DOWSIL-1200-OS/CLEAR (309-g)

Additional Product Information

Key Technical Specifications

• Product Type: Silicone adhesion promoter / primer
• Chemistry: Dilute solution of silane coupling agents in low molecular weight silicone fluid
• Form: Clear liquid primer
• VOC Compliance: Meets multiple international low VOC regulations (including European Union standards)
• Compatibility: Suitable for moisture-curing RTV and heat-cure silicones
• Application Methods: Wipe, dip, or spray application
• Recommended Coating: Very thin, uniform layer

Approvals & Specifications

• Complies with international low VOC content requirements
• Comparable performance profile to DOWSIL™ P5200 Adhesion Promoter
• Designed for aerospace, electronics, industrial, and general bonding applications

Typical Aircraft MRO & AOG Applications

• Priming metal, glass, and composite surfaces prior to silicone bonding
• Aircraft interior panel bonding preparation
• Electronics and PCB assembly protection systems
• Structural plastic adhesion enhancement in aircraft systems
• Rapid adhesion preparation for AOG repair scenarios

Compatibility & Safety Notes

• Compatible Substrates: Metals, ceramics, glass, wood, masonry, FR-4, and structural plastics
• Surface Preparation: Best results achieved with clean, lightly abraded, and degreased surfaces
• Solvent Use: Compatible with MEK, mineral spirits, naphtha, acetone, and IPA for cleaning
• Handling: Apply in thin layers; overapplication may result in white or chalky residue
• Safety: Ensure adequate ventilation during use; allow full solvent evaporation before curing

Packaging & Procurement

• Supplied in 309-g container format
• Designed for controlled industrial and aerospace application
• Stored as a ready-to-use adhesion promoter system

Why DOWSIL™ 1200 OS Is Chosen for MRO & AOG

• Improves bonding reliability of RTV and heat-cure silicone systems
• Enhances adhesion across a wide range of aerospace materials
• Supports fast, efficient surface preparation in time-critical repairs
• Low VOC formulation supports regulatory compliance and environmental standards
• Enables strong, durable bonding even on difficult-to-adhere substrates

Application & Processing Guidelines

• Apply a very light, even coating using wipe, dip, or spray methods
• Avoid excess material to prevent chalky surface residue
• Reapply fresh primer to applicator every 3–5 minutes during use
• Allow solvent to fully evaporate before silicone application

Surface Preparation Guidance

• Recommended cleaning: MEK, mineral spirits, naphtha, acetone, or IPA
• Enhancement methods: Light abrasion, plasma, corona discharge, UV, flame, or chemical etching
• Ensure surfaces are fully dry and contaminant-free prior to priming
• Best practice: Optimize surface energy for maximum adhesion performance

Processing & Curing

• Cures via atmospheric moisture reaction at room temperature
• Typical cure time: 1–2 hours at 20–90% relative humidity
• Low humidity or low temperature conditions extend cure time
• Heat acceleration possible up to 60°C (140°F) maximum
• Final silicone elastomer must be applied after full primer cure

Alternative Names

• DOWSIL™ Silicone Adhesion Primer
• Silanized Surface Adhesion Promoter
• RTV Silicone Bonding Primer
• Silicone Surface Treatment Agent