:: Repel Products
Click here for a comprehensive list of uses of different grades of Repel, guides to product choice and methods of use, and safety data.
Repel 54 & 64
Repel 54, the original Repel product which gained the Australian Technology Showcase Award, was developed for making concrete pipes by the Humes and Rocla spinning processes – download Making Big Pipes. Hunter Concrete experimented with every available mould release agent after they could not make their new Besser BiDi plant perform as designed. Repel 54 was the only product which worked for them, but it had to be diluted. Berryessa diluted and restabilized Repel 54 to suit Hunter Concrete, and this new product became Repel 64.
Repel 54 is still sold to customers who dilute it themselves under instructions from Berryessa. This gives a significant saving in freight costs, but the product as diluted by the customer has to be used quickly as it lacks the correct balance of flow stabilizers, suspension agents and thickeners. Also, variations in water quality at users’ sites can severely compromise performance.
Both Repel 54 and Repel 64 also work very well against plywood moulds where the applied film is allowed to dry before pouring of concrete – download Building Big Tanks and Bridges.
Repel 62 & 72
In some applications performance of Repel 54 & 64 can be inconsistant
In some applications performance of Repel 54 and 64 can be inconsistent unless the product is allowed to dry on the mould before fresh concrete is poured against the mould. Over two years Berryessa developed a new grade of Repel which could be overlain with fresh concrete immediately after coating with mould release. This is Repel 72. A concentrated form, Repel 62, is designed for dilution by the user under instructions from Berryessa. Correct dilution with good quality water can result in substantial savings in freight costs.
Repel 52
A special grade, Repel 52, was developed for spraying onto concrete plant and vehicles to protect them from overspray. Repel 52 also works successfully in the manufacture of concrete pavers and garden features using small plastic moulds.
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