Application of DOWSIL™ 8888 Sealant in Automotive Engine Gasket Sealing

An automotive parts manufacturer faced challenges with insufficient sealing and low installation efficiency when using traditional pre-cut gaskets for engine applications. They required a screen-printable sealant compatible with automated processes and resistant to engine high temperatures and fuel exposure.

DOWSIL™ 8888 Beige sealant was applied via screen printing on metal gasket surfaces:

• Utilized its excellent flow (106mm/30g) for uniform coverage
• Neutral cure property prevented substrate corrosion
• 80-minute tack-free time allowed production line adjustments
• 200% elongation after curing accommodated thermal expansion

• Sealing performance: Zero leakage in -40℃ to 150℃ cycling tests, passed 300-hour Fuel B resistance test
• Production efficiency: Screen printing increased speed by 3x compared to manual application, reducing defect rate by 40%
• Long-term reliability: No aging or cracking after simulated 100,000km road test

• Application environment: 23℃ constant temperature workshop, 10,000mPa·s viscosity ensured printing accuracy
• Curing condition: Achieved final properties (Shore A 25) after 7 days at 25℃/50%RH
• Packaging efficiency: 19kg packaging supported 8-hour continuous production

This case demonstrates DOWSIL™ 8888's suitability for precision flat sealing applications, including transmission side covers and oil pans. Its screen printing compatibility provides standardized solutions for automotive parts automation.