Momentive RTV5249 Grey

Description

Momentive RTV5249 Grey Electronic Silicone Adhesive Sealant 300ml Cartridge

Momentive RTV5249 is a single-component, ready-to-use silicone adhesive sealant belonging to the RTV5240 series. Engineered with alkoxy neutral cure chemistry, it produces no corrosive by-products, making it safe for electronic and electrical applications where traditional acetic-cure silicones would damage sensitive metals like copper.

Its fast-curing formulation builds green strength rapidly, curing up to four times faster than standard alkoxy silicones. The cured elastomer is tough, resilient, and tear-resistant, retaining flexibility and sealing performance over a wide temperature range.

Key electrical properties include:

• Dielectric Strength: 20 kV/mm (500 V/mil)

• Volume Resistivity: 3 × 10¹⁵ ohm·cm

• Dielectric Constant: 2.8 (60 Hz)

RTV5249 adheres well to most metals, painted surfaces, and plastics without primers, though Momentive recommends primers like SS4179 (plastics/painted surfaces) and SS4004/SS4044 (metal substrates) for demanding applications.

It is electronics-safe, solvent-free, and low-odor, making it suitable for sensitive environments such as semiconductors, integrated circuits, and electrical connectors.

Uses of the Product

• Adhesive and sealing applications in electronics and circuit assemblies.

• Encapsulation and protection of semiconductors and connectors.

• Industrial sealing for sensitive plastics and metals.

• High-strength bonding in automotive, aerospace, and appliances.

• Electrical insulation in harsh and moist environments.

Applications

• Aerospace & Defense Electronics

• Automotive & Transportation Components

• Electrical & Power Electronics

• Industrial Equipment & Appliances

• Sealing and gasketing in high-reliability assemblies

Technical Specifications

RTV5249 Grey Sealant

• Color: Grey

• Cure System: Alkoxy, neutral cure, one-part

• Form: High body build paste

• Specific Gravity: 1.5

• Tack-Free Time: ~45 min @ 22 °C, 50% RH

• Skin-Over Time: ~10 min

• Cure Depth: 3 mm in ~6 hours

• Full Cure: 24 hours (3 mm section)

• Shore A Hardness: 40

• Tensile Strength: 2.2 MPa (320 psi)

• Elongation: 425%

• Tear Strength: Excellent (high tear resistance)

• Dielectric Strength: 20 kV/mm (500 V/mil)

• Dielectric Constant: 2.8 (60 Hz)

• Volume Resistivity: 3 × 10¹⁵ ohm·cm

• Service Temperature Range: -59 °C to +204 °C (-75 °F to +400 °F)

• Flash Point: > 93 °C

• Pack Size: 300 ml cartridge

Why Buy From Maisam Dubai

• Supplier of genuine Momentive RTV silicones.

• Electronics-safe, neutral cure adhesive sealants for sensitive applications.

• Meets industrial, automotive, and aerospace requirements.

• Competitive pricing for industrial and bulk orders.

• Fast delivery across UAE, Saudi Arabia, Oman, Qatar, Bahrain, and Kuwait.

• Technical expertise and after-sales support.

FAQs

Q1. What is Momentive RTV5249 used for?
It is used as a grey silicone adhesive sealant for electronics, sensitive metals, plastics, and high-performance sealing applications.

Q2. Is RTV5249 safe for electronics?
Yes, it is a neutral cure, non-corrosive formulation safe for use on copper and electronic assemblies.

Q3. How fast does it cure?
It develops a tack-free skin in ~45 minutes and cures to 3 mm depth in ~6 hours. Full cure is achieved in ~24 hours.

Q4. What temperature range can it handle?
It retains flexibility and strength from -59 °C to +204 °C (-75 °F to +400 °F).

Q5. Does it require a primer?
Not for most substrates. For challenging materials, Momentive primers such as SS4179, SS4004, or SS4044 are recommended.

Q6. Do you supply across GCC?
Yes, Maisam Dubai supplies RTV5249 across UAE, Saudi Arabia, Oman, Qatar, Bahrain, and Kuwait.

Call to Action

Looking for Momentive RTV5249 Grey Silicone Adhesive Sealant in the GCC?
📞 Phone: +971 52 167 2252
📩 Email: sales@maisamdubai.com
🌍 Serving: UAE, Saudi Arabia, Oman, Qatar, Bahrain, Kuwait