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English Views: 1254 Author: Site Editor Publish Time: 2026-01-07 Origin: Site
Silicone coated fiberglass fabric is widely used in industries that require heat resistance, fire protection, flexibility, and durability.
Among different types, semi-cured silicone coated fiberglass fabric is a less familiar but extremely important material—especially for manufacturers who need secondary processing or on-site curing.
In this article, we explain what semi-cured silicone coated fiberglass fabric is, how it differs from fully cured material, and where it is commonly used.
Silicone coated fiberglass fabric is made by coating woven fiberglass cloth with silicone rubber on one or both sides.
This structure combines the advantages of both materials:
Fiberglass fabric → high tensile strength, dimensional stability, fire resistance
Silicone rubber coating → heat resistance, flexibility, waterproofing, insulation
It is commonly used for thermal insulation, fire protection, expansion joints, protective covers, and industrial sealing.
“Semi-cured” (also called B-stage curing) means the silicone coating is partially vulcanized, not fully cured.
Uncured – sticky, unstable, not usable
Semi-cured (half-cured) – solid but still reactive
Fully cured – completely cross-linked, final properties fixed
In semi-cured silicone coated fiberglass fabric:
The surface is dry and non-sticky
The silicone still contains active curing sites
The material can be further cured during secondary processing
Because the silicone is not fully cured, the fabric:
Bonds easily to other materials
Can be laminated, molded, or hot-pressed
Achieves strong adhesion after final curing
Manufacturers can:
Adjust curing temperature and time
Control final hardness, flexibility, and bonding strength
Match specific product requirements
Even in semi-cured state, it provides:
Continuous heat resistance up to 200–250°C
Short-term fire and flame protection
Low smoke and low toxicity options available
Fiberglass substrate ensures:
High tensile strength
Tear resistance
Dimensional stability under heat
| Feature | Semi-Cured | Fully Cured |
|---|---|---|
| Silicone state | Partially vulcanized | Fully vulcanized |
| Secondary processing | Excellent | Limited |
| Adhesion in lamination | Very strong | Moderate |
| Flexibility adjustment | Possible | Fixed |
| Ready-to-use | Needs final curing | Yes |
In short:
Choose semi-cured for manufacturing & composite processes
Choose fully cured for direct installation and end-use products
Removable insulation jackets
Heat shields
Flexible expansion joints
Fire curtains
Fire blankets
Fire-resistant covers
Multi-layer insulation systems
Silicone-rubber composite sheets
Custom molded fireproof parts
Customers who need on-site curing
Products requiring strong bonding after assembly
At Laimeisi, we offer full customization for semi-cured silicone coated fiberglass fabric:
Fiberglass type: E-glass, high-strength fiberglass
Base fabric thickness: customizable
Silicone coating: one-side / two-side
Coating weight: adjustable
Color: red, grey, white, black, customized
Curing degree: precisely controlled
Flame-retardant & low-smoke grades available
With stable production control, we ensure consistent curing level, which is critical for downstream processing.
Semi-cured silicone coated fiberglass fabric is a highly practical material for manufacturers who need flexibility in processing, strong final bonding, and reliable thermal performance.
By allowing secondary curing, it gives engineers more control over final product performance—something fully cured materials cannot offer.
Need help choosing between semi-cured and fully cured silicone coated fiberglass fabric?
Our technical team is ready to support your application.
