EK-S12B
Ammonia-based low-molecular silazane
Ammonia-based low-molecular silazane grade; properties and application data confirmed in TDS.
FORM
Liquid silazane
APPEARANCE
Colorless transparent liquid
CURING
250 °C · 1.5 h
Documents
TDS · SDS
The material
How this grade works and where it fits — exact parameters are defined in the TDS.
EK-S12B is a liquid low-molecular-weight polymer whose main chain is built of Si—N bonds. By ring-opening polymerization it can be used to prepare high-purity silazane precursors of the desired degree of polymerization, and it can be applied for weathering and self-cleaning protection in the photovoltaic and semiconductor industries. The reactivity of the Si—CH3 bond is limited, so heat curing is difficult when the product is used alone; it is therefore usually formulated together with organosilazanes containing reactive groups. The Si—N bond reacts with hydroxyl-containing substances, so the product can be used as an amine-type curing agent and can also modify hydroxyl-containing resins to improve their temperature and weathering resistance — for example phenolic, epoxy, alkyd and acrylic resins.
This grade introduces phenyl groups onto the hexamethyl base structure, improving the product's overall performance, including weathering resistance, mechanical properties and thermal stability.
Choose this grade as the phenyl-modified version of EK-S12: the same synthesis building block with improved solubility and compatibility.
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.
Synthesis building block — used in polymer and resin production rather than in end applications directly.
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
>96%
—
Viscosity
12 s (Tu-4 cup)
—
Max service temperature
-30 to 300 °C service · 600 °C peak
Depends on cure & film build
Curing conditions
250 °C · 1.5 h
Per application process
Recommended film thickness
8±5 µm
—
Shelf life
6 months (storage at 5–30 °C)
Storage conditions apply
Service temperature. Maximum withstand temperature 500 °C; suitable for long-term service at 300 °C. Coatings formulated with temperature-resistant nano fillers withstand direct scouring by flame or high-temperature gas flow. The coating's temperature resistance varies correspondingly with the temperature resistance of the substrate; the coating resists cold–heat cycling and thermal shock (note: the product supplied for different substrates will differ).
Coating Film Properties
Color and appearance: Colorless transparent liquid — GB-T 1721-79
Viscosity (Tu-4 flow cup): 12 s — GB-T 1723-1993
Quality specification: ≥96% — Q/YX 10-2023
Solids content ((120±2) °C): >96% — GB/T 1725-2007
Density (g/mL): 0.92±0.01 — GB/T 6750-2007
Relative molecular mass: 218–221 — GB/T 27843-2011
Hardness (pencil): ≥3H — GB/T 6739-2006
Adhesion: Grade 0 (cross-cut) — GB-T 9286-1998
Neutral salt spray resistance: >500 h — GB-T 10125-2021
Basic Application Parameters
Coating solids content (%): >96
Theoretical coverage (m²/kg): 15–20
Dry film thickness (µm): 8±5
Working time (pot life) (h): 24
Diluent: Alkanes, esters, ethers, etc.
Flash point (°C): <22 (solvent flash point)
Volatility: Low volatility
Curing temperature (°C): 250
Curing time (h): 1.5
Instantaneous maximum temperature resistance (°C): 600
Recommended service temperature (°C): -30 to 300
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
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 depending on the substrate; within a certain range it can be adjusted and matched to the substrate and its service conditions.
Storage, packaging & transport
Store in accordance with national regulations. The storage environment must be dry, cool and well ventilated, away from heat and ignition sources. Keep packaging containers tightly sealed and place them with care.
Maintain the storage temperature between 5 °C and 30 °C; the shelf life is 6 months.
If opened coating is not used up, the container must be resealed tightly with its lid for storage.
Prepared (mixed) coating that is not used up cannot be reclaimed; dispose of it in accordance with local regulations.
Product beyond its shelf life may be used only after testing confirms 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-S12B treatment → Curing
Abrasive roughening. Before coating, grind or blast the substrate surface to remove rust, dust, dirt and other deposits from the workpiece surface. Roughening has a significant effect on coating performance: optimum Sa2.5, minimum St3 grade free of mill scale (GB/T 30790.4-2014), so give this full attention.
Cleaning. Use a dedicated cleaner or degreaser to remove residual oil, dust and other contaminants from the roughened surface.
Substrate drying. Before coating, ensure the substrate surface is dry and clean.
Coating mixing. This product is one-component; take the required quantity 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. After curing, the coating is somewhat hydrophobic and oleophobic, so repeated coating passes are not recommended.
Curing. After spraying, allow 10 minutes for surface drying, then cure at 250 °C for 60 minutes.
Note: This is a one-component heat-curing product; once opened, use the coating within 24 hours. During longer breaks in application, clean the application tools thoroughly to prevent them from setting. Application in a single spray pass is recommended, with a dry film thickness not exceeding 15 µm; otherwise the coating film properties 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
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Fluorosilanes & Surface Modifiers
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Adhesives
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Additives
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Polycarbosilane
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SiC Fibers
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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.