Planiseal 88 (Formerly Idrosilex Pronto) - Cementitious Waterproof Slurry

Cementitious Waterproof Slurry for Concrete and Masonry Structures

Planiseal 88, formerly known as Idrosilex Pronto, is a high-performance, single-component cementitious waterproofing slurry used for protecting and waterproofing masonry and concrete surfaces. Applied by brush or trowel, Planiseal 88 forms a rigid barrier that resists water under both positive and negative pressure. It is ideal for waterproofing basements, cellars, lift pits, retaining walls, tanks, and other below-ground or water-retaining structures.

Key Features & Benefits

• Waterproofs Under Pressure: Resists water penetration from both the positive and negative sides of the substrate.
• Easy to Apply: Pre-blended powder – just mix with water and apply by brush or trowel.
• Strong Adhesion: Bonds well to concrete, brick, and masonry without needing a primer.
• Breathable Finish: Allows water vapour transmission while blocking water ingress.
• Rebrand Notice: Planiseal 88 is the new name for Mapei Idrosilex Pronto – same trusted formula with updated branding.

Product Details

• Type: Single-component cementitious waterproofing slurry
• Form: Pre-blended grey powder
• Application Method: Brush or trowel
• Substrates: Concrete, brickwork, blockwork, render
• Coverage: Approx. 2 kg/m² per 2-coat application
• Packaging: 25kg bag
• SKU: PLAN88

Application Instructions

1. Surface Preparation: Clean substrate thoroughly, removing dust, grease, and loose material. Dampen the surface before application.
2. Mixing: Add clean water to the powder while mixing to form a smooth, lump-free slurry.
3. Apply First Coat: Brush or trowel onto the prepared surface, ensuring even coverage.
4. Apply Second Coat: After the first coat has cured (typically 4–6 hours), apply a second coat perpendicular to the first.
5. Curing: Protect from rapid drying, rain, and frost during curing. Allow at least 7 days before exposing to full water pressure.

Limitations

• Not suitable for flexible waterproofing requirements — forms a rigid coating.
• Do not apply below 5°C or onto frozen or saturated surfaces.

Health & Safety

Contains cement – wear gloves, dust mask, and goggles. Avoid skin and eye contact and ensure adequate ventilation. Refer to the Safety Data Sheet (SDS) for detailed handling instructions.