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Dap 08642 Dow Corning Black Silicone Sealant 9.8-Ounce

4.3 out of 5 stars 229 customer reviews
| 63 answered questions

Price: $8.73 & FREE Shipping on orders over $49. Details
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Black
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  • Minimal shrinkage
  • Flexible seal resists cracking, crumbling and chalking
  • Unaffected by tempreture extremes once cured
  • 10.1 ounce cartridge
  • Protect and seal with 100% silicone rubber
  • Waterproof, weatherproof, won't crack, crumble or dry out
  • Meets Fed. Spec TT-S-001543A, class A
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$8.73 & FREE Shipping on orders over $49. Details In Stock. Ships from and sold by Amazon.com. Gift-wrap available.

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This item: Dap 08642 Dow Corning Black Silicone Sealant 9.8-Ounce
Customer Rating 4 out of 5 stars (229) 4 out of 5 stars (12) 4 out of 5 stars (7) 4 out of 5 stars (310)
Price $8.73 $6.53 $7.18 $2.28
Shipping FREE Shipping FREE Shipping FREE Shipping FREE Shipping
Sold By Amazon.com Amazon.com Amazon.com Amazon.com
Color Black black Clear Clear
Dimensions 12 inches x 2 inches x 2 inches 11.5 inches x 2 inches x 2 inches 12 inches x 2 inches x 2 inches 12 inches x 2 inches x 2 inches
Item Package Weight 0.75 pounds 0.5 pounds 0.8 pounds 0.75 pounds
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Product Description

Color: Black

Product Description

100% silicone rubber sealant provides excellent durability, flexibility and adhesion for a long-lasting, waterproof seal. Cured sealant is mildew resistant. Indoor/outdoor use. Meets astm C920, specification C719, class 25. Applicable materials: glass, ceramic, fiberglass, porcelain, wood, metal, canvas, plastic and rubber. Black.

From the Manufacturer

Superior quality tub and tile sealant. Offers long-lasting flexibility and excellent adhesion. Provides a watertight seal around non-porous surfaces, such as ceramic tile and plumbing fixtures. Safe for incidental food contact. Cured sealant is mildew resistant.

Product Information

Color:Black

Technical Details

Part Number 8642
Item Weight 10.9 ounces
Product Dimensions 2 x 2 x 12 inches
California residents Click here for Proposition 65 warning
Item model number 8642
Color Black
Item Package Quantity 1

Additional Information

ASIN B0002YOVFO
Customer Reviews
4.3 out of 5 stars 229 customer reviews

4.3 out of 5 stars
Best Sellers Rank #22,057 in Home Improvements (See top 100)
#7 in Home Improvement > Building Supplies > Building Materials > Decking & Fencing > Railings & Pickets > Weatherproofing
#382 in Home Improvement > Painting Supplies & Wall Treatments > Paint, Stain & Solvents
Shipping Weight 12 ounces (View shipping rates and policies)
Date First Available July 3, 2006

Warranty & Support

Warranty, Parts:Parts

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Customer Questions & Answers

Customer Reviews

Top Customer Reviews

Color: Clear Verified Purchase
I recently purchased this item from Amazon for use in a home brewing application. My false bottom has sharp edges around it so my plan was to coat the circumference with a bead of this sealant so it didn't scratch the inside of my cooler mash tun or snag on the large nylon grain bags that I use to line the cooler while mashing. I made sure I was purchasing a food safe silicone and noted the FDA listing in the item description.

When I started applying the sealant to the false bottom I noticed a terrible chemical smell which made me question if the stuff was actually food safe. I then called the DAP help line and they told me that this part number, 08641, used to be FDA approved but they recently changed the formulation and it is no longer approved for food contact. Needless to say I am no longer comfortable using this in my application and I will probably need to replace my false bottom depending on how well it cleans up. I haven't attempted this yet.

I raised this issue with Amazon and they resolved my situation, but I don't want this or worse happen to anybody else. Hopefully they remove the FDA listing from this item description sooner than later.

I think the real issue here is why would DAP keep the same part number, packaging, and label color through a pretty serious formulation change like this? I realize that not everybody is buying this because it's rated for food contact, but it's a pretty major specification to do a 180 on without some obvious way to tell the difference.

Rating three stars because I'm sure this still works well for applications that don't require food contact.

EDIT: It looks like they finally took the FDA listing off this item page - 8/6/14
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Color: Clear Verified Purchase
I used this because I live in a building that despite fumigation and regular exterminator visit has bugs. I wanted to create a barrier wherever I could find cracks and had previously seen bugs. I thought in addition to the exterminator and every 4 month fumigation that would really help. The bugs were coming up in a gap between the tile and tub in the bathroom and in between the kitchen wall and tile along the kitchen. I applied the product in the bathroom after applying the ceramic sealant first. It dried quickly and did not have a harsh smell. In the kitchen I applied it directly to the area. It does attract debris because it is rubbery but the good news is that I can mop over it and it gets clean without removing the product off the area. It is also easy to remove from your hands or to clean away for neatness where you don't want it. I also used this to seal up a window in the building hallway where alot of people where hanging out and making into a smoking area and keeping me up at night (don't tell my apt). I put the seal on at 1am and it was dry by morning and no one has been able to open that window since even after it rained for 2 weeks straight.
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Color: Clear Verified Purchase
The product description recommends it as a tub and shower sealant - which I'm sure it would be great for but I purchased this for 3 other needs:

1) Wooden window frame - The wood frame on the window in my bathroom has pulled slightly away from the base at the bottom. I had some small bugs sneaking through there. I sealed it with this product and it worked great, even in cold weather (down to about 10F for a few days).

2) Kitchen Faucet Seal - I replaced my kitchen sink's faucet and wanted to add a sealant around the stainless steal base and sink. This worked like a charm and because it's clear it doesn't stand out at all.

3) Kitchen Counter Top - I scraped away the old sealant that was around the base and the metal ends on my kitchen counters, and this sealant made for a great replacement. It's also food safe so no concerns there - a big plus for me.

Note that this review is for the clear version of the product, someone else had a complaint about a colored sealant which this is not.

Also note that the sealant isn't very firm or hard, it's flexible which for me is the best. However, it can be slightly tacky and collect dust or debris, but a wet cloth handles that as quick and easily as anything else.

Highly recommended.

-D
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Color: Clear Verified Purchase
My application or need was for food-contact safe (aka "pure") silicone. This fits the bill same as the more expensive "aquarium" silicone. Remember, you want additive free silicone for a food application.. you shouldn't use anything that promises to be mold-free (as that indicates presence of some non-foodsafe fungicide additive)

What I needed to do was seal up the rim area of a "vittles vault" food container, which I use for liquids (homebrewed beer fermentation). Around the inside of the lid area, there are some crevices. The beer does not normally come into contact with this (siphon in, siphon out), but when I would dump out the "trub" solids during post-use cleaning, bits of trub would get stuck in those crevices, lengthening my cleanup effort.

I am not sure I would use this anywhere that the beer would remain in constant contact (but doing so may be OK), but for above the "waterline" sealing this is great.

As for other reviews of this item, read carefully the product description to see if it matches. Mine was clear silicone, which matches the product description. Another reviewer noted their silicone was black in color. Amazon sometimes recycles existing reviews onto similar products. The item I received was the "Dap 08641 Dow Corning Clear Silicone Sealant 10.1-Ounce".
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