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DAP HVAC Silicone Aluminum 100% RTV Silicone HVAC Sealant 10.3 oz

DAP HVAC Silicone Aluminum 100% RTV Silicone HVAC Sealant 10.3 oz

Made in America

Support American manufacturers + independent hardware retailers in one purchase.

Stays flexible through heat and vibration, making it a solid pick for sealing ductwork and HVAC metal joints.
Dap MPN 7079808012 In Stock & Ready to Ship
$143.88
$11.99 each · sold by the case of 12 Free shipping on orders over $75
Ships within 24 hours · most orders arrive in about 2 business days
Cases of 12 · Order in multiples of 12

Sold by the Case

$143.88 per case of 12

Save $21.60 on orders $75+. Spend $75 or more to unlock 15% off every case — applied automatically at checkout. Free shipping at $75.

Ships as a complete case of 12. Free shipping on orders $75 and up.

About Product Overview

Ductwork and HVAC connections take heat, vibration, and moisture that ordinary caulk can't handle. DAP HVAC Silicone is a 100% RTV silicone sealant built for those spots, staying flexible after it cures so joints keep their seal instead of cracking over time. The aluminum color blends in on metal ductwork, and it holds up whether the job is inside the house or out.

  • 10.3 oz cartridge, covers approximately 55 linear feet
  • 100% RTV silicone, permanently flexible once cured
  • Fire and high heat resistant for HVAC and duct applications
  • Moisture and mildew resistant, rated for indoor and outdoor use
  • Not paintable; clean up with mineral spirits

The Details Specifications

Brand Dap
Model / MPN 7079808012
UPC 070798080126
Weight 9 lbs
Country of Origin USA
Safety Data Sheet (SDS) Manufacturer documentation · opens in new tab
Price check

Go ahead. Check.

You're going to price-check us against Amazon, Home Depot, and Lowe's. Everybody does. Good — open all three tabs. We'll wait. Then look hard at what you're actually being handed over there.

On Amazon, start with these four questions before you click buy.

01

Who's actually selling it

The brand name is on the listing. A different company is in the seller field. Those aren't the same thing, and the second one is who you're buying from.

02

Whether the warranty survives

Most manufacturers only honor a warranty when the unit came through an authorized dealer. We're authorized for Dap. A third-party marketplace seller usually isn't.

03

Where the box came from

Gray-market stock, returns repackaged as new, and outright fakes move through marketplaces constantly. It all looks identical in the photo. It stops looking identical when it fails.

04

Who you call when it breaks

Ours is a phone number with a person behind it who has held this product. M–F, 6 AM – 5 PM Pacific. (866) 469-8556

The big boxes don't care if your hardware store survives.

Amazon, Home Depot, and Lowe's are built to pull every hardware dollar out of your town. When the local shop can't keep the lights on, the counter where somebody actually knew which part you needed goes with it. We're built the other way: real brands so you're never stuck on a marketplace, and a straight answer to buy it down the street when that's the better call. Support independent hardware — it doesn't restock itself.

Why we tell you to shop local
Authorized dealer · Dap

Or skip the tabs entirely and buy it down the street. Find a store near you →

Shop Local · Support Independent

Every order helps keep your local hardware store on the corner.

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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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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