Basalt Fiber Sleeving
Model:KXT
Basalt fiber sleeving (model KXT BF700) is a tubular insulation sleeve braided from continuous basalt filament yarn. Continuous service temperature −260 °C to +700 °C, short-term peak up to +750 °C, melting point around +1350 °C. Thermal conductivity 0.031–0.038 W/m·K, good electrical insulation, good resistance to acids and alkalis. Standard braided inner diameter 4–80 mm; silicone-coated and fire-retardant versions available. Supplied by an ISO 9001 certified factory in Ningbo, China. Reply within 2 business hours.
What Is Basalt Fiber Sleeving?
Basalt fiber sleeving (also called basalt sleeve or basalt fiber braided sleeve; Kaxite model KXT BF700) is a tubular insulation sleeve braided from continuous basalt filament yarn. Basalt fiber is produced by melting natural basalt rock at around 1450–1500 °C and drawing it into continuous filaments — a process similar to glass fiber production but using volcanic rock as the raw material instead of synthetic glass batch. The braided sleeve retains the fiber's high temperature resistance, good electrical insulation and good chemical stability.
Basalt fiber sleeving is a middle-ground material between glass fiber sleeving and ceramic fiber sleeving: it tolerates higher temperature than standard E-glass, and costs less than ceramic fiber. Standard braided inner diameters range from 4 mm to 80 mm, and silicone-coated, fire-retardant and vermiculite-coated versions are available on request.
Basalt Fiber Sleeving — Key Specifications
ModelKXT BF700
MaterialContinuous basalt filament yarn
Continuous Temp−260 °C to +700 °C
Short-Term PeakUp to +750 °C
Melting PointAround +1350 °C
Thermal Conductivity0.031 – 0.038 W/m·K
Braided ID4 – 80 mm
ColourGolden brown to dark brown
Chemical ResistanceGood to acids and alkalis
Electrical InsulationGood dielectric strength
Coating OptionsSilicone, fire-retardant, vermiculite
LengthStandard 30 m rolls; custom cuts
Why Choose Basalt Fiber Sleeving
Basalt fiber sleeving is selected for high-temperature protection when glass fiber is not enough and ceramic fiber is over-spec. Key advantages of basalt fiber sleeving include:
- Higher temperature than glass fiber — continuous service up to +700 °C, compared with around +550 °C for standard E-glass sleeving.
- Lower cost than ceramic fiber — ceramic fiber sleeving handles higher temperatures, but basalt fiber is a more economical choice when the working temperature is within its range.
- Good chemical stability — basalt fiber has good resistance to acids, alkalis and most industrial chemicals, and better alkali resistance than E-glass.
- Good electrical insulation — suitable for high-temperature cable and wire protection.
- Low thermal conductivity — 0.031–0.038 W/m·K, similar to glass fiber and lower than many metals.
- Flexible and easy to install — the braided construction slides over cables, hoses and pipes without special tooling.
- Coating options — silicone coating adds abrasion, moisture and oil resistance; vermiculite coating improves molten metal splash resistance.
Basalt Fiber Sleeving — Technical Data Sheet
| Property | Typical Value |
|---|---|
| Material | Continuous basalt filament yarn |
| Continuous service temperature | −260 °C to +700 °C |
| Short-term peak temperature | Up to +750 °C |
| Melting point | Around +1350 °C |
| Thermal conductivity | 0.031 – 0.038 W/m·K |
| Standard braided inner diameter | 4 – 80 mm |
| Wall thickness | 1.5 – 3.0 mm (size-dependent) |
| Colour | Golden brown to dark brown |
| Chemical resistance | Good to acids, alkalis and most industrial chemicals |
| Electrical insulation | Good dielectric strength |
| Standard roll length | 30 m (custom cut lengths on request) |
| Coating options | Silicone-coated, fire-retardant, vermiculite-coated |
Values above are typical for the KXT BF700 family. Please request the current data sheet for the exact grade and size you require.
Handling note — please read before cutting or installing. Basalt fiber is a mineral fiber. Cutting, machining or demolition can generate respirable fiber dust that may cause skin and respiratory irritation. Use appropriate dust extraction, gloves and a dust mask when cutting or installing the sleeving, and follow local health and safety regulations. Silicone-coated versions generate less dust during handling. Not for food-contact or potable-water use.
Basalt Fiber vs Glass Fiber vs Ceramic Fiber Sleeving
Buyers often compare basalt fiber sleeving with glass fiber and ceramic fiber sleeving. The table below summarises the main differences to help select the right material for each application.
| Property | Basalt Fiber | E-Glass Fiber | Ceramic Fiber |
|---|---|---|---|
| Continuous service temperature | Up to +700 °C | Up to ~+550 °C | Up to +1260 °C |
| Short-term peak | +750 °C | ~+600 °C | +1350 °C |
| Alkali resistance | Good | Fair | Good |
| Tensile strength | Good | Good | Moderate |
| Thermal conductivity | 0.031–0.038 W/m·K | 0.034–0.040 W/m·K | 0.06–0.13 W/m·K |
| Cost | Medium | Low | High |
| Best for | High-temp cable and pipe protection where cost matters | Low-cost general thermal insulation | Extreme high-temperature or molten metal splash |
For general insulation up to +550 °C, E-glass fiber sleeving is the most economical choice. For continuous service up to +700 °C, basalt fiber sleeving is the recommended middle ground. For continuous service above +700 °C or molten metal splash, choose ceramic fiber sleeving. See Ceramic Fiber for the full range.
Typical Applications of Basalt Fiber Sleeving
Basalt fiber sleeving is specified wherever a flexible, high-temperature insulation sleeve is required. Common applications include:
- Cable and wire protection — high-temperature electrical cables in industrial furnaces, kilns and heat treatment equipment.
- Automotive and exhaust systems — exhaust pipe heat shielding, sensor cable protection and engine compartment insulation.
- Hose and pipe insulation — protecting process hoses, fuel lines and hydraulic lines from radiant heat.
- Industrial furnace wiring — thermocouple leads, heating element connections and control wiring.
- Metallurgy and foundry — protection of cables and hoses near molten metal, with vermiculite-coated versions.
- Power generation — boiler, turbine and steam line cable protection.
- Chemical processing — insulation of process lines carrying high-temperature fluids.
Custom Fabrication & Ordering Options
We supply basalt fiber sleeving in the form that best fits your production line. Tell us the inner diameter, working temperature and quantity and we will quote the closest standard size or a custom run.
| Option | Available Range |
|---|---|
| Form | Round braided sleeve, flat braided sleeve, expandable braided sleeve |
| Inner diameter | 4 – 80 mm (custom on request) |
| Wall thickness | 1.5 – 3.0 mm standard |
| Length | Standard 30 m rolls; custom cut lengths on request |
| Coating | Uncoated, silicone-coated, fire-retardant, vermiculite-coated |
| Colour | Natural golden brown; black or red silicone-coated versions available |
| Branding | Neutral packing or your own label — OEM / ODM welcome |
Send us the cable or pipe OD, working temperature and quantity and we will quote the most economical basalt fiber sleeving size. Related grades: Basalt Fiber Yarn, Basalt Fiber Rope, Basalt Fiber Tape, Basalt Fiber Cloth.
Need a price for basalt fiber sleeving today? Tell us inner diameter, quantity and temperature requirement — our technical sales team replies within 2 business hours.
Quality Assurance & Supplier Commitments
ISO 9001:2015Manufacturing under an ISO 9001 certified quality management system.
Material ListIncoming basalt yarn grade, filament diameter and batch number recorded for full traceability.
Response SpeedTechnical sales team replies within 2 business hours for quotes and technical questions.
Batch TestingInner diameter, wall thickness, braid density and surface finish checked per batch.
Third-Party InspectionSGS, BV, TÜV or your nominated inspector welcome before shipment.
Free SamplesFree short sleeve samples for evaluation; courier cost deductible from the first order.
Ordering, Packing & Delivery
| Item | Details |
|---|---|
| Minimum order quantity | 100 kg for standard sizes (negotiable for trial orders and mixed containers) |
| Sample policy | Free short sleeve samples for evaluation; buyer covers courier cost |
| Lead time | Typically 15 – 25 days after order confirmation; stock items ship faster |
| Packing | Sleeving wound on cardboard cores or in hanks, then in export cartons or woven bags on pallets |
| Shipping | Sea, air or express; FOB Ningbo/Shanghai, CIF, DDP on request |
| Payment | T/T, L/C at sight, and other terms to be agreed |
| Documentation | Commercial invoice, packing list, bill of lading, certificate of origin, test report |
Lead times are indicative and confirmed per order.
Frequently Asked Questions
What is basalt fiber sleeving used for?
Basalt fiber sleeving is used for high-temperature insulation and protection of cables, wires, hoses, pipes and process lines. Typical applications include cable and wire protection in industrial furnaces, automotive and exhaust system heat shielding, hose and pipe insulation, high-temperature electrical insulation and thermal protection of process lines in metallurgy, chemical and power generation industries.
What is the maximum temperature of basalt fiber sleeving?
Continuous service temperature is −260 °C to +700 °C. Short-term peak temperature can reach +750 °C, and the basalt fiber melts at around +1350 °C. For continuous service above +700 °C, we recommend ceramic fiber sleeving instead. Tell us your actual temperature cycle and we will confirm the appropriate grade.
What is the difference between basalt fiber and glass fiber sleeving?
Basalt fiber sleeving has a higher continuous service temperature (up to +700 °C) than standard E-glass fiber sleeving (up to around +550 °C). Basalt fiber also has better alkali resistance, higher tensile strength and better thermal stability at elevated temperature. The cost of basalt fiber is slightly higher than E-glass, but lower than ceramic fiber, which makes it an economical middle-ground choice for high-temperature insulation.
What sizes of basalt fiber sleeving are available?
Standard braided inner diameters range from 4 mm to 80 mm. Custom sizes, wall thicknesses and flat-braided constructions are available on request. Send us the cable or pipe outer diameter, working temperature and quantity and we will recommend the closest standard size or quote a custom run.
Can the basalt fiber sleeving be silicone-coated?
Yes. Silicone-coated basalt fiber sleeving is available for applications that require additional protection against abrasion, moisture, oil or molten metal splash. Silicone coating also improves flexibility and reduces fiber dust. Fire-retardant and vermiculite-coated versions are available on request.
Is basalt fiber sleeving safe for handling?
Basalt fiber is a mineral fiber and, like glass or ceramic fiber, can cause skin and respiratory irritation when cut or handled without protection. Use appropriate dust extraction, gloves and a dust mask when cutting or installing the sleeving, and follow local health and safety regulations. Silicone-coated versions generate less dust during handling.
What is the MOQ and delivery time?
Standard MOQ is 100 kg, negotiable for trial orders and mixed containers. Production lead time is normally 15–25 days after order confirmation, and stock sizes can ship sooner.
Can I get a free sample before placing an order?
Yes. We provide free short sleeve samples for evaluation; the buyer covers the courier cost, which can be deducted from the first order. Send us your inner diameter, quantity and application details so we can send the most suitable sample.
Send your specification — get a quotation and a free sample Include inner diameter, quantity, working temperature, coating requirement and annual demand for the fastest response.
Technical review: This basalt fiber sleeving product page was reviewed by the Kaxite application engineering team.
Data sheet version: KXT BF700-2026-09. Specifications subject to change without notice.
Last reviewed: September 2026.
Data sheet version: KXT BF700-2026-09. Specifications subject to change without notice.
Last reviewed: September 2026.
Hot Tags: Basalt Fiber Sleeving, Basalt Sleeve, High Temperature Cable Sleeving, Braided Basalt Sleeve, Heat Resistant Sleeving, KXT BF700, Basalt Fiber Braided Sleeve, China, suppliers, manufacturers, factory
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No. 432 Zhenhai Middle Road, Luotuo Street, Zhenhai District, Ningbo City, Zhejiang China
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