Foil Scrim Kraft (FSK) is a high-quality insulation facing material engineered for superior thermal insulation, moisture control, and durability. By combining the reflective properties of aluminum foil, the strength of kraft paper, and the reinforcement of fiberglass scrim, Foil Scrim Kraft insulation delivers excellent performance in HVAC, building, and metal structure applications.
The foil layer acts as a radiant barrier, reflecting heat to enhance energy efficiency in heating and cooling systems. Meanwhile, the kraft paper and scrim reinforcement provide dimensional stability, tear resistance, and long-lasting protection during installation and service life.
Foil Scrim Kraft is a trusted solution across various construction and industrial settings where thermal management and moisture protection are paramount:
Composition |
Description |
Value (English) |
Value (Metric) |
Foil |
Aluminum |
0.28 mil |
7 micron |
Reinforcing- MD |
Fiberglass |
2/ inch |
8/100mm |
Reinforcing-XD |
Fiberglass |
3 /inch |
12/100mm |
Adhesive |
Heat-resistance |
- |
- |
Kraft |
Natural |
30lbs / 3000 ft2 |
50gsm |
Heat-Activated Coating |
Polyethylene |
0.8 mil |
20 micron |
Physical properties |
Test Method |
Value (English) |
Value (Metric) |
Basis weight |
Scale |
20.8lbs / 1000 ft2 |
102gsm |
Permeance (WVTR) |
ASTM E96, Procedure A |
0.02 perm |
1.15 ng/N.s |
Tensile Strength-MD |
ASTM D828 |
28.4 lbs / In |
125 N/25mm |
Tensile Strength-XD |
ASTM D828 |
14.8lbs / In |
65 N/25mm |
Burst Strength |
ASTM D774 |
43.5psi |
30 N/cm2 |
Low temperature Resistance |
ASTM D1790 4 hrs @ -40℉ (-40℃) |
Remains Flexible No Delamination |
Remains Flexible No Delamination |
High temperature Resistance |
ASTM D1790 4 hrs @ +240℉ (+116℃) |
Remains Flexible No Delamination |
Remains Flexible No Delamination |
Emissivity |
ASTM E408 |
-0.03 |
-0.03 |