DAPCO-2100 (2.5-floz-Tube)

DAPCO™ 2100 Silicone Sealant

Overview

DAPCO™ 2100 is a one-part, solvent-free, thixotropic silicone paste designed for aerospace sealing, bonding, and protective coating applications. It is widely used in aircraft construction, repair, and maintenance where resistance to extreme temperatures, fire exposure, and aerospace fluids is required. The material also functions as an insulating and ablative heat shield in demanding environments.

Key Technical Specs

• Product Type: One-part RTV silicone sealant (thixotropic paste)
• Consistency: Thixotropic paste
• Viscosity: >20,000 poise (>2,000 Pa�s)
• Specific Gravity (cured): 1.37
• Thermal Conductivity: 0.224 W/m�K
• Hardness: Shore A 50
• Tack Free Time: 10�15 minutes
• Service Temperature: -54°C to +204°C (-65°F to +400°F)
• Non-volatile content: 96%

Approvals & Specifications

• Qualified to BMS 5-63
• Qualified to AMS3374
• Qualified to BAMS 552-004
• Qualified to CMNP009

Key Features & Benefits

• Excellent fire resistance (self-extinguishing; flame resistance up to ~1927°C substrate conditions)
• High temperature and low temperature stability
• Primerless adhesion to a wide range of aerospace substrates
• Compatible with exposure to Skydrol® and other aerospace fluids
• Non-inhibiting cure with other sealants and adhesives
• High solids content (low shrinkage)
• Excellent environmental and chemical resistance

Typical Applications

• Aerospace sealing and filleting applications
• Aircraft structural bonding and gap filling
• Thermal insulation and heat shielding
• Maintenance and repair of aircraft assemblies
• Areas exposed to hydraulic fluids and extreme temperatures

Application Guidelines

• Ensure substrate is clean, dry, and free from contaminants
• Clean surfaces using approved solvent prior to application
• Apply as supplied (single-component system)
• Tack-free time: 10�15 minutes
• Handling strength: ~24 hours at 24°C
• Full cure: 7�14 days depending on application conditions

Curing Conditions

• Ambient cure above 13°C (55°F)
• Preferred relative humidity: 30%�70%
• Moisture-assisted curing mechanism
• Avoid contamination from incompatible materials (amines, sulfur compounds, old RTV silicones, certain rubbers)

Mechanical Properties (Typical)

• Lap shear strength: ~350 psi (varies by substrate)
• Peel strength: ~20 lb/in (0.025 in aluminium substrates)
• Good adhesion to aluminium, stainless steel, and titanium

Packaging & Availability

• 2.5 oz cartridges
• 6.0 oz cartridges
• Colour: Grey

Why This Product is Chosen for Aerospace Use

• Reliable sealing performance across extreme temperature ranges
• High resistance to fire and aerospace fluids
• Flexible, durable sealing under mechanical stress
• Strong adhesion without primer in many applications

Practical Suggestions for Your Team (AOG / MRO Context)

• Ensure full surface decontamination before application for best adhesion
• Respect cure time before loading or pressurising assemblies
• Avoid contamination from incompatible sealants or residues
• Maintain controlled humidity for consistent curing performance

Manufacturer / Aviation Spec Codes

• Product Name: DAPCO™ 2100 Silicone Sealant
• Manufacturer: Solvay Composite Materials
• Type: Aerospace RTV silicone sealant
• Specification Codes: BMS 5-63, AMS3374, BAMS 552-004