Dowsil RTV3000F (45-Gram-Tube)

SILASTIC™ RTV-3110 Mold-Making Base

Overview

SILASTIC™ RTV-3110 Mold-Making Base is a two-part condensation-cure RTV silicone rubber developed by Dow for general-purpose mould making, electronic encapsulation and potting applications. Featuring a low mixed viscosity and adjustable cure times through the selection of compatible catalysts, RTV-3110 accurately reproduces intricate surface details while curing at room temperature into a durable, flexible silicone rubber. Unlike higher-viscosity grades, RTV-3110 can often be used without vacuum de-airing, making it ideal for fast, uncomplicated mould production.

Key Technical Specs

• Product Type: Two-component condensation-cure RTV silicone rubber
• Base Colour: White
• Viscosity: 130 poise at 25°C
• Specific Gravity: 1.14
• Mix Ratio (Typical): 10:1 by weight (Base : SILASTIC™ RTV-3010-S Catalyst)
• Compatible Catalysts:
  • SILASTIC™ RTV-3010-S Catalyst
  • SILASTIC™ RTV-3000 F Catalyst
  • DOWSIL™ 4 Catalyst
• Service Temperature: -55°C to +200°C (-67°F to +392°F)
• Tensile Strength: 395 psi
• Elongation: 170%
• Shore A Hardness: 45
• Typical Demould Time (10:1 with RTV-3010-S): Approximately 7 hours
• Typical Working Time (10:1 with RTV-3010-S): Approximately 2 hours

Approvals & Specifications

• Manufactured by Dow
• Tested to ASTM D150, ASTM D149 and ASTM D257 electrical property standards
• Suitable for mould making, electronic encapsulation and conformal coating applications

Typical Applications

• General-purpose silicone mould making
• Prototype and production tooling
• Electronic potting and encapsulation
• Conformal coating of electronic assemblies
• Precision casting requiring fine detail reproduction
• Simple moulds with minimal undercuts

Compatibility & Safety Notes

• RTV-3110 may be used without vacuum de-airing for many applications due to its low viscosity
• Vacuum de-airing is recommended where maximum detail reproduction or void-free moulds are required
• Do not use SILASTIC™ RTV-3010-S or RTV-3000 F Catalyst when moulding polyester resins, as cure inhibition may occur; use DOWSIL™ 4 Catalyst instead
• Mix thoroughly but avoid excessive mixing or temperatures above 35°C
• Store unopened containers at or below 32°C
• Consult the Safety Data Sheet (SDS) before handling and use appropriate personal protective equipment

Packaging & Procurement

• SILASTIC™ RTV-3110 Mold-Making Base
• SILASTIC™ RTV-3010-S Catalyst
• SILASTIC™ RTV-3000 F Catalyst
• DOWSIL™ 4 Catalyst
• Supplied as a two-component RTV silicone mould-making system

Why This Product is Chosen for AOG / MRO

• Low viscosity allows easy pouring and accurate reproduction of complex components
• Adjustable cure rates provide flexibility for different repair and tooling requirements
• Wide operating temperature range supports demanding aerospace environments
• Can often be used without vacuum de-airing, reducing preparation time
• Suitable for both mould making and electronic encapsulation tasks
• Produces durable, flexible moulds with excellent dimensional accuracy

Practical Suggestions for Your Team (AOG Mindset)

• Use the standard 10:1 mix ratio with RTV-3010-S Catalyst for predictable curing and mechanical properties
• Select DOWSIL™ 4 Catalyst when producing polyester moulds to prevent cure inhibition
• Brush a thin initial coat onto intricate masters before pouring the bulk material to minimise trapped air
• Although vacuum de-airing is often unnecessary, use it for highly detailed or critical moulds where void-free casting is essential
• Allow approximately seven days for the silicone to reach its full mechanical properties before demanding service

Manufacturer / Aviation Spec Codes

• Manufacturer: Dow
• Product Name: SILASTIC™ RTV-3110 Mold-Making Base
• Product Type: Two-component condensation-cure RTV silicone rubber
• Compatible Catalysts: SILASTIC™ RTV-3010-S, SILASTIC™ RTV-3000 F and DOWSIL™ 4
• Typical Mix Ratio: 10:1 by weight (with RTV-3010-S Catalyst)
• Primary Applications: Mould making, electronic potting, encapsulation and conformal coating