AlphaTex 4259-2-SS is a woven, alkali-free, aluminosilicate fiberglass impregnated with a specially formulated silicone elastomer at 25% by weight with great flame resistance, abrasion, flex, tear, and puncture toughness. AlphaTex 4259-2-SS is designed for higher mechanical strength at elevated temperatures via high silica, alumina, and calcium oxide content and superior protection against corrosion under insulation potential with lower leachable sodium ion contamination versus competitive products on the market today.
ADVANTAGES Greater thermal stability, lower propensity to contribute to corrosion under insulation, weather resistance, fluid resistance, UV resistance, low flame-smoke-and-toxicity, easily sewn, and has a thin lightweight profile.
APPLICATIONS This product is the next generation in high-temperature removable blankets, flange covers, and valve covers.
Lower Continuous Operating Temperature (°F): -65
Upper Continuous Operating Temperature (°F): 500
| Width | up to 60" |
|---|---|
| Color | Silver |
| Base Fabric | HR Glass, Satin Weave |
| Coating Type | Silicone |
| Thickness (in.) ASTM-D-1777 | 0.015 |
| Weight (oz/sy) ASTM-D-3776 | 17 |
| Lower Service Temperature Limit (°F) | -65 |
| Upper Service Temperature Limit, Continuous (°F) | 500 |
| Upper Service Temperature Limit, Short Term/Intermittent (°F) | 700 |
| Tensile Strength, Warp ASTM-D-5035 (lb/in.) | 450 |
| Tensile Strength, Fill ASTM-D-5035 (lb/in.) | 225 |
| Tear Strength, Warp ASTM-D-5587 (lb) | 90 |
| Tear Strength, Fill ASTM-D-5587 (lb) | 65 |
| Burst Strength ASTM-D-3786 (psi) | 600 |
| Flame Resistance - Afterglow (sec) ASTM D-6413 | 1 |
| Flame Resistance - Flameout (sec) ASTM D-6413 | 1 |
| Flame Resistance - Char Length (in.) ASTM D-6413 | 0.30 |
| Ends per Inch ASTM-D-3775 | 48 (±2) x 32 (±2) |
