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Tropical #9400 Eterna-Sil Premium Silicone Mastic
Why Contractors Love
Tropical #9400 Eterna-Sil Premium Silicone Mastic
Ideal for repairs and flashing details on silicone roofing systems
100% silicone — flexible and durable under UV and ponding water
Excellent adhesion to most roofing surfaces, including aged coatings
Easy to apply by brush, roller, or trowel for quick, on-site repairs
Fast moisture cure — resists rain wash-off and reduces jobsite delays
Backed by Tropical Roofing Products — 70+ years of trusted performance
Fast, durable repairs with Tropical #9400 Eterna-Sil
Tropical #9400 Eterna-Sil is a high-solids, professional-grade silicone roof sealant designed for repairs, flashing details, penetrations, seams, and cracks on existing roofing systems. Its 100% silicone formulation delivers long-lasting waterproof protection, even in areas with ponding water or harsh UV exposure.
9400 Eterna-Sil bonds to most roof surfaces including metal, single-ply, modified bitumen, and aged coatings. It cures quickly with exposure to moisture and stays flexible, helping contractors finish repairs fast and keep projects on schedule.
Choose 9400 Eterna-Sil for reliable, contractor-trusted repair performance that stands up to the elements.
