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1 Gal. Siliconizer White Elastomeric Crack Filler Smooth Knife Grade for Permanent Water Resistant Adhesion

  • A flexible mastic that will adhere to any surface and fill cracks
  • Permanent water resistant adhesion, stops leaks & seals cracks.
  • For: concrete, metal, wood, asphalt, polyurethane
  • See More Details

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Product Overview

Siliconizer™ Crack Filler Is a 100% elastomeric, styrene/acrylic, silicone modified white mastic for interior and exterior use. Will permanently seal leaks and bridge cracks on smooth surfaces. A flexible mastic that will adhere to any surface and fill cracks of any size. Will not crack, peel or crumble even after exposure to severe weather conditions.
  • Seals cracks and leaks
  • Available for trowel application
  • For use with or without reinforcing fabric fiberglass
  • UV and mildew resistant
  • Can be painted
  • Smooth finish
  • Coverage: 1 Gal. covers 994 sq. ft. at 1 mils 1 Gal. cover 50 sq. ft. (4.7 m) at 30 thick mils
  • Drying time: 12-15 minutes to touch, 2-4 hours to recoat (79˚F (26˚C) and 85% RH)
  • To seal cracks and leaks
  • 100% elastomeric
  • Made in the USA
  • California residents

Info & Guides

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Price
Ratings
(270)
(120)
(1349)
(666)
Application MethodTrowelBrush On,TrowelCaulk Gun/Dispenser,TrowelCaulk Gun/Dispenser,Trowel
FeaturesAlgae Resistant,Corrosion Resistant,Extreme Cold & Ice,Extreme Heat,Mildew Resistant,Rust Resistant,Water Resistant,WaterproofWater Resistant,WaterproofAlgae Resistant,Corrosion Resistant,Extreme Cold & Ice,Extreme Heat,High Impact/Hail Resistant,High Wind Resistant,Impact Resistant,Mildew Resistant,Paintable,Rust Resistant,Water Resistant,WaterproofAlgae Resistant,Corrosion Resistant,Extreme Cold & Ice,Extreme Heat,High Impact/Hail Resistant,High Wind Resistant,Impact Resistant,Mildew Resistant,Paintable,Rust Resistant,Water Resistant,Waterproof
Roofing Product TypeSealantRoofing RepairSealantSealant
Roof Repair TypeSBSAcrylicRoof SealantRoof Sealant
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Specifications

Dimensions

Container Size
1 Gallon
Product Depth (in.)
7.35
Product Height (in.)
7.5
Product Size (oz.)
128
Product Width (in.)
7.35

Details

Application Method
Brush On,Trowel
Coating Base
Acrylic
Cold Applied
Cold Applied
Color Family
White
Color/Finish
White
Features
Water Resistant,Waterproof
Returnable
90-Day
Roof Repair Type
Acrylic
Roofing Product Type
Roofing Repair

Warranty / Certifications

Manufacturer Warranty
Satisfaction Guaranteed

Questions & Answers

37Questions14Answers

Can I use this to fill in a dip where water is ponding? I have a painted plywood deck.

Asked by Stan March 13, 2021
2
Answers

I would say yes. Make sure it will not rain for 48 hours at least. Then you can paint it. Wait longer than the instructions say.

Can this product be applied on a flat roof (zero slope) with modified bitumen that is covered by ...

Asked by Rick February 16, 2021
1
Answer

Hi Rick, no you cannot use the Siliconizer White Elastomeric Crack Filler on modified bitumen covered by 100% silicone. The reason is because the Crack Filler is acrylic and your roof is silicone.

Can this product be used on thin fissures on concrete roof tiles and flat roof (modified Bitumen)?

Asked by Rick February 16, 2021
1
Answer

Hi Rick, yes you can use the Siliconizer White Elastomeric Crack Filler on concrete roof tiles and on a flat roof that is modified Bitumen, you can even use on drywall, wood and metal , but no silicone.

Can I use this to seal the bottom of a cinder block wall to keep it from leaking

Asked by Shy February 12, 2021
1
Answer

Hi Shy, yes you can use the Siliconizer White Elastomeric Crack Filler Smooth Knife Grade to seal the bottom of a cinder block wall to keep it from leaking, but if it is too deep you need to apply two coats. The first as a base coat, let dry for 24 hours and then the second coat to finish.

Can you dilute this product down for brushing?

Asked by justintyme October 12, 2020
2
Answers

Used it on my roof, It's elastomeric, so NO I don't think it should be watered down.

What kind of brush to use to apply this? Also, can it be rolled on?

Asked by Susan72 October 9, 2020
1
Answer

Hi Susan72, the Lanco Siliconizer Crack Filler is a 100% elastomeric acrylic, silicone-modified mastic, white and smooth for knife application.

Can I use this on the chimney to fix cracks where the bricks are cracking

Asked by Allen October 5, 2020
1
Answer

Hello Allen, the Lanco Siliconizer Crack Filler Is a 100% elastomeric acrylic silicone modified white mastic for interior and exterior applications. The Siliconizer Crack Filler will permanently seal leaks and bridge cracks on smooth surfaces. It is made of a flexible mastic that will adhere to any surface and fill cracks of any size. The chemical composition of the Siliconizer Crack Filler will never crack, peel or crumble even after exposure to extreme weather conditions.

can i use this for over head repairs

Asked by peewee September 1, 2020
3
Answers

Should be used on a vertical surface or floor,roof it would sag or droop before it set up

Does this dry hard or is it flexible?

Asked by Zac August 30, 2020
1
Answer

Hi Zac, the Lanco Siliconizer Crack Filler is an elastomeric mastic that is perfectly formulated to stretch and retract. It all depends on the changes in the weather and temperature.

Can this be used as chimney crown sealer?

Asked by Matt August 29, 2020
1
Answer

Hi Matt, The Lanco Siliconizer Crack Filler is a 100% elastomeric, styrene/acrylic, silicone modified white mastic for interior and exterior use. This product will permanently seal leaks and bridge cracks on smooth surfaces. This flexible mastic will adhere to any surface and fill cracks of any size. It does not crack, peel or crumble even after exposure to severe weather conditions.

1 Gal. Siliconizer White Elastomeric Crack Filler Smooth Knife Grade for Permanent Water Resistant Adhesion - page 2

Customer Reviews

  • 4.7
    out of 120 reviews
  • 90% recommend this product
Filter by:
Showing 1-10 of 120 reviews
I used this to patch a pool. So far, so...
I used this to patch a pool. So far, so good!
by HomeDepotCustomer
Had to apply several coats as it shrunk ...
Had to apply several coats as it shrunk
by Guz
Response from Lanco Product ExpertApr 8, 2020
Hi Guz, thanks for sharing your feedback, we apologize that our product did not satisfy your expectations. Our support team is always ready to help customers with any situation regarding our products, please do not hesitate to reach out to us.
(786) 495-5944
2 people found this helpful
Applied the Siliconizer as instructed. Now hoping for energy savings and a more leak proof roof....
Applied the Siliconizer as instructed. Now hoping for energy savings and a more leak proof roof. Thought the stuff was on the expensive side at $89.99 for a 5 Gallons Bucket.
by Dirksen
3 people found this helpful
Rating provided by a verified purchaser...
Rating provided by a verified purchaser
by HomeDepotCustomer
a lot better than I expected...
a lot better than I expected
by SILVIA
by HomeDepotCustomer
Worked fine. Was compatible with roof coating that I used....
Worked fine. Was compatible with roof coating that I used. Basically, it seemed to be siliconized chalk in a bucket.
by Steve
It worked perfectly for sealing the edges of my roof...
It worked perfectly for sealing the edges of my roof
by HomeDepotCustomer
Rating provided by a verified purchaser...
Rating provided by a verified purchaser
by HomeDepotCustomer
Rating provided by a verified purchaser...
Rating provided by a verified purchaser
by HomeDepotCustomer
Showing 1-10 of 120 reviews