Black Swan Plumbers Putty - 15lbs, crack-resistant, stay soft vs Flex Seal MAX 17 oz (2-pack) Black sealant coating
Overall winner: Flex Seal MAX 17 oz (2-pack) Black sealant coating
Key Differences
Flex Seal MAX (A) is a spray-on, waterproof sealant with paintable, watertight finish and a much larger review count; Black Swan (B) is a stay-soft plumbers' putty designed for drain and fixture seals. Choose Flex Seal if you need a sprayable, paintable roof/roof-repair style sealant and broader user feedback; choose Black Swan if you need a pliable putty for plumbing seals around drains and fixtures
Black Swan Plumbers Putty - 15lbs, crack-resistant, stay soft
White plumber putty for sealing sinks, drains and fixtures with a stay-soft formula. Customers note good sealability and ease of use, though some report cracking lids and variable softness
Pros
- stay-soft formula for pliability
- effective waterproof sealant
- versatile use for bowls, fixtures, faucets
Cons
- lid quality issues reported
- mixed softness and durability depending on user
Flex Seal MAX 17 oz (2-pack) Black sealant coating
Waterproof rubber spray-on sealant that seeps into cracks and holes and dries watertight. Can be painted after drying; easy to coat, seal, and protect. Customers note easy application and effective sealing in some cases, with mixed views on value and durability
Pros
- easy-to-apply sealant
- dries watertight
- can be painted after drying
- seeps into cracks and holes
Cons
- mixed durability reports
- mixed spray quality and mechanism issues
- mixed leak prevention results
Head-to-Head
| Criteria | Winner |
|---|---|
| Price | Black Swan |
| Durability | Flex Seal |
| Versatility | Flex Seal |
| User Reviews | Flex Seal |