Design Criteria
Vetotop EC698 is designed to be a hard wearing two coat application on cementitious substrates. The applied product will be resistant to water as well as a wide range of chemicals.
Priming
If concrete surface is porous, or w/c ratio is >0.5 it is recommended to use Vetoprime EP691 as a film-forming primer or EP490 as a penetrating primer for porous substrates.
Vetoprime EP691 should be mixed in the proportions supplied. Add the entire contents of the hardener can to the base can. When thoroughly mixed, preferably using a slow speed mixer, the primer should be applied in a thin, continuous film using rollers or stiff brushes. Work the primer well into the surface of the concrete taking care to avoid ponding or over application. The primer should be left to achieve a tack-free condition before applying the top coat.
Mixing Vetotop EC698
In a separate mixing vessel, use a slow speed mixer to mix the base, hardener for 3 minutes. Mix these components in the quantities supplied taking care to ensure all containers are scraped clean. Dilution up to 8% using Veto Solvent XX600 to aid application is permitted.
Application
The application and cure temperature must be above 15°C. The first coat of Vetotop EC698 should be laid using a short haired lamb wool roller, or gauged squeegee to achieve a continuous coating. Ensure that loose hairs on the roller are removed before use. A minimum film thickness of 150 microns per coat should be applied for flooring system (this can be increased where specifications demand). The top coat can be applied in the same manner within 8 to 24 hours of the application of the top coat.
Antislip Aggregates
If the option of using Vetograin antislip aggregates has been chosen, the base coat should be dressed with the chosen antislip aggregates as soon as possible after laying of the base coat. The recommended procedure is to completely blind the base coat i.e. apply excess dressing aggregate to completely obliterate the base coating.
Alternatively, the antislip silica particles can be broadcast in a light random dressing to provide a less dense finish, or the product can be used to obtain a smooth finish by omitting the antislip aggregates.
When the base coat has reached initial cure (after 12 hours at 20°C or 5 hours at 35°C), the excess aggregate should be vacuum cleaned from the surface.
The top coat can now be applied by a short haired roller or airless spray equipment. Care should be taken to ensure that a continuous film is achieved and the rough surface caused by the aggregate is completely sealed. This topcoat must be applied within 36 hours at 20°C (15 hours at 35°C) of the application of the resin base coat.
Expansion Joints
Expansion joints in the existing substrate must be retained and continued through the Vetotop EC698 topping. Saveto have a range of joint sealants specifically designed for flooring (see Vetoflex PS781, Vetoflex PS782 and Vetoflex PS786 product data sheets).
Cleaning
Tools and equipment should be cleaned with Vetonit Solvent XX600 immediately after use.
