OSI Quad Max Timberbark Hardie Elastomeric Polymers Caulk Sealant is a 9.5 oz cartridge crafted for durable, long-lasting seals in interior and exterior spaces. This paintable, moisture-resistant caulk sealant uses elastomeric polymer technology to deliver a permanently flexible seal that moves with your substrate without cracking or shrinking. The Timberbark Hardie brown shade blends naturally with brown tones, helping joints disappear into the finish while providing reliable protection against the elements.
Key benefits that matter
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Permanent flexibility: Elastomeric polymers maintain a robust seal as substrates expand and contract with temperature and moisture changes.
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Moisture and mildew resistance: Designed to stand up to damp environments, helping prevent water intrusion and mildew growth where humidity is common.
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Paintable finish: Customize the sealant to match or complement your project, ensuring a seamless look after application.
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Indoor and outdoor versatility: Suitable for a wide range of applications, from living spaces to exterior joints exposed to weather.
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Timberbark Hardie color: A brown shade that blends with brown-toned surfaces and trims for a cohesive appearance.
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Cartridge convenience: The 9.5 oz container fits standard caulking guns for easy, controlled application.
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Safety and performance notes: Not fire or high-heat resistant, but engineered for reliable performance in typical interior/exterior environments.
Ideal uses and scenarios
- Sealing joints and seams in both interior and exterior projects where moisture control is important.
- Sealing around windows, doors, trim, and other outline details where a flexible, paintable seal is desired.
- Backing expansion joints and long runs where movement and weather exposure are expected, helping prevent cracking over time.
- Bathrooms, kitchens, basements, and outdoor living areas where mildew resistance provides added protection.
Product details at a glance
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Product Type: Caulk Sealant
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Brand: OSI
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Sub Brand: Quad Max
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Container Size: 9.5 oz
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Color: Timberbark Hardie (Brown family)
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Coverage Area: 29.1
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Indoor/Outdoor: Indoor and Outdoor
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Moisture Resistant: Yes
Mildew Resistant: Yes -
Paintable: Yes
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Permanently Flexible: Yes
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Fire / High Heat Resistant: No
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Material: Elastomeric Polymers
OSI Quad Max Timberbark brings together long-lasting elasticity, reliable moisture control, and a finish-ready color that fits naturally into brown-toned designs. Whether updating exterior siding or refreshing interior trim, this sealant delivers a dependable seal with a clean, paintable finish that maintains its integrity over time.
