Silicone Sealant Flexible Waterproof Neutral Cure
High Quality
Free US Shipping
Hassle Free Returns
Finally, a waterproof sealant that stays flexible and strong
Create durable, waterproof bonds on diverse surfaces — 138 psi adhesion strength, flexible after curing, and weather-resistant from -58°F to 302°F
Why is this Waterproof Silicone Sealant perfect for you?
✔ Strong structural bonding on various materials: The sealant offers 138 psi adhesion strength ensuring reliable bonding between glass, concrete, metal, brick, and tiles. This makes it ideal for structural repairs and construction without the need for mechanical fasteners.
✔ Flexible formula adapts to movements and stress: After curing, the silicone remains flexible, accommodating thermal expansion, vibrations, and structural movements. This flexibility prevents tearing or failure, ensuring long-lasting repair and sealing performance indoors and outdoors.
✔ Waterproof, weather-resistant, and non-toxic: The sealant protects against moisture, rain, and UV exposure across a temperature range of -58°F to 302°F. Its neutral curing formula emits a mild odor, is skin-friendly, and safe for enclosed spaces and aquariums.
Specifications
Adhesion Strength: 138 psi
Material Composition: Silicone 9900 formula
Temperature Range: -58°F to 302°F
Volume: 10.1 fl oz
Frequently asked questions
Quick answers about ordering from Couje. More detail on our full FAQ page.
How much does shipping cost, and how long does it take?
Shipping is free on every order — no minimum. Orders are typically delivered within 4–12 business days (processing included), and every order includes tracking. Full details are in our Shipping Policy.
What is your return policy?
You can return items within 30 days of delivery. Once your return is received and inspected, we process your refund to the original payment method. See our Return & Refund Policy for the full process.
How do I track my order?
As soon as your order ships, we email you a tracking number. You can follow your delivery at any time on our Track Your Order page.
How can I reach customer service?
Email us at support@couje.com or use our contact form. Our team is available Monday – Friday: 09:00 AM – 05:00 PM EST and replies within 24 hours. Saturday – Sunday: closed.