EK-S02SC
Organic polysilazane binder for coating systems — slow cure
Solvent-free organic polysilazane binder, room-temperature self-curing (slow-cure grade). Pencil hardness over 4H with no yellowing; covalent bonding to the substrate. Also applied as an additive-type flame retardant and fiber sizing agent.
FORM
Solvent-free liquid binder (RC / SC)
APPEARANCE
Per grade — see technical data
CURING
Room-temperature self-curing (slow-cure grade); pot life 4 h
Documents
TDS · SDS
Additives (flame retardant · sizing)
The material
How this grade works and where it fits — exact parameters are defined in the TDS.
EK-S02RC: This product is based on a rapidly room-temperature-curing poly(silazane–siloxane) as the film-forming substance and is a solvent-free, room-temperature self-curing product. The principal reactions involved in curing are the hydrolysis and oxidation of Si-NH-Si. Si-NH-Si bonds also react readily with -OH groups on the substrate surface, which provides excellent adhesion to the substrate. Adding a suitable catalyst to the resin further promotes the reaction between Si-H and Si-NH-Si; after curing, the resin forms a three-dimensional cross-linked network that gives the material good mechanical properties.
EK-S02SC: This product uses polysilazane as the film-forming substance and is a solvent-free, room-temperature self-curing product. The principal reactions involved in curing are the hydrolysis and oxidation of Si-NH-Si. At the same time, Si-NH-Si bonds react readily with -OH groups on the substrate surface, which provides good bonding to the substrate. Adding a suitable catalyst to the resin further promotes the reaction of Si-H with Si-NH-Si; after curing, the resin forms a three-dimensional cross-linked structure, giving the material good mechanical properties. Pencil hardness exceeds 4H with no yellowing. The product is suitable for voltage-withstanding electrical-insulation coatings, wear-resistant fire-protection coatings, hydrophobic self-cleaning anti-aging coatings for outdoor use, skin-friendly antibacterial topcoats, and similar applications. After curing it forms covalent bonds with the substrate, and this chemical bonding greatly increases the mechanical strength of the coating.
Choose EK-S02SC for the standard slow-cure schedule and maximum working comfort; choose EK-S02RC when a faster room-temperature cure and higher hardness (≥5H) are required.
Suitable for
Industrial applications within the TDS parameters
Metal, glass, ceramic and stone substrates — per grade
Professional application and curing processes
Not intended for
Consumer or DIY use — industrial B2B supply only
Conditions outside the parameters defined in the TDS
Food-contact or medical use unless explicitly confirmed
Applications
Recommended application areas for this grade, based on its TDS. Application fit is confirmed during technical review.
Recommended applications for this grade:
Technical data
Key values from this grade's TDS. The complete measured data set follows below; the official document is available on request.
PROPERTY
TYPICAL VALUE
NOTES
Solid content
>90%
—
Viscosity
Per grade — see full data below
—
Max service temperature
−30…400 °C service; short-term up to 600 °C
Depends on cure & film build
Curing conditions
Room-temperature self-curing (slow-cure grade); pot life 4 h
Per application process
Recommended film thickness
20–50 µm dry film (single pass)
—
Shelf life
Per grade — see full data below
Storage conditions apply
— EK-S02RC —
Service temperature. Suitable for outdoor service at temperatures below 400 °C and for short-term high-temperature service at 600 °C. Depending on the temperature resistance of the substrate, the temperature resistance of the coating varies accordingly; resistant to hot–cold cycling and thermal shock (note: the corresponding product differs with the substrate).
Coating Film Properties
Color and appearance: Pale-yellow to colorless transparent liquid — GB-T 1721-79
Solids content ((120±2) °C): >98% — GB/T 1725-2007
Density (g/mL): 0.88±0.1 — GB/T 6750-2007
Hardness (pencil): ≥5H — GB/T 6739-2006
Adhesion: Grade 0 — GB-T 9286-1998
Neutral salt spray resistance: >500 h — GB-T 10125-2021
Water contact angle: >100° — GB/T 26490-2011
Artificial weathering resistance: 30 d: no rusting, no chalking, no cracking, no discoloration — GB-T 1865-2009
Dielectric strength (V/mm): ≥10⁵ — ASTM-D149
Resistance (Ωm): ≥10¹² — GB/T 35856-2018
Basic Application Parameters
Coating solids content (%): >90
Theoretical coverage (m²/kg): 6–8
Dry film thickness (µm): 20–70
Working time (pot life) (h): 4
Thinner: Aromatic hydrocarbons, esters, ethers, etc.
Flash point (°C): <22 (solvent flash point)
Volatility: Readily volatile solvent
Curing temperature (°C): Ambient (room temperature)
Curing time (h): >18
Maximum instantaneous temperature resistance (°C): 500
Recommended service temperature (°C): -30 to 350
Storage (°C): 0-30
— EK-S02SC —
Service temperature. Suitable for outdoor service at temperatures below 400 °C and for short-term high-temperature service at 600 °C. Depending on the temperature resistance of the substrate, the temperature resistance of the coating varies accordingly; the coating withstands hot-cold cycling and thermal shock (note: the product supplied differs according to the substrate).
Coating Film Properties
Color and appearance: Pale yellow to colorless transparent liquid — GB-T 1721-79
Solids content ((120±2) °C): >90% — GB/T 1725-2007
Density (g/mL): 0.88±0.1 — GB/T 6750-2007
Hardness (pencil): ≥4H — GB/T 6739-2006
Adhesion: Grade 0 (cross-cut) — GB-T 9286-1998
Neutral salt spray resistance: >500 h — GB-T 10125-2021
Water contact angle: >100° — GB/T 26490-2011
Artificial weathering resistance: 30 d: no rusting, no chalking, no cracking, no discoloration — GB-T 1865-2009
Dielectric strength (V/mm): ≥10⁵ — ASTM-D149
Resistance (Ωm): ≥10¹² — GB/T 35856-2018
Basic Application Parameters
Coating solids content (%): >90
Theoretical coverage (m²/kg): 6–8
Dry film thickness (µm): 20–50
Working time (pot life) (h): 4
Diluent: Aromatics, esters, ethers, etc.
Flash point (°C): <22 (solvent flash point)
Volatility: Solvent evaporates readily
Curing temperature (°C): Ambient
Curing time (h): >24
Instantaneous maximum temperature resistance (°C): 600
Recommended service temperature (°C): -30 to 400
Warehouse storage (°C): 0–30
Data above is taken from the manufacturer’s TDS. Request the official document via the documents section below.
Substrates & storage
Compatibility and handling essentials — confirmed per grade in the TDS and SDS.
Suitable substrates
Steel and stainless steel
Aluminium and other metals
Glass and ceramics
Stone and mineral surfaces
EK-S02RC: Carbon steel, stainless steel, cast iron, aluminum alloys, titanium alloys, high-temperature alloy steels, glass-ceramic panels, ceramics, cement and other such materials. Note: the coating formulation differs for different substrates; within a certain range, it can be adjusted to match the substrate and its service conditions.
EK-S02SC: Carbon steel, stainless steel, cast iron, aluminum alloys, titanium alloys, high-temperature alloy steels, glass-ceramic panels, ceramics, cement and similar materials are all suitable. Note: the coating formulation differs according to the substrate; within a certain range, it can be adjusted and matched to the specific substrate and its service conditions.
Storage, packaging & transport
EK-S02RC
Store in accordance with national regulations, in a dry, cool, well-ventilated environment away from heat and ignition sources. Packaging containers must be kept tightly sealed and placed with care.
Storage temperature must be maintained between 5 °C and 30 °C; the shelf life is 12 months.
Opened, partially used coating must be stored with the lid tightly resealed.
Prepared (mixed) coating that has not been used up cannot be reclaimed; dispose of it in accordance with local regulations.
Product past its shelf life may be used only after testing confirms that it still meets specification.
EK-S02SC
Store in accordance with national regulations. The storage environment should be dry, cool and well ventilated, away from heat and ignition sources. Packaging containers must be kept tightly sealed and placed with care.
The storage temperature should be maintained between 5 °C and 30 °C; the shelf life is 6 months.
Opened, partially used coating must be stored with the container lid tightly resealed.
Prepared coating that has not been used up cannot be reclaimed; dispose of it in accordance with local regulations.
Product past its shelf life may be used only after testing confirms it conforms to specification.
Packaging
1 kg / 5 kg / 25 kg (grade-dependent)
Transport classification
Per SDS
Application process
General guidance — exact parameters are provided in the TDS and Application Guide.
01
Surface preparation
Clean, degrease and prepare the substrate.
02
Application
Spray, dip or wipe depending on grade.
03
Curing
Cure per the TDS conditions.
04
Quality control
Verify film build and adhesion.
EK-S02RC
Standard process: Surface cleaning → Abrasive roughening → Cleaning and blow-off → EK-S02RC application → Curing
Abrasive roughening. Before coating, sand or blast the substrate surface to remove rust, dust, dirt and other contamination adhering to the workpiece surface. Roughening has a major influence on coating performance: Sa2.5 is optimal and St3 with no mill scale is the minimum (GB/T 30790.4-2014), so pay close attention to this step.
Cleaning. Use a dedicated cleaner or degreaser to remove oil, dust and other residues remaining on the roughened surface.
Substrate drying. Before coating, ensure that the substrate surface is dry and clean.
Coating mixing. The product is one-component; take the required amount and filter it through a 120-mesh screen before use.
Coating application. For laboratory spraying, a spray gun with a 1.0 orifice gives better appearance and uniformity. The cured coating is somewhat hydrophobic and oleophobic, so repeat coating (recoating) is not recommended.
Curing. After spraying, cure at room temperature: surface-dry after 30 minutes, touch-dry after more than 2 hours, and through-dry after more than 18 hours.
Note: This product is a one-component self-curing product; once the container is opened, use the coating within 4 hours. For longer application sessions, clean application tools thoroughly to prevent them from curing solid. Application in a single spray pass is recommended, with a dry film thickness not exceeding 70 µm; otherwise coating film performance will decline.
EK-S02SC
Standard process: Surface cleaning → abrasive roughening → cleaning and blowing off → EK-S02 treatment → curing
Abrasive roughening. Before coating, sand or blast the substrate surface to remove rust, dust, dirt and other contaminants adhering to the surface of the workpiece. Surface roughening has a considerable influence on coating performance: Sa2.5 is optimal, and the minimum is St3 with no mill scale (GB/T 30790.4-2014), so pay close attention to this step.
Cleaning. Use a dedicated cleaning agent or degreaser to remove oil, dust and other residues remaining on the abrasively roughened surface.
Substrate drying. Before coating, ensure that the substrate surface is dry and clean.
Coating preparation. The product is one-component; take the required quantity and filter it through a 120-mesh screen before use.
Coating application. For laboratory spraying, a spray gun with a 1.0 orifice gives better appearance and uniformity. After curing, the coating is somewhat hydrophobic and oleophobic, so recoating (applying repeat coats) is not recommended.
Curing. After spraying, for room-temperature curing the coating should be surface-dry in 2 hours, finger-touch dry in more than 3 hours, and through-dry in more than 24 hours.
Note: This product is a one-component self-curing product; once the container has been opened, use the coating within 4 hours. During longer breaks in application, clean the application tools thoroughly to prevent them from setting solid. It is recommended to complete spraying in a single pass, with a dry film thickness not exceeding 50 µm; otherwise the coating film performance will decline.
More grades
Browse the full catalogue by category, or send your requirements — we will recommend a grade for your case.
Organic Polysilazane Resins
→
Inorganic Polysilazane / Ceramic Precursors
→
Modified Polysilazane Coatings
→
Ready-to-use Ceramic Coatings
→
High-temperature Ceramic Coatings
→
Electrical Insulation Coatings
→
Fluorosilanes & Surface Modifiers
→
Adhesives
→
Additives
→
Polycarbosilane
→
SiC Fibers
→
Ordering & logistics
Common questions from procurement and engineering teams.
What packaging formats are available?
Standard packaging is 1 kg, 5 kg and 25 kg containers, grade-dependent. Other formats, minimum order quantity, lead times, shipping terms and stock availability are confirmed on request.
What is the minimum order quantity for this product?
MOQ depends on the packaging format — confirmed by our team for your grade and volume.
What happens after I send an inquiry?
Our technical team reviews your requirement and responds with a recommendation, the relevant documents and next steps.
How do I get a quotation?
Include your estimated volume and application in the inquiry — a quotation follows the technical review.
How is the product shipped?
Packaging, transport classification and shipping details are provided per SDS — request packaging and shipping information with your inquiry.