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Red Devil 0646 Masonry and Concrete Acrylic Sealant, Pack of 1, Gray

4.5 4.5 out of 5 stars 1,761 ratings
Amazon's Choice highlights highly rated, well-priced products available to ship immediately.
Amazon's Choice in Industrial Adhesives by Red Devil

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10.1 Fl Oz (Pack of 1)

Purchase options and add-ons

Material Blend
Brand Red Devil
Style Compact
Item Weight 1 Pounds
Item Dimensions LxWxH 2 x 2 x 11.25 inches

About this item

  • TEXTURED LIKE CONCRETE: Blends easily with concrete and mortar
  • SEALS CRACKS & JOINTS: Works on concrete, masonry, stone, cinder block and brick
  • WON'T STAIN OR BLEED: Mimics the look of concrete or mortar
  • EXCELLENT ADHESION: Provides a long lasting repair
  • WATER CLEAN UP: Cleans up easily with soap and water. Made in the USA

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Product details

  • Is Discontinued By Manufacturer ‏ : ‎ No
  • Product Dimensions ‏ : ‎ 2 x 2 x 11.25 inches; 1.04 Pounds
  • Item model number ‏ : ‎ 0646
  • Date First Available ‏ : ‎ September 14, 2004
  • Manufacturer ‏ : ‎ Red Devil
  • ASIN ‏ : ‎ B000NHQVRG
  • Country of Origin ‏ : ‎ China
  • Customer Reviews:
    4.5 4.5 out of 5 stars 1,761 ratings

Product Description

Product Description

Masonry and Concrete Acrylic Sealant is an acrylic compound for repairing and sealing cracks and joints in concrete, masonry stone, cinder block and brick. The gray textured finish blends easily with masonry and provides excellent outdoor durability.

From the Manufacturer

Masonry & Concrete repair. Ideal for patching cracks in steps and sidewalks or repairing mortar between bricks, stone and cinder block. Textured finish blends with mortar and provides excellent outdoor durability. Exterior use. Water clean up


From the manufacturer


10.1 fl oz (300ml). Color - Gray

Since 1872

Building America's most asked for tools and chemical products. Quality, dependability and innovation - guaranteeing that America's latest generation of professional contractors and do-it-yourselfers will continue to depend on RED DEVIL products for years to come.

Red Devil Masonry and Concrete Repair

Textured Acrylic Sealant

Ideal for patching cracks in steps and sidewalks or repairing mortar between bricks, stone, and cinder block. Textured finish blends with mortar and provides excellent outdoor durability. Exterior use. Water clean up.

  • Adheres to Concrete, Cinder Block, Stucco, Stone, Mortar, Brick, Aluminum, Wood
  • Use on Steps, Sidewalks, Mortar Joints, Stucco Walls, Patios, Thresholds
Red Devil Masonry and Concrete Acrylic Sealant Red Devil Blacktop & Roof Repair Red Devil Gutter & Foundation Sealant Red Devil Fireplace & Stove Repair Sealant Red Devil Polyurethane Blacktop & Roof Sealant Red Devil Polyurethane Masonry & Concrete Sealant
Customer Reviews
4.5 out of 5 stars
1,761
4.4 out of 5 stars
229
3.6 out of 5 stars
27
4.2 out of 5 stars
333
3.9 out of 5 stars
65
3.6 out of 5 stars
15
Applications Ideal for patching cracks in steps & sidewalks or repairing mortar between bricks, stone, & cinder block. Textured finish blends with mortar & provides excellent outdoor durability Asphalt sealant, provides durable, flexible, weather-resistant seal for cracks & joints in asphalt driveways, as well as roofs, shingles, flashings. Wet or dry surfaces. Butyl rubber, water-tight. Ideal for concrete foundations and expansion joints on gutters and in below-grade areas such as basements. Silicate textured cement sets rock-hard when fired. Adheres to fire brick, cinder block, metal & mortar. Cures with a warm fire and provides durable seal up to 1000˚ F. Premium-grade permanent flexibility for dynamically moving joints. Extraordinary adhesion & resistance to deterioration for up to 50 years. Helps prevent ice and water damage caused by severe weather. Premium-grade permanent flexibility for dynamically moving joints. Textured to simulate concrete. Excellent durability & adhesion. Paintable and non-staining.
Colors Gray Black White, Gray Black Black Limestone
Clean Up Water Solvent Solvent Water Solvent Solvent
Red Devil STORMGUARD 920 100% RTV Silicone Red Devil Foam & Fill Large Gaps & Cracks Red Devil 1.5-Inch Flex Putty Knife Red Devil SLAMSCRAPER Impact Tool Red Devil Lifetime Ultra Premium Acrylic Latex Sealant Red Devil Scrape & Pry Bar
Customer Reviews
4.5 out of 5 stars
993
4.2 out of 5 stars
2,869
4.6 out of 5 stars
1,735
4.1 out of 5 stars
74
4.4 out of 5 stars
2,260
4.6 out of 5 stars
536
More Red Devil Products Window & door sealant, exceeds highest test method for joint expansion. Can be exposed to rain after 30 minutes. Excellent adhesion, flexibility & durability. For a variety of surfaces Triple Expanding Polyurethane Sealant is quick and easy to use. It expands to fill holes, cracks, gaps and voids around windows, doors, pipes, outlets, vents & foundations. High-carbon steel blade is rust resistant and extends through the sturdy solvent-resistant handle for spreading or scraping strength and long life. Quickly & easily remove roofing, tile, linoleum, carpet, & other adhesive coverings. Sturdy impact handle creates "hammer & chisel" effect. Great for icy driveways & sidewalks! Multi-purpose. High performance, maximum durability on a variety of surfaces. Excellent paintability. For professional and general use. Multi-purpose tool for pulling nails, scraping paint and opening boxes. Chisel edge on both ends.

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Customer reviews

4.5 out of 5 stars
4.5 out of 5
1,761 global ratings

Customers say

Customers like the quality and ease of use of the sealant. For example, they say it works great for fixing mortar cracks and seams, and is easy to apply. Customers are also impresseded with the value, seal quality, and consistency. That said, opinions are mixed on color, drying time, and texture.

AI-generated from the text of customer reviews

78 customers mention60 positive18 negative

Customers like the quality of the sealant. For example, they say it works great for fixing mortar cracks, filling seams, and repairing concrete. Customers are also impresseded with the application and color of the product. They say it's good for very small repairs and a great value.

"This stuff works. Pretty awesome." Read more

"Works great & dries fast. It can be used on vertical cracks, too since it's not runny & has a sandy consistency." Read more

"...Worked great and stopped the spreading of the crack. The color is slightly different than cement. But it seems to be blending in as time goes by...." Read more

"This stuff is unbelievable. I used it on some deep cracks in my basement floor...." Read more

40 customers mention35 positive5 negative

Customers find the sealant easy to apply. They mention it does the job and they're pleased with the application.

"...Overall, was pleased at the application, sealing properties, color, and texture. Will see how it holds up through the Winter, but so far so good." Read more

"...But it seems to be blending in as time goes by. Very easy to use with a regular caulk gun...." Read more

"The product caulks well, easy to work with, appearance color match is good. I used this for the new blocks for my flagpole foundation...." Read more

"easy to use and seems to be holding up just fine." Read more

14 customers mention14 positive0 negative

Customers appreciate the value of the sealant. They mention it's a cheap product that works on small projects and is good value for money.

"Great value. Just as good as any other, and much cheaper." Read more

"...I would only buy this on in the future. And the price is better than others too. Very satisfied." Read more

"Great product at a great price. I used it on an outside foundation crack and product worked great...." Read more

"...Was easy to use and the price was right." Read more

12 customers mention9 positive3 negative

Customers like the sealant quality. They mention that it works well, is easy to apply, and is compatible with other sealants.

"...Overall, was pleased at the application, sealing properties, color, and texture. Will see how it holds up through the Winter, but so far so good." Read more

"...It sealed them up very nicely...." Read more

"PRODUCT IS EASY TO USE AND COMPATIBLE WITH OTHER SEALANTS I'VE USED. I ASSUME THAT IT WILL BE ALSO DURABLE AS OTHERS AS WELL...." Read more

"Sealed floor of shop. Worked great!" Read more

10 customers mention10 positive0 negative

Customers like the consistency of the sealant. For example, they mention it's thick enough to stay in place, holds well, and is easy to work with. Some say that it'd be better suited for larger projects. That said, most are happy with the product's consistency and durability.

"...matched the sandy masonry for the bricks and provided good adhesion to the bricks and masonry...." Read more

"...The texture is still a bit pliable but it is holding well. Test of time will tell." Read more

"It is thick and tacky and seems like it will work well...." Read more

"...Initially, this caulking has a similar color, texture and consistency but there the benefits end...." Read more

24 customers mention16 positive8 negative

Customers are mixed about the color of the sealant. Some mention that it matches concrete color very well, while others say that it's not a good color and is slightly different than cement.

"...Overall, was pleased at the application, sealing properties, color, and texture. Will see how it holds up through the Winter, but so far so good." Read more

"The product caulks well, easy to work with, appearance color match is good. I used this for the new blocks for my flagpole foundation...." Read more

"...The color is slightly different than cement. But it seems to be blending in as time goes by. Very easy to use with a regular caulk gun...." Read more

"...Filled cracks in wall fast and east. Great product matches concrete color very well." Read more

16 customers mention10 positive6 negative

Customers are mixed about the drying time of the sealant. Some mention that it dries fast and without shrinkage, while others say that it took longer to dry than expected. The label says it takes 7 to 14 days to cure.

"Works great & dries fast. It can be used on vertical cracks, too since it's not runny & has a sandy consistency." Read more

"...The first surprise was the label - it says it takes 7 to 14 days to cure. That's a long time!..." Read more

"Was easy to use, went on well, dried great...." Read more

"...Easy to apply, dried relatively fast and has held in place thus far. Easy to paint over." Read more

15 customers mention9 positive6 negative

Customers are mixed about the texture of the sealant. Some mention that it blends in better than other sealants, has a sandy consistency, and looks like cement. However, others say that it remains soft and pliable to the touch for days before it hardens.

"...It can be used on vertical cracks, too since it's not runny & has a sandy consistency." Read more

"...The texture is still a bit pliable but it is holding well. Test of time will tell." Read more

"...was pleased at the application, sealing properties, color, and texture. Will see how it holds up through the Winter, but so far so good." Read more

"...Initially, this caulking has a similar color, texture and consistency but there the benefits end...." Read more

Never Dried Solid
3 Stars
Never Dried Solid
The product caulks well, easy to work with, appearance color match is good. I used this for the new blocks for my flagpole foundation. Only issue is that even a few weeks later it never totally dried solid. The texture is still a bit pliable but it is holding well. Test of time will tell.
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Top reviews from the United States

Reviewed in the United States on March 16, 2024
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Customer image
5.0 out of 5 stars Cracks in basement floor
Reviewed in the United States on May 18, 2023
This stuff is unbelievable. I used it on some deep cracks in my basement floor. After applying and drying, you can barely see the cracks were even there in the first place! It sealed them up very nicely. I've uploaded a video, and if you could've seen the cracks before I applied the caulk, you would be just as amazed as I am.
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Customer image
4 people found this helpful
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Reviewed in the United States on September 15, 2023
Size: 10.1 Fl Oz (Pack of 1)Verified Purchase
Customer image
3.0 out of 5 stars Never Dried Solid
Reviewed in the United States on September 15, 2023
The product caulks well, easy to work with, appearance color match is good. I used this for the new blocks for my flagpole foundation. Only issue is that even a few weeks later it never totally dried solid. The texture is still a bit pliable but it is holding well. Test of time will tell.
Images in this review
Customer image Customer image
Customer imageCustomer image
One person found this helpful
Report
Reviewed in the United States on February 24, 2024
Size: 10.1 Fl Oz (Pack of 1)Verified Purchase
Reviewed in the United States on January 25, 2024
Size: 10.1 Fl Oz (Pack of 1)Verified Purchase
One person found this helpful
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Top reviews from other countries

Coops
5.0 out of 5 stars Looks great
Reviewed in Canada on September 4, 2021
Size: 10.1 Fl Oz (Pack of 1)Verified Purchase
Mr. J. E. Hanson
5.0 out of 5 stars Easy to apply and it has a slight texture finish ...
Reviewed in the United Kingdom on September 18, 2015
Size: 10.1 Fl Oz (Pack of 1)Verified Purchase
Pablo Cafiso
5.0 out of 5 stars Looks good
Reviewed in Canada on January 2, 2023
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Firebox50
5.0 out of 5 stars just the job!
Reviewed in the United Kingdom on August 29, 2015
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Adriel Ziesemer Jr.
4.0 out of 5 stars Works great, but mind that it may take a long time to harden
Reviewed in Canada on September 14, 2020
Size: 10.1 Fl Oz (Pack of 1)Verified Purchase
4 people found this helpful
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