HT-CAF is a hot-pressed compressed asbestos fiber (CAF) jointing sheet designed to deliver a reliable, long-lasting seal in high-temperature industrial systems. Engineered from long-fiber chrysotile asbestos and heat-resistant elastomeric binders, this asbestos gasket sheet maintains excellent torque retention and sealability under thermal cycling — making it a preferred choice for steam pipelines, boilers, heat exchangers, and process vessels operating at temperatures up to 550°C.
Whether you need standard sheet dimensions for in-house gasket cutting or custom die-cut gaskets produced to your DXF/CAD drawings, our HT-CAF range comes in plain, graphite-coated, and wire-inserted finishes to match your exact installation requirements.
Regulatory Notice – Please Read Before Ordering
Asbestos products are strictly regulated or completely banned in many countries (including the EU since 2005). It is the buyer’s responsibility to confirm the legal status of asbestos gasket materials in their destination market before procurement. Safe handling and appropriate PPE are mandatory during installation.
Need a compliant alternative? → View our Non-Asbestos High-Temperature Gasket Sheets (aramid/NBR, flexible graphite, ceramic) for equivalent performance in restricted markets.
Quick Technical Snapshot
| Property | Typical Value |
| Material | Chrysotile asbestos + heat-resistant binder (SBR/NBR or specialized) |
| Density | 1.6 – 2.2 g/cm³ (grade dependent) |
| Temperature Range | Up to 360°C – 550°C (grade-specific; verify datasheet) |
| Standard Thicknesses | 0.5, 0.75, 1.0, 1.5, 2.0, 3.0 mm (made-to-order: 0.3 – 6.0 mm) |
| Sheet Sizes | 1270×1270 mm, 1500×1500 mm, up to 1500×4500 mm |
| Finishes | Plain, graphite-coated, wire-inserted, anti-stick treated |
| Service Media | Saturated & superheated steam, hot water, oils, many hydrocarbons* |
Chemical compatibility must be confirmed for strong oxidizers and aggressive acids.
Typical Applications – Where HT-CAF Delivers Results
This high-temperature asbestos jointing sheet is widely used in power generation, petrochemical plants, and industrial maintenance for:
Steam pipelines and boiler flanges (including handhole and manhole gaskets)
Heat exchanger covers and tube sheets
Valve bodies, pump casings, and compressor flanges
High-temperature process vessels and autoclaves
OEM spare gasket kits and maintenance replacement programs
Performance & Operating Limits
HT-CAF is rated for continuous service at elevated temperatures where many non-asbestos materials fail. However, maximum temperature and pressure values are application-dependent and must not be assumed concurrently. A higher operating temperature will reduce the allowable pressure, and vice versa. Always request the grade-specific datasheet for your design conditions.
Key performance advantages:
Predictable creep behaviour — retains bolt load after thermal cycles
Excellent compressibility and recovery — compensates for flange irregularities
Reliable torque retention — fewer re-torque intervals on critical joints
Good die-cut yield — tight nesting for large OEM production runs
For critical steam or boiler services, our engineers can provide flange/bolt calculations and recommended bolt-up torque values on request.
Comparison: HT Asbestos CAF vs. Common Gasket Alternatives
Choosing the right high-temperature gasket depends on temperature, media, and your local regulatory environment. Use this table to quickly identify the best material for your application.
| Property | HT Asbestos CAF | Flexible Graphite | Non-Asbestos Compressed (Aramid/NBR) | Ceramic/Mica Millboard |
| Max continuous temp | 360–550°C (grade-dep.) | Up to ~550°C (oxidation limit) | 400–450°C | 800–1000°C |
| Chemical resistance | Moderate; excellent for steam/oils | Excellent for many chemicals | Good broad resistance | Excellent at extreme temps |
| Compressibility / recovery | Good | Moderate | Good to very good | Low |
| Die-cut yield | Excellent | Good | Excellent | Lower |
| Regulatory status | Restricted/banned in many regions | Widely accepted | Widely accepted | Widely accepted |
| Best when… | Traditional steam/boiler repair where permitted; cost-effective large-scale OEM runs | High-temperature aggressive chemical service; oxidizing environments | General replacement for asbestos in restricted markets | Furnace, firebox, and extreme high-temperature static joints |
Still not sure? Contact our technical team for a free material recommendation based on your operating conditions, flange type, and country regulations.
Product Specifications & Common Stock SKUs
Thicknesses available from stock: 0.5 mm, 0.75 mm, 1.0 mm, 1.5 mm, 2.0 mm, 3.0 mm.
Made-to-order thicknesses from 0.3 mm up to 6.0 mm available on request.
Standard sheet sizes:
1270 × 1270 mm
1500 × 1500 mm
Large format: up to 1500 × 4500 mm
Example Stock SKUs:
| SKU | Thickness | Sheet Size | Availability |
| HTCAF-050-1270 | 0.5 mm | 1270 × 1270 mm | Stock |
| HTCAF-100-1500 | 1.0 mm | 1500 × 1500 mm | Stock |
| HTCAF-150-1500 | 1.5 mm | 1500 × 1500 mm | Stock |
| CUSTOM-DIE | As per drawing | Die-cut from your DXF/CAD | Made-to-order |
Packing: Interleaved, film-wrapped on fumigated plywood pallets; wooden crates for long sea freight to prevent moisture ingress.
Custom Manufacturing & Value-Added Services
We don’t just supply sheets — we are a full-service gasket partner.
Die-cut & CNC gaskets from your DXF/CAD drawings (tooling charges may apply; amortized on repeat orders)
Custom finishes: Graphite coating, anti-stick treatment, wire mesh insertion
Private labeling with batch traceability and serial LOT numbers
Free sample program — test our material before you commit
Technical support: Installation guidance, bolt torque recommendations, and on-site training coordination
Why Engineers & Buyers Choose HT-CAF From Us
Consistent quality — every batch undergoes dimensional and density checks
Full documentation — MSDS, composition certificates, and batch test reports available
Export ready — FOB/CIF/EXW terms; we handle commercial invoice, packing list, COO, and MSDS for customs clearance
Fast turnaround — stock orders shipped within 7–15 business days; custom orders 2–5 weeks
Flexible MOQ — typically 50–100 sheets for stock; 500–1,000 pieces for new die-cut setups (contact us for trial orders)
Frequently Asked Questions
What is a CAF gasket sheet?
CAF stands for Compressed Asbestos Fiber. It is a jointing sheet made by compressing long chrysotile asbestos fibers with a heat-resistant binder under heat and pressure. The result is a dense, high-strength sheet material widely used for high-temperature industrial gaskets.
What is the maximum temperature for HT-CAF asbestos gasket sheet?
Depending on the grade and binder system, HT-CAF can typically be used at 360°C to 550°C. For superheated steam applications, always check the specific grade datasheet, as the pressure-temperature relationship is not linear.
Can HT-CAF be used for superheated steam?
Yes, HT-CAF is frequently used on saturated and superheated steam services. Proper bolt load calculations and material grade selection are essential; contact us with your operating parameters for a specific recommendation.
How is asbestos gasket sheet installed safely?
Installation should follow your site safety protocol for asbestos materials. Minimum PPE includes a respirator with P3 filter, protective clothing, and wet methods to suppress dust. Many customers now pre-cut gaskets in a controlled environment and supply them ready to install, reducing on-site handling risks.
Is asbestos gasket sheet legal in my country?
Regulations vary significantly. The EU banned asbestos in 2005, while other countries maintain restricted use in specific industrial applications. The U.S. EPA has also issued updated rules. You must verify your country’s current regulations before ordering. If you are in a restricted market, please explore our non-asbestos gasket alternatives.
What is the difference between CAF and non-asbestos gasket sheets?
The primary difference is fiber type: CAF uses chrysotile asbestos, offering proven high-temperature performance and excellent torque retention at a lower cost. Non-asbestos sheets use aramid, carbon, or synthetic fibers with NBR binders — they are widely accepted globally and avoid regulatory concerns, but may have slightly lower maximum temperature limits (typically 400–450°C). See the comparison table above for details.
What are your MOQ and lead times?
Stock sheet MOQ is usually 50–100 sheets per size. Custom die-cut orders vary, often starting at 500–1,000 pieces for a new die. Stock ships in 7–15 business days; custom orders take 2–5 weeks. Rush options are available — please enquire.
Do you ship internationally?
Yes, we ship worldwide under FOB, CIF, or EXW terms. Full export documentation (commercial invoice, packing list, Certificate of Origin, MSDS) is provided. We strongly advise you to check destination import restrictions for asbestos products before placing your order.
Ready to Get a Quote or Test a Sample?
Whether you need standard sheets for stock or a custom die-cut production run, our team is ready to support your project.
Free sample evaluation for qualified buyers
DXF/CAD-based gasket quoting within 24 hours
Full batch documentation for your compliance records
Need technical selection help? Read our Gasket Material Selection Guide.
