Dowsil 744 Circuit Board Component Bonding RTV Adhesive Sealant​

Basic Properties​

Dowsil™ 744 is a one-part, white, non-flowing RTV adhesive sealant designed for general-purpose bonding. With high elongation (590%) for stress relief, it cures at room temperature without mixing or ovens, and supports heat acceleration for faster production.

Product Description​

Curing via ambient moisture (30–80% RH), it achieves >90% physical properties in 24–72 hours. With a 10-minute skin-over time (25°C/50% RH) and workable time of 10–120 minutes, it cures inward at 0.25 inch/7 days. Silicone chemistry ensures stability across -45°C to 200°C with dielectric strength (15 kV/mm), ideal for electronics requiring long-term reliability.

Characteristics​

Beyond elongation, its tensile strength (2.7 MPa), tear resistance (20 N/cm), and low modulus (0.5 MPa) enable flexible bonding with minimal substrate stress. Shore A hardness 37 balances flexibility/support, while volume resistivity (5×10¹³ Ω·cm) ensures insulation. Adhesion to aluminum reaches 430 psi (substrate testing required), with 12-month shelf life (25°C).

Scenario application

Designed for automated/manual dispensing, it bonds large components (e.g., batteries, capacitors) to PCBs. Industry cases include capacitor fixation in EV battery modules, heatsink bonding in industrial power supplies, and shock-resistant encapsulation of HV capacitors in telecom equipment.

Shenzhen Huazhisheng New Materials Technology Co., Ltd. is a leading provider of environmentally friendly adhesives and technical solutions, specializing in the application of modified silicone rubber, epoxy adhesives, thermal materials, bonding adhesives, encapsulation adhesives, and UV adhesives across various industries such as electronics, home appliances, LED lighting, automotive, consumer electronics, rail transit, aerospace, and electrical power. Huazhisheng New Materials adheres to the corporate sustainable development strategy of "Progress, Innovation, Professionalism, and Integrity," and integrates the philosophy of "Quality, Efficiency, Environment-Friendly, and Reliability" throughout the entire product lifecycle. Our products have passed SGS, UL, FDA, DIN, and non-toxic certifications, and have been awarded multiple global patents, making us one of the primary suppliers of adhesives and new materials in China's new energy, electronics, automotive, industrial, packaging, environmental protection, construction, and high-speed rail sectors.
With an innovative perspective, we offer customized solutions, continuously develop leading technologies, and provide comprehensive support to clients across various industrial sectors. We are committed to collaborating with our clients to drive industrial transformation and upgrading, ensuring your sustained competitive edge.
Based on advancements in various polymer chemical materials, Huazhisheng New Materials has established a leading position in four key areas: coating, bonding, sealing, and thermal conductivity. Our efficient and environmentally friendly adhesive products and technical solutions help industrial enterprises enhance production efficiency and benefits, protect your electronic products from external chemical agents and harsh usage environments, and extend their lifespan, ensuring continuous and stable operation.