EK-S11
Low-molecular methylhydrogen polysilazane
Low-molecular methylhydrogen polysilazane (molecular weight below 500) — typically used in composite materials, impregnation and thin films.
FORM
Liquid resin
APPEARANCE
Pale yellow to colorless transparent liquid
CURING
180–250 °C · 1 h
Documents
TDS · SDS
Additives (flame retardant)
The material
How this grade works and where it fits — exact parameters are defined in the TDS.
EK-S11 methylhydrogen polysilazane is a polymer whose main chain is built of Si—N bonds. Owing to its distinctive structure, it converts under high-temperature conditions into SiCNO, SiCN or silicon dioxide ceramics, making it an important precursor for the preparation of Si—C—N ceramics. The Si—H bond provides hydrosilylation-active sites and can be used to modify resins containing unsaturated olefins; the Si—N and Si—H bonds react readily 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.
Choose this grade for composites, impregnation and thin films: molecular weight below 500 gives penetration and wetting; bake-cured at 180–250 °C, -30…400 °C service.
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.
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
>95%
—
Viscosity
11 s (Tu-4 cup)
—
Max service temperature
-30 to 400 °C service · 800 °C peak
Depends on cure & film build
Curing conditions
180–250 °C · 1 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 800 °C; suitable for long-term service at 400 °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: Pale yellow to colorless transparent liquid — GB-T 1721-79
Viscosity (Tu-4 flow cup): 11 s — GB-T 1723-1993
Quality specification: ≥95% — Q/YX 10-2023
Solids content ((120±2) °C): >95% — GB/T 1725-2007
Density (g/mL): 0.81±0.01 — GB/T 6750-2007
Relative molecular mass: 177–591 — GB/T 27843-2011
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
Basic Application Parameters
Coating solids content (%): >95
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): 180–250
Curing time (h): 1
Instantaneous maximum temperature resistance (°C): 800
Recommended service temperature (°C): -30 to 400
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-S11 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 180 °C for 60 minutes (for coatings used below 400 °C) or at 250 °C for 60 minutes (for coatings used above 400 °C).
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
→
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.