EK-S02B
Additive-type flame retardant
Additive-type silazane flame retardant used alongside EK-S01 and EK-S02SC/RC systems.
FORM
Solvent-free liquid
APPEARANCE
Pale yellow to colorless transparent liquid
CURING
Ambient temperature · >24 h
Documents
TDS · SDS
The material
How this grade works and where it fits — exact parameters are defined in the TDS.
This product uses a silicon-based ceramic precursor — polysilazane (PSZ) — as the film-forming substance and is a solvent-free, room-temperature self-curing product. The principal curing reactions are hydrolysis of Si-NH-Si and in-situ polycondensation between Si-OH groups. At the same time, the Si-H and Si-NH-Si bonds react directly with -OH groups on the substrate surface, so the coating bonds to the substrate through chemical covalent bonds. After curing, the resin forms a three-dimensional, high-strength, highly dense crosslinked network structure that gives the material good physical and chemical properties; pencil hardness exceeds 6H with no yellowing. On this basis, phenyl functional groups are introduced, improving the high- and low-temperature stability, the insulating and mechanical properties of the product, and the weather and chemical resistance of the resin.
It is suitable for wear-resistant, weather-resistant, fire-protection and insulating coatings, outdoor hydrophobic self-cleaning anti-aging coatings, skin-friendly antibacterial main coats, and similar applications. The Si-N bond reacts readily with hydroxyl-containing substances, so the product can be used as an amine-type curing agent; it can also be used to modify hydroxyl-containing resins — such as phenolic, epoxy, alkyd and acrylic resins — to improve their temperature and weathering resistance.
Choose this grade as a solvent-free room-temperature-curing polysilazane base for flame-retardant duty: >1500 h salt spray, -30…400 °C service with 800 °C peaks.
Final fit is confirmed during technical review — send your substrate, operating environment and application process, and the team will confirm this grade or point you to a closer one.
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.
Used as a flame-retardant base within coating systems — application areas follow the host formulation. Ask the team for combination guidance.
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
>98%
—
Viscosity
TBC in TDS
—
Max service temperature
-30 to 400 °C service · 800 °C peak
Depends on cure & film build
Curing conditions
Ambient temperature · >24 h
Per application process
Recommended film thickness
20–50 µm
—
Shelf life
18 months (storage at 5–30 °C)
Storage conditions apply
Service temperature. Suitable for outdoor service at temperatures below 400 °C and for short-term high-temperature service at 500 °C, among other conditions. The temperature resistance of the coating varies according to the temperature resistance of the particular substrate; the coating resists hot–cold cycling and thermal shock (note: the corresponding product differs depending on 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): 0.96±0.05 — GB/T 6750-2007
Hardness (pencil): ≥6H — GB/T 6739-2006
Adhesion: Grade 0 (cross-cut) — GB-T 9286-1998
Neutral salt spray resistance: >1500 h — GB-T 10125-2021
Water contact angle: >100° — GB/T 26490-2011
Artificial weathering resistance: 120 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
Volatility: Solvent evaporates readily
Theoretical coverage (m²/kg): 8–12
Curing temperature (°C): Ambient temperature
Dry film thickness (µm): 20–50
Curing time (h): >24
Working time (pot life) (h): 4
Maximum instantaneous temperature resistance (°C): 800
Diluent: Aromatic hydrocarbons, esters, ethers, etc.
Recommended service temperature (°C): -30 to 400
Flash point (°C): >55 °C
Warehouse storage (°C): 0–30 °C
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
Carbon steel, stainless steel, cast iron, aluminum alloy, titanium alloy, high-temperature alloy steel, glass-ceramic panel, ceramic, cement and other materials are all suitable. Note: the coating formulation differs for different substrates; within a certain range, it can be adjusted to match the substrate and its service conditions.
Storage, packaging & transport
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 must be maintained between 5 °C and 30 °C; the shelf life is 18 months.
Coating that has been opened but not used up must be resealed with the container lid and stored sealed.
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.
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.
Standard process: Surface cleaning → Abrasive roughening → Cleaning and blow-off → EK-S02B application → Curing
Abrasive roughening. Before coating, sand or blast the substrate surface to remove rust, dust, dirt and other contamination adhering to the surface of the workpiece. Roughening has a considerable influence on coating performance — optimum Sa2.5, minimum St3 with no mill scale (GB/T 30790.4-2014) — so pay full attention to this step.
Cleaning. Use a dedicated cleaning agent or degreaser to remove oil, dust and other residues remaining on the sanded surface.
Substrate drying. Before coating, ensure that the substrate surface is dry and clean.
Coating mixing. This product is one-component; take the required amount of product and filter it through a 120-mesh screen before use.
Coating application. For laboratory spray application, a spray gun with a 1.0 nozzle orifice gives better appearance and uniformity. The cured coating is somewhat hydrophobic and oleophobic, so recoating is not recommended.
Curing. After spraying, room-temperature curing: surface-dry in 2 hours, touch-dry in more than 3 hours, 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 application intervals, application tools should be cleaned thoroughly to prevent them from setting solid. Application in a single spray pass is recommended, 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.