BLOCK P550 Boscoseal PUW
WATER-BASED MODIFIED BITUMEN-POLYURETHANE LIQUID-APPLIED WATERPROOFING MEMBRANE
Product overview
BOSTIK BLOCK P550 Boscoseal PUW is a one-part water-based modified Bitumen-Polyurethane liquid applied waterproofing membrane. After curing, it forms a tough, highly elastic, impervious barrier to moisture. Suitable for application by brush, roller or trowel.
RECOMMENDED FOR
• Masonry walls, foundations and basements
• Roof lap slabs, balconies and courtyards
• Beneath terrazzo, paving and quarry tiles
• Bathrooms, laundries and wet areas prior to tiling
• Planter boxes
BENEFITS:
• Water-based
• One component - No mixing
• Early access for following trades
• Brush, roller or trowel applied
• Does not brittle with age
• Exhibits tenacious adhesion to masonry
• Non re-emulsifying
Refer to the BLOCK P550 Boscoseal PUW TDS for application instructions and limitations.
RECOMMENDED FOR
• Masonry walls, foundations and basements
• Roof lap slabs, balconies and courtyards
• Beneath terrazzo, paving and quarry tiles
• Bathrooms, laundries and wet areas prior to tiling
• Planter boxes
BENEFITS:
• Water-based
• One component - No mixing
• Early access for following trades
• Brush, roller or trowel applied
• Does not brittle with age
• Exhibits tenacious adhesion to masonry
• Non re-emulsifying
Refer to the BLOCK P550 Boscoseal PUW TDS for application instructions and limitations.
Geographic availability
- New Zealand
Smart Advantages
One component water-based modified Bitumen-Polyurethane liquid applied waterproofing membrane
Brush, roller or trowel applied - Early access for following trades
Exhibits tenacious adhesion to masonry. Does not brittle with age.
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TDS
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Brochure
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Block P550 Boscoseal PUW PTS V1 - Feb 2025
FEATURES & BENEFITS:
- Water-based
- Solvent free
- One component
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No mixing required
- Early access for following trades
- Brush, roller or trowel applied
- Does not brittle with age
- Exhibits tenacious adhesion to masonry
- Non re-emulsifying
Related market & applications

Waterproofing
