Medium Silica Fabrics (RS)
Medium silica woven fabrics, SiO2 70%±5%, for intermediate-temperature protection. Continuous 800°C, transient 950°C. Grades RS-400 to RS-1300.
Medium silica (RS) fabrics sit between E-glass and high silica: a silica-based woven textile for intermediate-temperature protection, welding environments and thermal insulation. Select the grade by exposure — temperature, sparks and slag, abrasion, bending and mechanical load — not by a single temperature number.
Material and temperature
RS fabrics are woven from medium-silica fiber, SiO2 70%±5%. Continuous service temperature 800°C; transient exposure up to 950°C. These are base-fabric figures. A coated or finished product follows the limits of its own construction — the coating limit is not the substrate limit, and the substrate limit is not the coated-product limit.
Grades
Grade | Weave | Weight (g/m²) | Thickness (mm) | Width (cm) | Density (ends/cm) | Tensile warp/weft (N) |
RS-400 | 3×1 Twill | 380±30 | 0.40 | 100±1, 152±1 | 18×13 | >800 / >500 |
RS-600 | 8HS Satin | 650±30 | 0.75 | 92±1, 100±1, 152±1 | 18×13 | >1500 / >1000 |
RS-1100 | 12HS Satin | 1150±50 | 1.30 | 92±1, 100±1, 152±1 | 18×13 | >1800 / >1500 |
RS-1300 | 12HS Satin | 1350±50 | 1.50 | 92±1, 100±1, 152±1 | 18×13 | >2000 / >1600 |
Strengths and limits
RS grades are valued for tensile strength and abrasion resistance; in the specification tables, RS grades list higher tensile values than HS grades at comparable weights. Whether RS or HS fits an application still depends on temperature, exposure and mechanical load — higher tensile strength does not automatically mean higher temperature capability. Where continuous 1000°C service is required, high silica is the choice.
Typical uses
Welding blankets and heavy-duty welding environments — RS is one of the base-fabric options for VETEX welding blankets. Thermal insulation and protection where 800°C continuous service is required. Constructions where tensile strength and abrasion resistance matter. Confirm the grade, coating and test scope per application.
How to specify
Tell us your application, base fabric, finished weight, thickness, coating type, single or double sided, width, roll length, color, and required standard / test method. If you are unsure about any parameter, leave it blank or choose Help me choose — VETEX will help select the construction.