EK-M05
Polyester-modified polysilazane resin series
Polyester-modified polysilazane resin series balancing polysilazane hardness with film flexibility; fast ambient set and >115° water contact angle.
FORM
Resin series
APPEARANCE
Colorless, transparent
CURING
Ambient / 140 · <0.5 / <0.2 h
Documents
TDS · SDS
The material
How this grade works and where it fits — exact parameters are defined in the TDS.
Polysilazane offers outstanding advantages such as high hardness, high-temperature resistance and resistance to yellowing; however, as an ultra-hard silazane it is relatively low in toughness and falls short in bend resistance and boiling-water resistance. In this product, polyester groups and hydroxyl groups are introduced onto the molecular chain of a voltage-resistant insulating polysilazane; through a bake cross-linking reaction, the bend resistance, boiling-water resistance, salt-spray resistance, abrasion resistance, light transmittance and aging resistance of the polysilazane are greatly improved, giving EK-M05 excellent overall physical and chemical performance.
After curing, the coating forms covalent bonds with the substrate; this chemical bonding greatly increases the mechanical strength of the coating.
Typical applications: (1) insulating, voltage-resistant protective coatings for new-energy lithium batteries and similar; (2) flexible insulated cables, enamelled wire and other insulation and voltage-resistance applications; (3) production of high-strength premium cement products, panels, pipes and other building materials; (4) heat-insulating reflective coatings, and insulating voltage-resistant primer-topcoats for special-purpose coil materials; (5) automotive and marine coatings, as well as building materials, molds, etc.; (6) bonding of glass-fiber-reinforced plastic, rigid plastics and concrete, electrical potting, etc.
Choose this series when flexibility and speed matter: polyester-modified films with fast ambient set (surface-dry <0.5 h) and >115° water contact angle, -30…250 °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
>65%
—
Viscosity
21–26 s
—
Max service temperature
-30 to 250 °C service · 350 °C peak
Depends on cure & film build
Curing conditions
Ambient / 140 · <0.5 / <0.2 h
Per application process
Recommended film thickness
40±5 µm
—
Shelf life
12 months (storage at 5–30 °C)
Storage conditions apply
Service temperature. Curing can be carried out either by baking at 140–160 °C or at ambient temperature. The service temperature is below 250 °C. Depending on the temperature resistance of the substrate, the temperature resistance of the coating varies accordingly; the coating withstands hot-cold cycling (note: the product supplied differs depending on the substrate).
Coating Basic Data
Coating appearance: Colorless, transparent — Visual
Coating components: One-component
Mixed density: 0.89–0.95 g/cm³ — Measured
Coating Film Properties
Condition in container: Uniform; no lumps or sediment — Visual
Mixed color: Colorless, transparent — Visual
Mixed viscosity: 21–26 s — GB-T 1723-1993
Adhesion: Grade 0 — GB-T 9286-1998
Boiling-water resistance: After 4 h in boiling water, the film shows no blistering, delamination or cracking. — GB-T11944-2002
Bend resistance: Bent 180°: no paint detachment and no cracking under the microscope — GB-T 6742-2007
Film hardness: ≥5H — GB-T 6739-2006
Neutral salt spray resistance: 30 d: no blistering, no cracking, no rust spots — GB-T 10125-2021
Artificial weathering resistance: 30 d: no rusting, no chalking, no cracking, slight discoloration — GB-T 1865-2009
Water contact angle: >115° — GB/T 26490-2011
Basic Application Parameters
Coating solids content (%): >65%
Theoretical coverage (m²/kg): 10–15
Dry film thickness (µm): 40±5
Working time (pot life) (h): <1
Diluent: Alkanes, esters, ethers, etc.
Flash point (°C): <22 (solvent flash point)
Volatility: Readily volatile
Curing temperature (°C): Ambient / 140
Curing time (h): <0.5 / <0.2
Maximum transient temperature resistance (°C): 350
Recommended service temperature (°C): -30 to 250
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, as well as some organic materials, plastics, etc. Note: The coating formulation differs depending on the substrate. 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 must be dry, cool and well ventilated, away from heat sources and open flames. Keep packaging containers tightly sealed and place them with care.
Maintain a storage temperature of 5–30 °C; the shelf life is 12 months.
Reseal opened containers of unused coating and store them tightly closed.
Prepared coating that is not 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 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-M05 application → Curing
Abrasive roughening. Before coating, sand or blast the substrate surface to remove rust, dust, dirt and other contaminants adhering to the workpiece surface. 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 give this step 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 preparation. This product is one-component; take the required amount and filter it through a 120-mesh screen before use.
Coating application. For laboratory spray application, a 1.0 mm nozzle spray gun gives better appearance and uniformity.
Curing. After spraying, with room-temperature curing the coating is surface-dry in more than 20 min and touch-dry in more than 1 hour; accelerated heat curing is also possible (medium-low-temperature curing at 140 °C for about 10 minutes).
Note: This product is a one-component product; once mixed, use the coating within 6 hours. During longer breaks in application, clean the application tools thoroughly to prevent them from setting up. Application in a single spray pass is recommended, with a dry film thickness not exceeding 50 µm; otherwise 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.