QUAD Max 9.5 fl. oz. Bilco Gray #525 Exterior, Window, Door, and Siding Caulk Sealant
Product Overview
OSI QUAD MAX is built to take on the toughest weather conditions—rain, snow, sun, or heat. Formulated for use around exterior and interior windows, doors, and siding, this high-performance sealant creates a strong, flexible bond on a wide range of surfaces including fiber cement, vinyl, wood, metal, stone, stucco, glass, and more. Its advanced formula allows for application on wet or cold surfaces and cures quickly—ready to be painted in just one hour (conditions may affect drying time). With exceptional flexibility and durability, it’s the go-to choice for professionals who need lasting results with zero compromises.
Key Features
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Ideal for sealing around windows, doors, and siding to guard against weather intrusion
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Strong adhesion to common building materials including brick, aluminum, PVC, and more
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100% waterproof and suitable for application on damp surfaces
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Flexible performance with up to 5x stretch and Class 50 Joint Movement capability
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Long-lasting seal that resists shrinking, cracking, or bubbling
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Quick 24-hour cure time and paintable in as little as 1 hour
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Withstands harsh conditions, from freezing cold to extreme heat (0°F to 140°F)
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Compatible with thousands of exterior colors using OSI’s online color match tool
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Note for California residents: Please refer to Proposition 65 warnings
