Product Characteristics

General Properties

Maximum Service Temperature: 350�C (622�F)
Moisture Absorption: Less than 5% by weight (ASTM C665)
Alkalinity: PH9, slightly alkaline
Corrosiveness: Does not accelerate
(with steel, copper or aluminium) Odour: None
Capillarity (after 24 hours): Negligible
Shrinkage: None
Resistance to fungus and bacteria: Does not promote

Polygold® Hush has been tested to calculate the Sound Absorption Coefficient of Glasswool Insulation at The University of Auckland's UniServices commercial division.

Thermal Conductivity
at 15°C (59°F) mean temperature

Density kg/m³	K Value
Density kg/m³	W/m°C	BTU-in/(hrft²°F)
10	0.0476	0.33
16	0.0404	0.28
24	0.0375	0.26
32	0.0346	0.24

Surface Burning Characteristics

Polygold® Insulation Blankets meet the Surface Burning Index requirements of NFPA 90A and 90B standards FHA when tested in accordance with ASTM E84. Fire Hazard Classification 25/50.

Fire Properties

Polygold® Insulation Blankets are non-combustible and are tested in accordance with:
B. S. 476 : Part 6 Fire propagation
B. S. 476 : Part 7 Surface spread of flame
Complies with BOMBA Class �O� certification and other Building Regulations.

Early Fire Hazards

Polygold® Insulation Blankets do not ignite, evolve heat, spread flame or develop smoke when tested in accordance with Australia Standard 1530 : Part3-1982.

Ignitability Index	0
Heat Evolved Index	0
Spread of Flame Index	0
Smoke Developed Index	0~1

Compressive Strength

Polygold® Insulation Blankets have excellent resilience. It will recover to its nominal thickness after prolonged compression.

Acoustical Performance Test Method ASTM C423. Type 'A' mounting.

Density kg/m³	Thickness (mm)	Centre Frequency (Hz)
Density kg/m³	Thickness (mm)	125	250	500	1000	2000	4000	NRC
10	50	0.46	0.62	0.88	0.87	0.86	0.97	0.80
16	50	0.39	0.68	1.06	1.03	0.91	0.98	0.91
24	50	0.36	0.64	1.04	1.06	1.05	1.10	0.95
32	50	0.38	0.72	1.11	1.07	1.04	1.07	1.00

Polygold� Premium Thermal Insulation Blanket

Thickness (mm)	R-Value m²K/W	Length (m)	Width (mm)	Area (m²)	Roll	Hush NRC Value	BRANZ Appraisal
75	R1.8	15	1200	18	1
100 Hush	R2.3	10	1200	12	1	1.05	Appraised
110 Hush	R2.8	7	1200	8.4	1	1.10	Appraised
120 Hush	R3.2	5	1200	6	1	1.05	Appraised
140	R3.6	5	1200	6	1		Appraised

Polygold� Premium Thermal Insulation Biscuits

Thickness (mm)	R-Value m²K/W	Design Use	Length (m)	Width (mm)	Area (m²)	Pieces	Hush NRC Value	BRANZ Appraisal
75	R1.8	Ceiling	1.22	0.432	12.12	23
75	R1.8	Wall	1.14	0.580	15.21	23
90	R2.2	Ceiling	1.22	0.432	10.54	20
90	R2.2	Wall	1.14	0.580	13.22	20
120	R2.6	Ceiling	1.22	0.432	9.49	18		Appraised
90 Hush	R2.6	Wall	1.14	0.580	6.61	10	1.10
150	R3.6	Ceiling	1.22	0.432	8.43	16		Appraised
190	R4.0	Ceiling	1.22	0.432	7.38	14
190	R4.6	Ceiling	1.22	0.432	6.32	12