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New vapour barrier reduces risk of debonding

by Madelein
New vapour barrier reduces risk of debonding

A new product specially designed to create a chemical barrier that eliminates out-gassing of concrete and screed, thereby reducing moisture vapour emission rates (MVER), has just been made available locally.

TAL, a division of Norcros SA, has launched a fast-curing water-based moisture and vapour barrier for use on high moisture concrete and screeded substrates. “When residual moisture levels or high moisture vapour emission rates exceed the permissible limits stipulated by the manufacturer of the selected floor covering (typically 3-3.5% moisture content), the application of TAL Vapourscreen WB prior to the flooring installation, reduces the risk of debonding,” says Sharon Margon, TAL Technical Advice Supervisor.

Fast curing formulation

Surface preparation is a vital aspect of any flooring application. Inadequate preparation may easily lead to loss of adhesion and ultimately failure of the flooring installation, for example, vinyl flooring “bubbling” or delaminating from the substrate.

TAL Vapourscreen WB is a moisture-tolerant, two-component water-based epoxy moisture and vapour barrier. The product sets within 2 hours, depending on site and ambient conditions. Once cured, it produces a high crosslinking density barrier coat which is fully compatible with TAL’s range of priming agents and flooring systems. TAL Vapourscreen WB is offered in 2.5L and 5L kits.

“Our fast-curing formulation means that follow-on coverings of TAL Primercoat and TAL Screedmaster can be applied the same day, thus reducing the overall installation time,” concludes Margon.

For more information, contact the TAL Technical Advice Centre:
Tel: +27 11 206 9876
Email: taltech@tal.co.za
Website: www.tal.co.za

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