Returns an even colour to felt shingles and bituminous roof coverings and seals their surface. This water-based renovating coating forms a flexible polymer film that adheres well to bitumen and bridges cracks.
Block pavingEI-25 is a restorer for bituminous roof coverings: felt shingles and roofing felt.
It seals the surface of the covering and returns an even colour to it, with good adhesion to bituminous materials and a flexible film that bridges small cracks instead of splitting with the substrate.
Before application, repair any losses, lifted sheets and failed flashings - the product renews the covering but does not replace a repair: it fixes the state it finds.
The usual reason a sealing job fails is not the product but the substrate. A sealer will not bond to a surface with grease, lime efflorescence or an old coating on it.
New paving has to season first - usually around 28 days from the date the block was made. You will find the exact time for each product in its technical data.
Before sealing the whole area, test on a patch hidden by a planter or in a corner of the patio. The same product can read differently on two batches of the same material, and on a surface with old coating left on it, it will not bond at all.
Only if you want it to. An invisible product leaves the colour alone, a wet-look sealer deepens it permanently, and a colour sealer gives it a new shade.
By how the water behaves. While it still beads on the surface, the treatment is working. Once water starts soaking in and dark patches return after rain, the protection has worn out.
No. Water occupies the pores the product is meant to enter, and stays trapped under the film. The result is often a milky bloom that cannot be removed without stripping the coat. The exceptions are the few products that tolerate slight surface dampness.
Not if you choose a penetrating product - it forms no film on the surface and does not change its grip. If the surface is already slippery, choose an anti-slip treatment rather than a sealer.
No. EI-25 is formulated for bituminous materials and adheres to those, not to absorbent concrete. For paving, use the products in the "Block paving" section.
No. The flexible film bridges small cracks, but it will not seal a roof that is no longer watertight. A leak needs roofing work - have it done before applying EI-25.
Consumption depends on how absorbent the surface is and how you apply the product.
Write to us with the area and the type of surface - we will help you work out how much you need.
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A sealer will not bond to a dirty surface. Start by cleaning it thoroughly.
