MasterSeal NP1 Stone polyurethane sealant (12-pack) with AWF PRO gloves
Moisture-cured polyurethane sealant with strong adhesion across construction materials. Flexible, non-sag, and suitable for joints with movement; can be painted and used in wet areas. Customer note: durable sealant quality and value, though some report drying issues
Highlights
- premier grade moisture-cured polyurethane
- no primer needed adhesion
- accommodates joint movement and weathering
Pros
- high flexibility with joint movement ±35%
- water immersion suitable and can be painted
- acoustical sealant for STC improvements
- includes protective gloves
Cons
- some customers report it dries out over time
Best For
Features
- Moisture-cured polyurethane sealant with strong adhesion to most materials without primer
- Flexible elastomeric sealant with +/- 35% joint movement capability and wide temp range
- Suitable for joints 1/4 inch to 1/2 inch deep and compatible with painted finishes
- Can be used as an acoustical sealant to improve STC and reduce sound transfer
- UL listed with 4-hour fire/hose stream test when used with compatible substrates
