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SCG FRK-G 16 kg/m³ · 25 mm · 1.22 × 30.5 m
- Thickness (mm)
- 25
- Density (kg/m³)
- 16
- Width (mm)
- 1220
- Length (mm)
- 30500
- R (m²·K/W)
- 0.658
SCG FRK-G glass-wool duct wrap
Glass-wool roll for wrapping the outside of air-conditioning ducts, foil-faced on one side; it helps hold the air temperature and limit condensation on the duct.
- Thickness
- 25–50 mm
- Density
- 16–48 kg/m³
- Thermal conductivity (λ)
- 0.038 / 0.035 / 0.033 / 0.032 W/m·K 16 / 24 / 32 / 48 kg/m³ at 24 °C mean (test standard not stated)
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SCG FRK-G 16 kg/m³ · 38 mm · 1.22 × 30.5 m
- Thickness (mm)
- 38
- Density (kg/m³)
- 16
- Width (mm)
- 1220
- Length (mm)
- 30500
- R (m²·K/W)
- 1.000
Your selection
SCG FRK-G 16 kg/m³ · 50 mm · 1.22 × 15.25 m
- Thickness (mm)
- 50
- Density (kg/m³)
- 16
- Width (mm)
- 1220
- Length (mm)
- 15250
- R (m²·K/W)
- 1.316
Your selection
SCG FRK-G 24 kg/m³ · 25 mm · 1.22 × 30.5 m
- Thickness (mm)
- 25
- Density (kg/m³)
- 24
- Width (mm)
- 1220
- Length (mm)
- 30500
- R (m²·K/W)
- 0.714
Your selection
SCG FRK-G 24 kg/m³ · 38 mm · 1.22 × 15.25 m
- Thickness (mm)
- 38
- Density (kg/m³)
- 24
- Width (mm)
- 1220
- Length (mm)
- 15250
- R (m²·K/W)
- 1.086
Your selection
SCG FRK-G 24 kg/m³ · 50 mm · 1.22 × 15.25 m
- Thickness (mm)
- 50
- Density (kg/m³)
- 24
- Width (mm)
- 1220
- Length (mm)
- 15250
- R (m²·K/W)
- 1.429
Your selection
SCG FRK-G 32 kg/m³ · 25 mm · 1.22 × 15.25 m
- Thickness (mm)
- 25
- Density (kg/m³)
- 32
- Width (mm)
- 1220
- Length (mm)
- 15250
- R (m²·K/W)
- 0.758
Your selection
SCG FRK-G 32 kg/m³ · 38 mm · 1.22 × 15.25 m
- Thickness (mm)
- 38
- Density (kg/m³)
- 32
- Width (mm)
- 1220
- Length (mm)
- 15250
- R (m²·K/W)
- 1.152
Your selection
SCG FRK-G 32 kg/m³ · 50 mm · 1.22 × 15.25 m
- Thickness (mm)
- 50
- Density (kg/m³)
- 32
- Width (mm)
- 1220
- Length (mm)
- 15250
- R (m²·K/W)
- 1.515
Your selection
SCG FRK-G 48 kg/m³ · 25 mm · 1.22 × 7.5 m
- Thickness (mm)
- 25
- Density (kg/m³)
- 48
- Width (mm)
- 1220
- Length (mm)
- 7500
- R (m²·K/W)
- 0.781
See all models and sizesManufacturer documentsTechnical specifications
Product details
Green glass-wool roll, 3-way reinforced aluminium foil on one side · for wrapping ducts
- Thickness
- 25–50 mm
- Density
- 16–48 kg/m³
- Thermal conductivity (λ)
- 0.038 / 0.035 / 0.033 / 0.032 W/m·K 16 / 24 / 32 / 48 kg/m³ at 24 °C mean (test standard not stated)
- Service temperature range
- 4 – 230 °C
What is it?
SCG FRK-G is a green glass-wool roll for wrapping air-conditioning ducts, faced with 3-way reinforced aluminium foil on one side (foil, reinforcing scrim and kraft paper). The maker states a service temperature of 4–230 °C. Densities 16, 24, 32 and 48 kg/m³; thicknesses 25, 38 and 50 mm; 1.22 m wide.
What is it made of?
Glass wool (fibreglass) · Facing: 3-way reinforced aluminium foil, one side (described by the maker as fire-retardant) · Roll
Which sizes are available?
Thickness 25–50 mm · 16–48 kg/m³ — Choose a size
Limitations to know
The maker states a service temperature of 4–230 °C. Joints and any tears in the foil must be sealed with aluminium foil tape so moisture cannot enter the wool.
Where does the data come from?
SCG thermal insulation catalogue for air-conditioning and industrial work (pages 4–7: duct wrap)
Technical data from the manufacturer's documents SCG · Checked 12 Oct 2026
Technical specifications
All values come from the manufacturer's documents, with conditions and test standards. Values the documents do not state are not shown.
| Property | Value | Conditions / standard | Source |
|---|---|---|---|
| Thermal conductivity (λ) | 0.038 / 0.035 / 0.033 / 0.032 W/m·K | 16 / 24 / 32 / 48 kg/m³ at 24 °C mean (test standard not stated) | SCG thermal insulation catalogue for air-conditioning and industrial work (pages 4–7: duct wrap), p. 6 |
| Service temperature range | 4 – 230 °C | — | SCG thermal insulation catalogue for air-conditioning and industrial work (pages 4–7: duct wrap), p. 5 |
| Facing | 3-way reinforced aluminium foil, one side (foil / 3-way glass-fibre scrim / kraft paper) | — | SCG thermal insulation catalogue for air-conditioning and industrial work (pages 4–7: duct wrap), p. 6 |
| Reaction to fire | FS < 25 · SD < 50 | flame spread / smoke developed (surface burning characteristic) · ASTM E84 | SCG thermal insulation catalogue for air-conditioning and industrial work (pages 4–7: duct wrap), p. 6 |
| Moisture sorption | 0.2% by volume | ASTM C1104 | SCG thermal insulation catalogue for air-conditioning and industrial work (pages 4–7: duct wrap), p. 6 |
| Mould or fungus growth | Will not support or promote | ASTM C665 | SCG thermal insulation catalogue for air-conditioning and industrial work (pages 4–7: duct wrap), p. 6 |
| Standards / certification | Made to TIS 486, 487 and ASTM standards | The catalogue notes that certifications are available for selected products | SCG thermal insulation catalogue for air-conditioning and industrial work (pages 4–7: duct wrap), p. 5 |
Models and sizes available
| Model | Thickness (mm) | Density (kg/m³) | Width (mm) | Length (mm) | R (m²·K/W) |
|---|---|---|---|---|---|
| G 1625 | 25 | 16 | 1220 | 30500 | 0.658 |
| G 1638 | 38 | 16 | 1220 | 30500 | 1.000 |
| G 1650 | 50 | 16 | 1220 | 15250 | 1.316 |
| G 2425 | 25 | 24 | 1220 | 30500 | 0.714 |
| G 2438 | 38 | 24 | 1220 | 15250 | 1.086 |
| G 2450 | 50 | 24 | 1220 | 15250 | 1.429 |
| G 3225 | 25 | 32 | 1220 | 15250 | 0.758 |
| G 3238 | 38 | 32 | 1220 | 15250 | 1.152 |
| G 3250 | 50 | 32 | 1220 | 15250 | 1.515 |
| G 4825 | 25 | 48 | 1220 | 7500 | 0.781 |
Pack quantities and prices — ask us on LINE
Applications
Highlights
- Reinforced foil on one side
- Helps limit condensation on cold ducts
- Four densities, three thicknesses
Installation overview
- The duct surface must be clean, dry and free of rust, oil and leaks; leak-test before wrapping
- Cut to size, then strip 50 mm of wool from the edge so the facing forms a flap to overlap the joint
- Wrap with joints butted tight and seal every joint with aluminium foil tape at least 2.5 in wide
- On ducts wider than 24 in, fix the insulation on the underside with fasteners at no more than 18 in centres
- Inspect the facing and tape over any puncture or tear
Always follow the manufacturer's installation and safety instructions.
Related products
Alternatives
Duct and HVAC insulation · Glass wool
Microfiber Micro Duct Wrap FRK
- Thickness
- 25–50 mm
- Density
- 16–32 kg/m³
- Thermal conductivity (λ)
- 0.033–0.038 W/m·K
Duct and HVAC insulation · Stone wool
ROCKWOOL ROCKDUCT
- Max. temp.
- 350–540 °C
- Density
- 40–80 kg/m³
- Thickness
- 25–50 mm
Used together
Installation accessories · Tape
3T INSU-TAPE Aluminium Tape
- Width
- 50 / 63 mm
- Length
- 45 m
- Service temp.
- -20 – 120 °C
Installation accessories · Adhesive
3T INSU-BOND FiberTight
- Service temp.
- -15 – 90 °C
- Coverage
- 7.5 m²/kg
- Pack
- 10 kg
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