Lanco Siliconizer Crack Filler 1 Gal. White Elastomeric Roof Patch
Lanco Siliconizer Crack Filler 1 Gal. White Elastomeric Roof Patch
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Lanco

Lanco Siliconizer Crack Filler 1 Gal. White Elastomeric Roof Patch

70 ratings

Key item features

  • Crack Sealing: Seals cracks and leaks effectively for both interior and exterior surfaces.
  • Application Method: Available for trowel application, ensuring ease of use.
  • Reinforcement Option: Can be used with or without reinforcing fabric fiberglass.
  • Weather Resistant: UV and mildew resistant, ensuring durability in various conditions.
  • Paintable Finish: Can be painted over for a smooth and seamless finish.
  • Coverage Area: 1 Gal. covers 994 sq. ft. at 1 mils thickness or 50 sq. ft. at 30 mils thickness.
  • Quick Drying: Dries to touch in 12-15 minutes and can be recoated in 2-4 hours.
  • Durable Material: 100% elastomeric, styrene acrylic, silicone-modified white mastic that will not crack, peel, or crumble.
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Specs

Industrial sealant type, Siliconizer Crack FillerRec. use, ExteriorDry time, 15 minRec location, Indoor and OutdoorBrand, LancoColor, White

About this item

Product details

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. This flexible mastic will adhere to any surface and fill cracks of any size. It 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







     
info:
We aim to show you accurate product information. Manufacturers, suppliers and others provide what you see here, and we have not verified it.  

Specifications

Industrial sealant type

Siliconizer Crack Filler

Rec. use

Exterior

Dry time

15 min

Rec location

Indoor and Outdoor

Warnings

Customer ratings & reviews

4.3 out of 5 stars
stars
70 ratings32 reviews
Includes global ratings and reviews
How item rating is calculated
  1. 5 stars73% (51)
  2. 4 stars10% (7)
  3. 3 stars1% (1)
  4. 2 stars4% (3)
  5. 1 star11% (8)

Reviews summary

Pros

  • : Suitable for patching holes and metal trailer repairs.
  • : Offers more product for a lower price compared to similar items.
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Filtered and sorted results would be available on the new 'Customer ratings & reviews' page.
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Showing 1-3 of 32 reviews

Oct 26, 2026
Reviewer name: David
Top Reviewer
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Lanco syliconizer patch repair

works great stopped my leak near chimney flue on my foam roof..my leak was on the roof not flue so don't know if it can be used on or around flue itself.

Helpful?38KQJYQ4SPIU194997498
Oct 21, 2026
Reviewer name: Vernice
Top Reviewer
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

verified customer

great product

Helpful?38KQJYQ4SPIU194997498
Nov 10, 2026
Reviewer name: Doug
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

This is great stuff. It sticks to just about anything so it fills in cracks very well. It leaves NO shadow behind when painting over it like caulking does. However it does shrink and continues shrinking over time.

Helpful?38KQJYQ4SPIU194997498
Current price is Now $19.98
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