
Mega Block - Hydrophobic Foam + Heat Shield
Keep your cabin cool with Mega Block, specifically designed to be a best-in-class heat shield by combining an aluminum reflective barrier with the excellent automotive heat insulation attributes of melamine foam. Mega Block is hydrophobic, lightweight, and flexible while reflecting 98% of radiant heat energy. Use it on the engine side of the firewall, as hood insulation, or any vehicle needing heat control including engine compartment insulation for your boat.
Product Usage
Flammability Ratings: | Description: | Rating: |
UL 94 HF-1 | Horizontal Burning | Pass |
UL 94 V-0 | Vertical Burning | Pass |
FAR 25.853 (a, i) | 60 Sec Vertical |
Burn Time (Avg): 0 Seconds Burn Length (Avg): 2” Drip Extinguish Time: No Drip |
FAR 25.856, BSS7365, AITM 2.0053 | Radiant Panel |
After Flame: 0 Seconds Flame Propagation: < 1” |
ASTM 662-83, BSS7238 | Smoke Generation |
Flaming: Ds (1.5 min) = 57 Ds (4.0 min) = 77 |
BSS7239 | Toxicity | Pass |
ASTM E 84 | Steiner Tunnel, 1inch thick |
Flame Spread < 25 Smoke Developed < 50 |
ASTM E 162-83 | Surface Flammability |
Flame Spread factor 1.83 Heat Evolution factor 2.50 Flame Spread index 4.62 |
DIN 5510 |
Flammability: S4 Smoke: SR2 Drips: ST2 |
Foil Heat Shield Specifications
Base Fabric Type: | Plain Weave Fiberglass |
Aluminum Foil thickness: | 0.001 inches |
Composite Characteristics: | |
Thickness (ASTM-D1777-96): | 0.02” (Nominal) |
Weight (ASTM-D-3776-96): | 0.1225 lb/sft (Typical) |
Tensile Strength:(ASTM-D-5035-95): | Warp-75 lb/in |
Fill- 50 lb/in | |
Flame Resistance (FED 191/5903-2): | |
Flame Out | 1 sec max |
Afterglow | 1 sec max |
Char Length | 1 inch max |
Temperature Range: | |
Composite | *-40°F to 1,000°F |
1000°F requires 2” between the heat shield and the heat source |
*PSA Temperature Range: -40°F to 450°F |
Acoustical Properties
ASTM E1050 testing method used to record acoustical absorption coefficients at various thicknesses and frequencies.
Frequency (Hz)
Foam Thickness: | 125 | 250 | 500 | 1000 | 2000 | 4000 |
0.25 in. | 4 | 5 | 10 | 20 | 39 | 81 |
0.50 in. | 11 | 12 | 25 | 42 | 77 | 94 |
1.0 in. | 18 | 23 | 50 | 82 | 99 | 99 |
2.0 in. | 31 | 60 | 75 | 90 | 100 | 100 |
3.0 in. | 42 | 67 | 81 | 96 | 100 | 100 |
4.0 in. | 53 | 80 | 90 | 99 | 100 | 100 |