Tunnel fire protectioncoatings
KF-TF100 Tunnel Fireproof Coating
KF-TF100 tunnel fireproof coating is based on cement and expanded vermiculite/perlite, with fireproof fibers and additives. The coating thickness is 15-25mm, sprayed on the surface of tunnel concrete lining. Tested according to the tunnel HC temperature rise curve, the fire resistance limit is greater than 2 hours. A1-class non-combustible material. Widely used for passive fire protection of highway/railway/subway/urban tunnels and underground utility tunnels.
ProductsOverview
Tunnel fireproof coating is a special fireproof coating developed by KeXin New Material. Designed according to GB 14907 and ISO 834 standards, the coating expands in a fire to form a dense carbonized layer, effectively blocking heat conduction and buying valuable time for personnel evacuation and fire rescue.
The product has passed national fire protection 3C certification and UL international certification, with fire resistance limit of 1-3 hours. Suitable for steel structures, concrete structures, cables and other buildings and industrial facilities requiring passive fire protection.
Why choose tunnel fireproof coating?
CoreAdvantages
HC Tunnel Fire Curve · 2-Hour Fire Resistance
Tested according to the RABT-ZTV tunnel fire temperature rise curve (reaching 1200 degrees in 120 minutes). The fire resistance limit of a 25mm thick coating is greater than 2 hours. In extreme tunnel fire scenarios (tanker truck/truck fires), it protects the concrete lining from spalling and collapse, ensuring the safety of personnel escape and rescue routes.
Cement-Based Non-Combustible · Durable and Environmentally Friendly
Cement and expanded mineral aggregate system, A1-class non-combustible material. Does not produce toxic smoke or molten drips at high temperatures. The coating is resistant to moisture/CO2 carbonation/vehicle exhaust corrosion in tunnels. Designed service life greater than 30 years, matching the tunnel structure's lifespan.
Mechanical Spraying · Efficient Construction
Dedicated screw pump wet spraying machine can spray 500-800 square meters per machine shift. It integrates reasonably with tunnel waterproofing layer and secondary lining construction procedures. After tunnel breakthrough, sectional spraying can be carried out with controllable construction period. The adhesion between coating and concrete is greater than 0.3MPa.
Professional coating technology support services
Kexin has an experienced coating R&D and application team providing full-process support — from substrate analysis, coating selection and process-parameter optimization to on-site application guidance.
Eco-compliant green manufacturing system
All products are certified against the ROHS/REACH environmental regulations and their VOC content meets national environmental standards. Environmental performance test reports issued by authoritative third-party laboratories such as SGS and CTI are provided.
Complete quality control and batch traceability
A full-process quality control system, from incoming raw materials to dispatch of finished goods. Every batch passes rigorous physico-chemical testing and simulated coating trials. Each shipment is released with a batch test report and a product warranty.
TechnicalSpecifications
Basic parameters
Performance
The technical parameters above are taken from test data of the Kexin New Materials laboratory (ISO 17025 accredited); actual values may differ slightly depending on application conditions and substrate. Please contact technical support to obtain a current COA test report.
Frequently AskedFAQ
ApplicationProcess
Surface preparation
Clean substrates thoroughly of oil and rust. Blast steel to Sa2.5. Pre-treat per product spec to keep the substrate clean. Ambient 5-40°C, relative humidity<85%。
Primer / pre-treatment
Select the matching primer or pre-treatment per substrate and system. Mix strictly at the stated ratio and control DFT. Proceed after the primer dries; pre-stripe critical areas.
Main-coat application
Apply the main coat per the process spec, strictly controlling DFT, temperature/humidity and flash-off to keep the film uniform without sagging or pinholes.
Curing process
Cure fully by stoving or by ambient air drying as the product requires. Keep oven temperature uniform within ±5°C and ramp up gradually to avoid coating defects. For ambient-curing grades, ensure adequate ventilation and suitable humidity.
Inspection & acceptance
Inspect all parameters: dry film thickness, adhesion, gloss, colour difference and chemical resistance. Full performance testing is carried out against the relevant standards. Only after everything passes are the test report and warranty issued, and the goods are packed and shipped in dust-free conditions.
ApplicationsCases
Highway tunnel fireproof coating
Highway tunnel concrete lining sprayed with HC fire protection coating, 2-hour fire resistance
Railway tunnel fireproof coating
Sprayed fire protection for railway tunnels in train fire scenarios
Metro tunnel fireproof coating
Sprayed passive fire protection for metro running tunnels
Urban tunnel fireproof coating
Sprayed fire protection for urban underpass tunnels at transport hubs
Subsea tunnel fireproof coating
Sprayed fire protection for immersed tube tunnels under rivers and seabeds
Mountain tunnel fireproof coating
Sprayed fire protection for mountain tunnel primary lining and secondary lining
Power tunnel fireproof coating
Sprayed fire protection for power cable tunnels
Utility tunnel fireproof coating
Sprayed multi-compartment fire protection for urban utility tunnels
Tunnel cross-passage fireproof coating
Sprayed fire protection for tunnel cross-passage and escape corridors
Mine roadway fireproof coating
Sprayed fire protection for mine and metal mining roadways
Tunnel portal fireproof coating
Sprayed fire protection for tunnel portals and canopies
Tunnel operation and maintenance fireproof coating
Repair and strengthening spray maintenance for operating tunnel fireproof coatings
Related coatingsRecommended
Steel structure fire-retardant coating
Intumescent · 3h fire resistance · 3C certified
Learn more→Outdoor thick-film fire protection of steel structures
Thick-film steel structure · Outdoor fireproofing · Durable
Learn more→
Tunnel fire-retardant coating
Tunnel-specific · HC standard · 2h fire resistance
Learn more→
Cable fire-retardant coating
Cable fireproofing · V0 grade · Flame retardant and arc resistant
Learn more→Tunnel fireproof coating·Factory direct supply
KEXIN tunnel fireproof coating supplied directly from the source factory. Free sample testing, on-site guidance from technical engineers, and ISO-certified quality assurance.
Related articles & news
Further reading: technical articles and industry news from Kexin New Materials