Table of Contents
Introduction
“What is this sorcery?” That was our editors’ reaction to Magic Crack Filler. You brush a powder into a crack, mist it with water, and the crack practically vanishes.
How It Works
In the clip, the powder is poured over a crack in a concrete sample, brushed in until the crack is full, and the excess is swept away. Then it’s misted with water, and that’s it.
Trim-A-Slab describes Magic Crack Filler as a fine powder that fills hairline cracks in concrete. It’s activated with water, dries to the color of concrete, and can be stained or colored. Trim-A-Slab also says it has no shelf life.
What It Won’t Do
Trim-A-Slab is clear that Magic Crack Filler doesn’t reattach cracked slabs. It fills the crack and makes it practically invisible. The product FAQ also says it isn’t waterproof, though it slows water intrusion if it stays in place, and a crack that keeps moving may re-crack and need another application.
Tips from the Maker
Make sure the crack is clean and completely dry before you apply it. Mist lightly, without letting water puddle or run off. The maker also warns against applying it when temperatures are expected to drop below 50 degrees F within 48 hours. Wear a dust mask, gloves and eye protection when working with the powder.
Where to Buy
Look for the Trim-A-Slab listing for Magic Crack Filler on Amazon (affiliate, we may earn a commission). Watch out for lookalike products with similar names. See more adhesive and caulk reviews and concrete and masonry tools.
Final Thoughts
For hairline cracks in a driveway, sidewalk or patio, Magic Crack Filler is about as easy as it gets: brush, mist, done. Just remember it hides cracks; it doesn’t fix the reason they formed.
FAQ
How do you use Magic Crack Filler?
Brush the powder into a clean, dry crack until it’s full, sweep off the excess, then mist with water.
Does it repair cracked concrete?
No. Trim-A-Slab says it fills cracks and makes them practically invisible but doesn’t reattach cracked slabs.
Is it waterproof?
No, but the maker says it slows water intrusion if it stays in place.
Can it be colored?
Yes. It dries to the color of concrete and can be stained or colored.
Does it expire?
Trim-A-Slab says it has no shelf life.
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