Flexible Waterproof Sealant Mastic | Fast-Curing Barrier for Pipes and Wall Openings
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Seal gaps around pipes, conduits, and wall openings with a flexible mastic designed to help block water and air leaks. Its dense formula expands slightly as it’s applied to fill small gaps, making it useful in basements, bathrooms, and outdoor installations.
Why It’s Useful
- Adheres to wood, concrete, metal, PVC, and drywall without primer.
- Forms a flexible seal that resists peeling and cracking as temperatures change.
- Sets quickly to help reduce repair downtime.
- Low odor and formulated without volatile organic compounds or toxic additives, according to the product specifications.
- Its dense, non-porous texture helps block pests from passing through small gaps.
Details
- Application temperature: above 5°C (41°F) for optimal curing.
- Formulation: polydimethylsiloxane, polyurethane, silica, methyl methacrylate, and epoxy resin.
- Non-flammable and non-corrosive formulation.
- Listed dimensions: 10.6 × 6 cm (4.17 × 2.36 in).
Application and Care
Apply to surfaces that are clean, dry, and free of dust or grease. Keep water away during initial curing. Wear gloves while applying and wash hands after handling uncured mastic. Store sealed in its original packaging in a cool, dry place.
In the Package
Two waterproof sealant mastic units.
What our customers have to say:
Great quality, very happy!
Overall very happy, quality is as great as expected and the shipping was quick.
Works like shown!
I was sceptical at first, but it legit looks and works like shown in the videos. Can recommend!
Support is awesome!
My item sadly arrived damaged since it had small scratches. I got a replacement 100% free within 5 days.
Exactly what I needed
I saw this on Pinterest and was instantly hooked. Very pleased to see it looking exactly the same in person.
Free shipping on orders over $100 / €100 / £100. We ship worldwide with trusted carriers such as DHL, FedEx, UPS, USPS, Royal Mail, and local EU postal partners.
Returns and exchanges are accepted within 30 days of delivery to start a return, please reach out to us via our Contact page.
If you need help with your order, contact us at info@mylvera.com. Our customer service team is available Monday – Friday, 9:00 AM – 6:00 PM (GMT+2).
