OSI Quad Max Bootbhay Blue Elastomeric Polymers Caulk Sealant in a 9.5 oz cartridge is your go-to solution for a durable, permanently flexible seal that works indoors and outdoors. This blue elastomeric sealant is designed to move with the substrate, resisting cracking and separating as temperatures shift and framing flexes.
Key advantages you’ll notice on every project:
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Moisture and mildew resistance: keeps gaps sealed in bathrooms, kitchens, basements, and exterior applications where dampness is common.
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Permanently flexible formula: accommodates expansion and contraction over time, reducing re-seals and callbacks.
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Elastomeric polymer composition: delivers a resilient, long-lasting seal that stands up to use and weather without degrading.
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Paintable finish: customize with color-matched paint to achieve seamless integration with walls, trim, or decorative accents.
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Indoor and outdoor versatility: ideal for windows, doorframes, siding joints, cabinetry seams, countertops, basements, or exterior fascia.
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Simple cleanup: wipe away excess while wet and clean tools with mineral spirits for a clean, professional result.
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Not fire or high-heat resistant: purposefully engineered for typical building envelope and interior finishes, not designed for high-heat or fire-rated applications.
Color and appearance: Bootbhay Blue, part of the Blue color family, blends with cool-toned palettes or can be used as a deliberate design accent where a visible seam is desired.
Who should consider this sealant? DIY homeowners, remodeling professionals, and contractors who need a reliable, one-component sealant that provides excellent moisture resistance, ongoing flexibility, and paintability without sacrificing ease of use. The 9.5 oz cartridge delivers ample coverage for typical remodel jobs, making it a practical choice for sealing around fixtures, framing, and exterior joints where a flexible, water-resistant seal is essential.
Pro tips for best results: prep the surface to be clean and dry, cut the nozzle to the desired bead size, apply the sealant evenly with a caulk gun, and tool the seam with a damp finger or appropriate tool for a smooth, professional finish. Allow curing as directed on the packaging to achieve maximum adhesion and flexibility.
