Organopolysilazane resins are solvent-free, room-temperature curing binders built on a Si-N backbone. Unlike silicone (Si-O) resins, they cure through moisture-triggered Si-NH-Si reactions and bond covalently to substrate hydroxyls, forming thin glass-like films with 6H–7H hardness, electrical insulation and weather resistance — the base chemistry for high-performance protective coatings.
The SILZ-150 series covers the practical range a formulator needs: SILZ-150 for slow cure and a long working window, SILZ-150K for rapid cure and fast production takt, and SILZ-150U as the formulation-grade variant. All three share the same core chemistry, so systems developed on one grade transfer predictably to another.
| Grade | Product | Solid Content (120 ± 2°C) | Pencil Hardness | Neutral Salt Spray Resistance | Dielectric Strength | Curing Temperature | Recommended Operating Temperature | Recommended Service Temperature |
|---|---|---|---|---|---|---|---|---|
| SILZ-150 | Room-Temperature Curing Polysilazane Resin (Slow Cure) | >97% | ≥6H | >500 h | ≥10⁵ V/mm | Room temperature | -30 to 350 °C | — |
| SILZ-150K | Rapid-Cure Room-Temperature Polysilazane Resin | >98% | ≥6H | >500 h | ≥10⁵ V/mm | Room temperature (rapid cure) | — | -30 to 350 °C |
| SILZ-150U | High-Hardness Polysilazane Resin (Formulation Grade) | >98% | ≥7H | >500 h | ≥10⁵ V/mm | Room temperature | — | -30 to 400 °C |
Comparison values from each product's TDS; “—” = full datasheet on request. Grades without a link are being migrated to the new site.
SILZ-150 (slow cure) gives roughly a 4-hour working window for larger parts and manual application; SILZ-150K (rapid cure) suits automated lines where takt time matters more than open time.
For a neat clear-coat, choose by hardness and cure profile. For resin modification or curing-agent use, SILZ-150U — the formulation grade — is the usual starting point.
SILZ-150 and SILZ-150K carry a public CAS registry number (shown on their product pages) with TDS, SDS and batch COA available; confirm registration coverage for your market with our team.
The series serves continuously to about 350 °C with short excursions to 500 °C. If your duty cycle runs hotter, step up to our high-temperature ceramic coatings instead.
Electrical Insulation & Electronics ProtectionTransparent, Hard & Easy-Clean Surface ProtectionResin, Rubber & Composite Modification
Choose by process: SILZ-150 for slow cure and a long application window, SILZ-150K for rapid cure on fast production lines, SILZ-150U when the resin is a formulation ingredient rather than a finished coating. Send us your application method and takt time and we will confirm the grade.
Yes. Curing is driven by ambient moisture reacting with the Si-NH-Si backbone: surface-dry in about 30 minutes and full cure in under a day at room temperature. Heat is optional to accelerate, never required.
Yes — small pails from 1 kg and evaluation samples are available with TDS and SDS, and a COA accompanies every shipment. Tell us your substrate and target film so we can recommend starting parameters along with the sample.
Send us your substrate, application method and service conditions — our technical team replies within 1 business day.
