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OSI Quad Max Black Hills Elastomeric Polymers Caulk Sealant 9.5 oz
OSI Quad Max Black Hills Elastomeric Polymers Caulk Sealant 9.5 oz
OSI Quad Max Black Hills Elastomeric Polymers Caulk Sealant 9.5 oz
OSI Quad Max Black Hills Elastomeric Polymers Caulk Sealant 9.5 oz
OSI Quad Max Black Hills Elastomeric Polymers Caulk Sealant 9.5 oz
OSI Quad Max Black Hills Elastomeric Polymers Caulk Sealant 9.5 oz
OSI Quad Max Black Hills Elastomeric Polymers Caulk Sealant 9.5 oz
OSI Quad Max Black Hills Elastomeric Polymers Caulk Sealant 9.5 oz
OSI Quad Max Black Hills Elastomeric Polymers Caulk Sealant 9.5 oz
OSI Quad Max Black Hills Elastomeric Polymers Caulk Sealant 9.5 oz
OSI Quad Max Black Hills Elastomeric Polymers Caulk Sealant 9.5 oz

OSI Quad Max Black Hills Elastomeric Polymers Caulk Sealant 9.5 oz

Made in America

Support American manufacturers + independent hardware retailers in one purchase.

Stays flexible through hot summers and cold winters while blocking moisture and mildew, indoors or out.
Osi MPN 1868720
Sold Locally Only

This product isn’t sold on our website — see your local hardware store.

Typical Store Price i
Typical store price: low $11.99, average $13.99
In-Store Exclusive

This one's worth the trip to the store.

Brands like Weber, Milwaukee, Yeti, and DeWalt restrict where their products can be sold online — and for good reason. In-store buyers get authentic products, full manufacturer warranty, and access to pricing that simply isn't allowed to be advertised on the web.

  • Authorized dealer network · Full manufacturer warranty & support
  • Guaranteed authentic · No counterfeits, no gray-market resellers
  • The brands set these standards · Be wary of sellers who don't follow them
Why isn't this online? The whole story →

About Product Overview

OSI Quad Max is a pure silicone sealant built for gaps and joints that need to stay flexible through seasons of expansion and contraction. It goes on indoors or out and holds up against moisture and mildew, making it a solid choice for kitchens, baths, trim work, or exterior siding and window joints. The Black Hills color blends into stone, wood, and masonry work where a visible bead would stand out.

  • 9.5 oz cartridge, covers about 29.1 linear feet
  • Permanently flexible elastomeric polymer formula
  • Paintable once cured
  • Moisture and mildew resistant
  • Rated for indoor and outdoor use

The Details Specifications

Brand Osi
UPC 028756967750
Case Pack Quantity 12 per case
Retail Unit Quantity 12
Dimensions (L × W × H) 8 × 6 × 13
Weight 11 lbs
Country of Origin USA
Safety Data Sheet (SDS) Manufacturer documentation · opens in new tab
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Why we built NHG
You might find it for less locally. Independent retailers often offer competitive pricing — some products are even cheaper in-store than online.
Real expert advice — not search results. Independent hardware staff know their inventory and the local conditions you're working in.
Keep the neighborhood working. Every dollar spent at an independent retailer returns roughly 3x more to your local economy than at a national chain.

Ask our counter. Or theirs.

Most hardware stores can do more than you think. If we can't help you, the folks down the street probably can — just ask at the counter.

What we offer
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Ships Nationwide From our distribution network
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$0.68 of every dollar spent at a local independent business stays in the community. At a national chain, it's about fifteen cents. Civic Economics, multi-city retail studies
Their Counter
Try local first · we'll wait

The stores we send you to are local and independently run — often for generations, the kind of place where someone behind the counter knows the regulars. We don't own them. We just think they deserve the foot traffic. They can put most of what we sell on their next truck. Ask there before you check out here.

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About our directory. National Hardware Group is an independent retailer and directory. The local stores we list and link to are separately owned and operated — we have no ownership stake in any of them, and most pay us nothing to be included. That includes plenty of stores flying a familiar banner that people don't realize are locally owned and run, not operated by a corporation. Store owners can choose to upgrade their listing for an enhanced presence or pickup features, but the base directory is free, and inclusion is never a paid endorsement.

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