Product brief description
Fiberglass insulation has ruled HVAC for decades — but the trade-offs are itchy skin, airborne fibers, and R-value that collapses when wet. This NBR/PVC closed-cell foam sheet eliminates every one of those problems. The closed-cell structure is inherently waterproof, maintaining its full insulating performance even in high-humidity environments. The flexible rubber body bends around duct elbows and pipe bends without cracking. Because there are no fibers, there's no need for protective clothing or respirators during installation.
Product detailed description
The Insulation Problem Nobody Talks About
Open a 10-year-old air handler and look at the internal insulation. If it's fiberglass, it's likely sagging, darkened with dust, and damp from condensation. This foam sheet changes that equation. It doesn't sag because it's a structural foam, not a fiber batt. It doesn't absorb water because every cell is an independent, sealed bubble. It doesn't shed fibers into the airstream. Install it once, and it performs for the life of the equipment.
Closed-Cell Chemistry — Why Water Is the Enemy
When fiberglass gets wet, water fills the air spaces between fibers. Since water conducts heat 25 times better than air, wet insulation becomes a conductor. Our NBR foam doesn't have this failure mode. Even if the outer surface is punctured, only the damaged cells are affected — 99% of the foam continues to provide full thermal resistance.
Cut It, Glue It, Done
Installation speed is where this foam sheet separates from the rest. It can be cut with a standard utility knife — score and snap, same as drywall. Contact adhesive bonds it permanently to galvanized steel, aluminum, and PVC. A typical duct panel section takes under 2 minutes to insulate from start to finish, with no mechanical fasteners or taping seams required.
Acoustic Bonus — Sound Dampening
The cellular structure converts acoustic energy into microscopic amounts of heat through viscoelastic damping. Applied to ductwork, it reduces "breakout noise" — the rumble that escapes into occupied spaces. For outdoor units, lining the interior reduces radiated noise that triggers neighbor complaints.
Layer It for Higher R-Value
A single 10mm sheet provides approximately R-1.5 thermal resistance. For extreme environments like freezer rooms or outdoor rooftop ducts, sheets can be layered to reach R-6 or higher. The closed-cell structure ensures no thermal bridging between layers, providing a massive thermal barrier in half the thickness of traditional materials.
Product Specifications
RAMETER |
SPECIFICATION |
Material |
NBR/PVC closed-cell foam, Black |
Sheet Size |
1000 mm × 2000 mm (Standard) |
Coverage |
2.0 m² per sheet |
Thickness |
6mm, 10mm, 13mm, 15mm, 20mm, 25mm, 32mm, 50mm |
Density |
40–60 kg/m³ (Standard) |
Cell Structure |
Closed-cell, water absorption <1% by volume |
Thermal Conductivity |
≤0.038 W/(m·K) at 0°C |
Service Temp |
-40°C to +105°C |
Fire Rating |
UL 94 HF-1 (Self-extinguishing); FMVSS 302 |
Tensile Strength |
≥0.3 MPa |
Certifications |
ISO 9001, RoHS, REACH |
Lead Time |
15–30 days depending on order volume |
FAQ
Q1: What is the difference between this foam sheet and fiberglass duct wrap?
A: NBR foam is waterproof, fiber-free, and has a built-in vapor barrier. Unlike fiberglass, it won't sag, itch, or lose R-value when exposed to moisture.
Q2: Can the foam sheet be used outdoors?
A: Yes, but it should be protected from direct UV. For rooftop ducts or exterior pipes, we recommend a protective jacket like aluminum cladding or UV-resistant paint to prevent surface aging.
Q3: How do I bond the foam sheet to a metal surface?
A: Use a neoprene-based contact adhesive. Apply to both the metal and
Q4: How do I cut complex shapes?
A: Use a standard utility knife. For straight lines, score and snap. For circles or penetrations, the foam is flexible enough to be cut with scissors or a knife with multiple passes.
Q5: Is it suitable for soundproofing?
A: Yes, it significantly reduces vibration and breakout noise in HVAC systems, making it an excellent dual-purpose insulation for air handlers and ductwork.
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