YKF GFJ-1KG Concrete Crack Filler, 2-Pack

YKF GFJ-1KG is a two-pack liquid concrete crack filler described as self-leveling and flexible. Its small pouch format and stated suitability for cracks up to 3/4 inch point to targeted repairs rather than large-area resurfacing.

At a glance

Liquid formula is advertised as self-leveling for filling cracks in concrete and stone.
The product listing describes a flexible, rubber-like cured repair intended to accommodate ground movement.
The listing states suitability for cracks up to 3/4 inch wide and identifies driveways, garage floors, patios, and walkways as example surfaces.

Price

$23.98Save 17%

Reference price: ~~$28.88~~

Price checked: Nov 14, 2026

View offer Ahead of Black FridayExplore the selection

Often bought together

SIKA Sikacryl Ready-Mix Concrete Repair Patch, Gray, Textured, 1 qt 1-Pack | Repairs spalls and cracks in masonry, Ready-to-use acrylic formula, Durable finish, Easy cleanup and application

$9.99

Pros and cons

Pros

Two pouches provide separate portions for two repairs or a later touch-up, according to the listing.
The liquid, self-leveling format is positioned for cracks rather than broad patching or resurfacing.
Application scrapers are claimed as part of the kit.

Technical specifications

12 specifications

Identity
Brand	YKF
Model	GFJ-1KG

Dimensions and installation
Dimensions listed	4.33 x 4.33 x 7.87 inches
Weight listed	1000 g

Materials and protection
Water resistance listed	Water Resistant
Form	Liquid
Compatible materials	Concrete, Stone
Color	Gray

Pack and use
Pack style	2 Pack
Number of packs	2
Claimed crack width	cracks up to 3/4" wide
Claimed temperature range	-40°F to 180°F

What to know before buying

Listing details to confirm

Listing details are inconsistent: the title calls this a 2.2 lb bundle, feature text calls it two 1.1 lb pouches totaling 2.2 lb, while the specifications list a 1000 g item weight and 128 Fluid Ounces unit count. The explicit components list names only the two-pack filler, but feature text also claims two scrapers. Check the selected listing for the actual quantity, unit, and included tools. Claims of waterproofing, flexibility, durability, and weather performance are manufacturer statements, not independently verified results.

What’s in the box

2-pack concrete crack fillerIncluded
2 application scrapersCheck selected pack

Check which accessories are included in your selected pack before buying.

Who is it for?

A good fit for

Homeowners making limited driveway, garage-floor, patio, or walkway crack repairs.
Buyers who prefer a pourable filler advertised to self-level and flex after curing.

Less suited to

Large-area resurfacing or repairs beyond the stated crack-width guidance.
Buyers who need a clearly confirmed quantity or scraper-inclusive package without verifying the selected listing.

YKF GFJ-1KG Concrete Crack Filler, 2-Pack · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.4 / 5 · 65 ratings

5 stars66%66%
4 stars21%21%
3 stars8%8%
2 stars0%0%
1 star5%5%

Customer feedback describes the filler as effective, particularly for driveway cracks, and speaks positively about its quality. That reported experience is relevant to the listed driveway-repair use, but it does not establish performance across different crack sizes or surfaces. Aggregate ratings are generally favorable but include a smaller low-star portion, so individual results may vary.

Positive themes

Customer feedback highlights effectiveness, especially on driveway cracks.
Quality receives positive feedback.

Frequently asked questions

How many pouches are included?

The title and feature text describe two pouches, each stated as 1.1 lb, but the specifications separately list 1000 g and 128 Fluid Ounces. Confirm the selected listing’s quantity and units before ordering.

Are application scrapers included?

Feature text claims two scrapers, while the explicit included-components entry lists only the two-pack crack filler. Check the package details for the selected listing.

What crack width is it intended for?

The listing states that it is designed for cracks up to 3/4 inch wide. This is a product claim, not an independently verified application limit.

Is it suitable for stone as well as concrete?

The listed compatible materials are concrete and stone. The feature text also names several concrete surfaces, including driveways, garage floors, patios, and walkways.