Red Devil Masonry and Concrete Acrylic Sealant, Gray vs Fiberglass Supply Depot 6LB Density Expanding Pour Foam (Quart Kit)
Overall winner: Red Devil Masonry and Concrete Acrylic Sealant, Gray
Key Differences
Red Devil masonry acrylic sealant (A) is a gray, easy-to-apply concrete/acrylic sealant with higher review count and stronger durability signals; choose A for sealing cracks, joints, and mortar blending. Fiberglass Supply Depot pour foam (B) is a high-density 6 lb, 2-part polyurethane kit providing buoyancy and insulation in smaller volumes (quart yields 0.375 cu ft); choose B for flotation, insulation, or structural foam needs where a pour foam is required
Red Devil Masonry and Concrete Acrylic Sealant, Gray
Acrylic sealant designed to seal cracks and joints in concrete, masonry, stone, and brick with a concrete-like texture. Easy to apply and blends with concrete or mortar; some users noted color match and drying time vary
Pros
- Blends easily with concrete and mortar
- Seals cracks and joints in multiple materials
- Texture matches concrete appearance
- Easy to apply
Cons
- Drying time varies by user
- Color match may be too light for older mortar
- Texture may be perceived as soft by some users
Fiberglass Supply Depot 6LB Density Expanding Pour Foam (Quart Kit)
Two-part polyurethane flotation foam that expands in place to add buoyancy, soundproofing, and insulation. Includes Part A and Part B; yields 0.375 cubic feet when cured. Can be laminated with polyester
Pros
- two-part polyurethane system
- expands in place for buoyancy
- potential for soundproofing and insulation
- laminates with polyester after curing
Cons
- 6 lb density may imply heaviness
- limited product data on long-term performance
- only quart kit size specified
Head-to-Head
| Criteria | Winner |
|---|---|
| Price | Fiberglass Supply Depot |
| Durability | Red Devil |
| Versatility | Red Devil |
| User Reviews | Red Devil |