Yes — always. New concrete is porous and carries surface dust that prevents waterproofing coatings from bonding properly. Applying a waterproofing system directly to an unprimed slab bonds to the weak surface layer, not the concrete itself, and delamination is inevitable. Penetrar eliminates this by penetrating and hardening the substrate before any waterproofing is applied.
On severely dusty or porous concrete, dilute Penetrar 1:7 with water and apply up to six coats, allowing each coat to absorb before the next. Continue until no further dustiness or looseness appears. On sound, lightly porous concrete, one to two coats at a 1:3 dilution is typically sufficient. The number of coats is always at the applicator's discretion.
Yes. Penetrar is used as the preparation step in the SealPro Tile Roof Ridge Waterproofing system after ridge repairs are completed with fibre cement. It primes the cured repair before the StretchSeal Membrane and HydroSeal HF waterproofing layers are applied, ensuring full adhesion of the system to the repaired substrate.
Inferior plaster work will be enhanced and strengthened by applying Penetrar. The number of layers and the dilution ratio will be at the discretion of the applicator. It is vital that proper penetration is achieved and that Penetrar does not film form over the substrate.
Yes. Penetrar consolidates and binds repaired or patched plaster, render, and screed sections before primer and paint are applied. It strengthens the repaired substrate, eliminates surface weakness, and prevents the paint delamination that commonly occurs over unprimed repair sections. It also prevents air bubbles from causing pin-holes in the applied paint film.
Standard PVA bonding agents form a film over the surface and re-emulsify when wet, making them unsuitable as primers beneath waterproofing systems. Penetrar works through capillary action, penetrating deep into the substrate to bind it from within. It will not re-emulsify, hardens the substrate, prevents outgassing and pin-holes, and is specifically formulated for use beneath waterproofing and paint systems on exterior and interior cementitious surfaces.
Yes. Penetrar is water-based, non-flammable, virtually odourless, and has a VOC content of less than 1%. It contains no toxic solvents or harmful chemicals and is safe for use on occupied residential and commercial sites with no special ventilation requirements.
Using Penetrar on concrete proves successful to enhance strength and increasing the adhesion capability of the waterproofing or paint system.
Penetrar can be diluted with water up to 7 times, but what needs to be taken into consideration is the layer for layer application. Up to 6 applications of this mixture might be needed. It will be at the discretion of the applicator at what point the substrate has properly bonded and no further dustiness appears. This dilution has been tested vigorously on concrete surfaces that are dense or extremely powdery with great success.
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