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9900 Waterproof Outdoor Silicone Sealant

9900 Waterproof Outdoor Silicone Sealant

Best price now

$22.58at WalmartObserved at 7:07 PM

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Our take on the 9900 Waterproof Outdoor Silicone Sealant

A single-component silicone sealant in black, sold for roof and outdoor repairs. Silicone stays flexible after curing and handles sun and rain better than cheap acrylic caulk. The $22.58 price at Walmart as of November 4, 2026 is the only new price tracked, so there is no recent range to compare it against.

Best forRoof and flashing repairsSealing around vents and chimneysOutdoor jobs that see sun and rainBlack roofs and dark trim where a color match matters
Pros
  • Silicone formula stays flexible instead of cracking
  • Waterproof and rated for outdoor exposure
  • Black color blends with dark roofing and trim
  • One tube covers small repairs without buying a kit
Cons
  • One tube goes fast on large roof areas
  • Silicone will not accept paint
  • Needs a clean, dry surface to bond well
  • Only one store price tracked, so no deal history to judge

9900 Waterproof Outdoor Silicone Sealant prices at every store

  • WalmartNew

    In stockSold by BADSSS

    $22.58Observed at 7:07 PM
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9900 Waterproof Outdoor Silicone Sealant price history

Lowest price we've seen: $22.58 on Nov 5 at Walmart. Tracked across 1 store since Nov 5.

Specifications

Use
Roof
Formula
Silicone
Color
Black

Questions and answers

Is this the right sealant for a roof leak?
Yes for small gaps, seams and flashing. For a large tear or a failing membrane, a patching product made for that roof type holds up better.
Can I paint over it?
No. Silicone sealant does not take paint. If the repair will be visible and painted, use a paintable urethane or acrylic sealant instead.
How much does one tube cover?
Coverage depends on bead size. A thin bead along seams goes a long way; filling wide gaps uses a tube quickly, so buy a second tube for anything beyond small repairs.
Will it stick to a wet roof?
Most silicone sealants need a clean, dry surface. Wipe the area and wait for it to dry before applying, or the bond can fail.
Is $22.58 a good price?
It is the only new price tracked as of November 4, 2026, at Walmart, so there is no recent low or high to compare. Check the price per tube against other black roof sealants before buying several.
Where is the 9900 Waterproof Outdoor Silicone Sealant cheapest?
At Walmart, for $22.58, as of our latest check.