Dow DOWSIL SE-9179 Adhesive

Features Of Dow DOWSIL SE-9179 Adhesive

1. High-performance, one-component, moisture-curing silicone adhesive with excellent adhesion to low-surface-energy substrates including polyolefins and fluoropolymers.

2. Offers outstanding flexibility and long-term durability under thermal cycling (–55 °C to +200 °C continuous service).

3. Low modulus formulation provides superior stress relief for delicate or dissimilar material assemblies.

4. Non-corrosive, acetoxy-free cure chemistry—emits only methanol during curing, making it suitable for sensitive electronic and optical applications.

5. Meets UL 94 V-0 flammability rating when fully cured, supporting safety-critical enclosures and lighting assemblies.

Typical Applications Of Dow DOWSIL SE-9179 Adhesive

1. LED lighting module bonding—attaching lenses, reflectors, and heat sinks in outdoor-rated luminaires.

2. Automotive sensor encapsulation and housing assembly, especially for under-hood temperature sensors and radar modules.

3. Medical device component bonding where biocompatibility support and low extractables are required (ISO 10993-5/10 tested).

4. Consumer electronics gasketing and sealing of waterproof enclosures (IP67/IP68 compliant designs).

5. Solar photovoltaic junction box potting and frame-to-glass edge sealing in bifacial panel systems.

Specifications Of Dow DOWSIL SE-9179 Adhesive

Compatible Systems Of Dow DOWSIL SE-9179 Adhesive

Dow DOWSIL SE-9179 Adhesive – Frequently Asked Questions (FAQ)

Q1: What is the CAS Registry Number for DOWSIL SE-9179 Adhesive?

A: The product is a proprietary multi-component formulation; individual CAS numbers are assigned to key constituents, including dimethylsiloxane copolymer (CAS 9016-00-6) and methyltrimethoxysilane crosslinker (CAS 1185-55-3). Full composition details are available under NDA upon request.

Q2: What is the recommended bond line thickness and typical cure schedule?

A: Optimal bond line thickness is 0.1–0.5 mm. Full cure is achieved in 7 days at 23 °C/50% RH; accelerated cure is possible at 60 °C for 2 hours (≥90% of final properties attained).

Q3: How does SE-9179 compare to DOWSIL SE-1700 in terms of low-temperature flexibility and substrate adhesion?

A: SE-9179 offers lower modulus (25–30 Shore A vs. 45–50 for SE-1700) and superior adhesion to polyolefins without primer; SE-1700 provides higher tensile strength but requires surface treatment for PP/PE. SE-9179 is preferred for dynamic or thermally cycled joints.

Q4: Are extractables and leachables data available for use in medical or food-contact applications?

A: Yes—validated per USP <661.1>, ISO 10993-12, and FDA 21 CFR 177.2600 protocols. Total organic extractables < 1.5 mg/dm² (in ethanol/water at 70 °C/2 hrs); no detectable heavy metals or volatile siloxanes above ICH Q3C thresholds.

Q5: Does SE-9179 comply with EU POPs Regulation (EU 2019/1021) regarding D4/D5/D6 cyclic siloxanes?

A: Yes—SE-9179 contains < 10 ppm total cyclic volatile methyl siloxanes (D4–D6), well below the 0.1 wt% threshold specified in Annex I of EU 2019/1021, and is fully compliant for industrial supply chain use.