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. Surface Preparation: Clean substrate thoroughly, removing dust, grease, and loose material. Dampen the surface before application.. Mixing: Add clean water to the powder while mixing to form a smooth, lump-free slurry.. Apply First Coat: Brush or trowel onto the prepared surface, ensuring even coverage.. Apply Second Coat: After the first coat has cured (typically 4–6 hours), apply a second coat perpendicular to the first.. 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.