Hairline Crack Sealer by GetSet2Save INSTANTLY FILL IN CRACKS! - Fix hairline cracks the easy way with EZR Hairline Crack Sealer! Dont spend hundreds of dollars on plumbersfix those mystery leaks the easy way! Works on sidewalks, stairs, floors, walls. Crack filler is super strong and easy to use. SUPER THIN, SUPER FAST, & SUPER EASY! - Sun-resistant formula is quick and easy to apply and dries fast and clear. Super-thin formula flows into the tiniest crevices, allowing it to seek out the source of cracks and seal them all the way up. LEAVES BEHIND A CLEAR SEAL - This penetrating water based sealant is formulated to be so thin that it finds its way inside fine cracks by capillary action and sets to a clear flexible seal. MULTI-SURFACE APPROVED - Works perfect for cracks in drywalls, concrete, sidewalks, stairs, floors, walls, flower pots, window sills, porcelain, driveway, asphalt and more. Perfect for all those cracks around the house that need a fixer upper. Manufactured in the USA. Safe to use. No harsh chemicals.