Permatex Flowable Silicone Windshield Sealer, 1.5 oz (12-pack) vs 3M Auto Glass Urethane Windshield Adhesive, Medium Viscosity, 310 mL/10.5 fl oz (2-pack)
Overall winner: 3M Auto Glass Urethane Windshield Adhesive, Medium Viscosity, 310 mL/10.5 fl oz (2-pack)
Key Differences
3M (A) is a medium-viscosity urethane adhesive designed for high bond strength and fast curing for windshield attachment, while Permatex (B) is a flowable silicone sealer sold in small 1.5 oz units focused on waterproofing and a clear finish. Choose 3M if you need a high-strength windshield bonding urethane with non-sag medium viscosity; choose Permatex if you want a clear, flowable silicone sealer for weatherproofing or bead-filling tasks
Permatex Flowable Silicone Windshield Sealer, 1.5 oz (12-pack)
Flowable silicone sealer for windshield and glass; forms a tough, waterproof, clear seal. Customers note its ease of application and effectiveness on older vehicles and convertible windows
Pros
- tough waterproof seal
- clear finish
- ease of application
- works on older vehicles
Cons
- mixed reviews on flowability
- mixed reviews on filling capacity
- mixed value-for-money perception
3M Auto Glass Urethane Windshield Adhesive, Medium Viscosity, 310 mL/10.5 fl oz (2-pack)
Medium viscosity, fast-curing windshield adhesive designed for high-strength bonds and easy application. Customers note easy application and good sealability, with mixed feedback on curing speed
Pros
- Medium viscosity, non-sag formula
- Fast-curing adhesive
- High bond strength for windshield attachment
- Easy and clean application
Cons
- Nozzle may be missing according to customer feedback
- Curing speed perceived as variable by users
Head-to-Head
| Criteria | Winner |
|---|---|
| Price | 3M |
| Durability | 3M |
| Versatility | Permatex |
| User Reviews | 3M |