DOWSIL 93-104 Ablative Material Kit
Harmonization Code : 3910.00.00.90 | Silicones in Primary Forms; Others
Main features
- Protects surfaces from direct flame and extreme heat exposure
- Forms a tough char with less than 0.1 mm/s penetration
- Supports brush, roll, trowel, or molded application methods
Product Description
DOWSIL™ 93-104 Ablative Material Kit is a two-part silicone elastomer formulated to provide thermal protection in severe flame, heat-flux, and high-shear environments. The material forms a tough, tenacious, and durable surface char when exposed to extreme heat and can be cured at room temperature or with accelerated heat. It is trowel-applied or moldable and is designed for protecting launch equipment exposed directly to rocket blasts and external surfaces subjected to atmospheric friction at hypersonic speeds.
Key Features
- Protective surface char: Forms a tough, tenacious, and durable char that provides flame and heat-flux resistance.
- Extreme-environment performance: Designed for high-shear, high-heat-flux environments and brief exposure to temperatures above 3000°C.
- Flexible processing: Two-part material supports room-temperature or accelerated heat curing and can be troweled or molded.
- Environmental durability: Provides resistance to weathering, moisture, and ozone.
Applications / Suitable for
- Protecting launch structures exposed directly to flame from rocket blasts
- Thermal protection in high-shear and high-heat-flux environments
- Heat shielding external surfaces exposed to atmospheric friction at hypersonic speeds
TDS, SDS & Technical Documents
Technical Specifications
No specifications available.
Additional Information
DOWSIL™ 93-104 Silicone Ablative
A two-part, addition-cure silicone elastomer for direct rocket-blast protection and external hypersonic heat shielding. It forms a tough, tenacious char, supports room-temperature or accelerated heat cure, and can be brushed, rolled, troweled, or molded for horizontal applications. Product-specific field evaluation should define the required thickness and configuration.
Material and processing characteristics
Values and characteristics apply to standard DOWSIL™ 93-104 Silicone Ablative unless otherwise noted.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Material and cure system | Two-part silicone elastomer; addition cure | - | Room-temperature or accelerated heat cure |
| Working time | 5 | hours | Room temperature |
| Application method and orientation | Brush, roll, trowel, or mold; horizontal surfaces | - | Manual application to target thickness; moldable into custom parts and shapes |
| Thermal stability | -65 to +200 | °C | Thermal-stability range; short-duration extreme-temperature exposure is listed separately |
| Short-duration temperature exposure | >3000 | °C | Short periods only; application-specific validation is required |
| Environmental resistance | Weathering, moisture, and ozone resistance | - | Qualitative product characteristic |
Standard and Fast Cure variants
Standard DOWSIL™ 93-104 provides the longer working window and moldable format covered on this page. DOWSIL™ 93-104 Ablative Fast Cure is a separate variant for shorter working and room-temperature cure windows.
| Variant | Working time | Cure time at room temperature | Application and selection note |
|---|---|---|---|
| DOWSIL™ 93-104 Ablative | 5 hours | ≤24 hours | Brush, roll, trowel, or mold; suited to evaluations requiring the longer working window or molded custom shapes. |
| DOWSIL™ 93-104 Ablative Fast Cure | 2.5 hours | ≤12 hours | Brush, roll, or trowel; shorter working and room-temperature cure windows. |
For standard DOWSIL™ 93-104, room-temperature comparison data list cure at ≤24 hours, while full cure may take 24 to 48 hours depending on application thickness.
Surface preparation, application, and cure
Prepare and clean the substrate before applying DOWSIL™ 93-104 to a validated target thickness. Cure can proceed at room temperature or be accelerated with heat. Final process details and thickness must be qualified for the specific fuel, flame-impingement location, geometry, and protection requirement.
Recommended process sequence
Flame-exposure and adhesion data
Flame-exposure results apply to a 4.8 mm coating on ceramic tile exposed to 3500°C. Adhesion-profile values are reported in pounds per linear inch for bare and primed steel and concrete.
DOWSIL™ 93-104 Silicone Ablative as applied, after 10 seconds at 3500°C, and after 30 seconds at 3500°C.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Coating thickness | 4.8 | mm | Applied to ceramic tile for flame-exposure testing |
| Exposure temperature | 3500 | °C | Exposure up to 30 seconds |
| Penetration rate | <0.1 | mm/sec | 4.8 mm coating on ceramic tile at 3500°C |
| Bulk loss rate | 0.11 | g/sec | 4.8 mm coating on ceramic tile at 3500°C |
| Exposure time before tile fracture | >30 | seconds | Time before tile fracture during the bottom-temperature-rise evaluation at 3500°C |
| Adhesion profile - bare steel | 5.1 | lb/linear in | Steel substrate without primer |
| Adhesion profile - primed steel | 7.8 | lb/linear in | Primed steel substrate |
| Adhesion profile - bare concrete | 5.1 | lb/linear in | Concrete substrate without primer |
| Adhesion profile - primed concrete | 7.6 | lb/linear in | Primed concrete substrate |
Thermal-protection applications
DOWSIL™ 93-104 combines direct-flame protection with moldable application options for demanding aerospace and launch-system thermal environments.
DOWSIL™ Silicone Ablatives
Evaluate DOWSIL™ 93-104 for your thermal-protection design
Contact Krayden to discuss application fit, standard versus Fast Cure selection, surface preparation, thickness validation, controlled technical-document access, and product availability for your aerospace or launch-system program.
