Applications
- General Info
- FAQs
Physical Properties
| Property | Value | Test Method |
| Thickness | 1/4″, 3/8″, 5/8″, 1/2″, 3/4″, 7/8″, 1″, 1-1/8″, 1-1/4″, 1-3/8″, 1-1/2″, 1-3/4″, 2″ | — |
| Material/Substrate | Polyether Polyurethane Foam | — |
| Color | Charcoal Gray | — |
| Cell Structure | Open Cell | — |
| Cell Count | 30 ppi ±5 | CREST |
| Foam Grade | T-30 | CREST |
| Density | 1.4 lb/ft³ ±0.10 | ASTM D3574-91 |
Mechanical Properties
| Property | Value | Test Method |
| Compression Force Deflection @ 25% | 0.55 psi ±0.10 | ASTM D3574-91 |
| Compression Set @ 50% Deflection | 25% loss maximum | ASTM D3574-91 |
| Tensile Strength | 20 lb/in minimum | ASTM D3574-91 |
| Elongation @ Break | 180% minimum | ASTM D3574-91 |
| Tear Strength | 5 lb/in minimum | ASTM D3574-91 |
Acoustic / Air Flow
| Property | Value | Test Method |
| Volumetric Air Flow Rate | 18 cfm ±2 | ASTM D3574-91 |
| Air Pressure Drop | 0.15 ±0.05 | ASTM D3574-91 |
Flame & Fire Performance
| Property | Value | Test Method |
| Flame Retardant | Flame retardant upon request | — |
Aging Performance
Dry Heat Aging
| Property | Value | Test Method |
| Tensile Strength Dry Heat Loss | 20% maximum | ASTM D3574-91 |
Autoclave Aging
| Property | Value | Test Method |
| Compression Set @ 50% Deflection Autoclave Loss | 25% maximum | ASTM 3574-91 |
| 25% Compression Load Deflection Autoclave Loss | 15% maximum | ASTM D3574-91 |
- Weep baffling in commercial and residential construction requiring fine particulate filtration while still weeping moisture, with the full available thickness range up to 2″
- General filtering applications inside extrusions and cavities not exposed to UV or sunlight where the finest filtration among the fully specified uncoated grades is required
- NEMA enclosure and generator or compressor housing ventilation where finer particle exclusion is required alongside controlled air flow
- Moisture infiltration barriers in building envelope assemblies where 30 PPI pore structure provides enhanced resistance to fine particulate while maintaining weeping capability
- Draft and air infiltration seals in doors, windows, and access panels where the finest-pore fully specified uncoated grade is needed for maximum filtration efficiency
Common industries: construction, fenestration, HVAC, electrical enclosures, industrial equipment.
The 30 PPI Uncoated Reticulated Foam is a fine-pore grade in H-O Products’ uncoated reticulated foam series, with a nominal cell count of 30 ppi and a volumetric air flow rate of 18 cfm ±2. It is a compressible polyether polyurethane foam designed for general filtering applications, weep baffling in commercial and residential construction, and use inside extrusions and cavities not exposed to UV or sunlight.
Its denser skeletal structure provides higher filtration efficiency against drafts, moisture, insects, and dust compared to the coarser grades.
Per the TDS note, the Crest visual PPI standard is the industry accepted nomenclature for defining reticulated foam pore size; however, the air flow is the only quantifiable value for determining PPI for published specifications, and the only exception allowed is if visual PPI is agreed as a standard in advance prior to order submission.
Density is 1.4 lb/ft³ ±0.10. Compression force deflection at 25% is 0.55 psi ±0.10. Compression set at 50% deflection is 25% loss maximum. Tensile strength is 20 lb/in minimum with a dry heat loss maximum of 20%. Elongation at break is 180% minimum. Tear strength is 5 lb/in minimum. Air pressure drop is 0.15 ±0.05 per ASTM D3574-91. Autoclave compression set loss is 25% maximum and 25% compression load deflection autoclave loss is 15% maximum. A flame retardant formulation is available upon request.
No compliance standards are specified on the manufacturer’s TDS for this material.
What differentiates the 30 PPI Uncoated grade from the coarser 10 PPI and 20 PPI uncoated grades and from the finer 45 PPI grade?
The 30 PPI grade has a volumetric air flow of 18 cfm ±2 — lower than the 20 PPI's 22 cfm ±3.5 and 10 PPI's 25.5 cfm ±4.5 — and has higher compression set allowances (25% loss maximum vs. 15% for the coarser grades), which should be considered in sustained-compression applications. The 45 PPI grade provides even finer filtration at 12.5 cfm ±2 but with a narrower available thickness range (1/4" to 1"). The 30 PPI grade offers the finest filtration available in the full thickness range up to 2".
Why is compression force deflection important for an uncoated reticulated foam used in weep baffling and filtration?
Compression force deflection determines how readily the foam compresses to fill a cavity under installation force. The 30 PPI grade has a CFD of 0.55 psi ±0.10 at 25% — the highest among the standard fully specified uncoated grades (10, 20, and 30 PPI) — reflecting the greater resistance of its finer skeletal structure. This is relevant in tight-tolerance extrusions and helps maintain consistent contact with cavity walls for reliable filtration performance.
What is the service temperature range for the 30 PPI Uncoated Reticulated Foam?
A specific service temperature range is not stated on the manufacturer's TDS for this material. Aging performance data includes tensile strength dry heat loss of 20% maximum per ASTM D3574-91 and autoclave aging performance per ASTM 3574-91 and ASTM D3574-91.
Is the 30 PPI Uncoated Reticulated Foam suitable for regulated environments?
No compliance standards are specified on the manufacturer's TDS for this material. A flame retardant formulation is available upon request. The standard uncoated grade is for use in applications not exposed to UV or sunlight, as stated on the TDS.
How should the 30 PPI Uncoated Reticulated Foam be specified?
Specify grade (30 PPI Uncoated Reticulated Foam, Foam Grade T-30), thickness, color (Charcoal Gray), compliance requirements if applicable, dimensional tolerances, and finished format. Per the TDS, air flow is the only quantifiable value for determining PPI for published specifications.
