Surface Preparation
All surfaces must be clean, dry and free from grease.
PRIMING AND SEALING
Where the emulsion is to be used on porous substrates (old concrete, plaster, plasterboard etc.), it should be diluted 4 parts water : 1 part emulsion to seal the surface in preparation for further coating.
BONDING
EVERBUILD® 501 Universal PVA Bond can be used to bond plaster and cement renders/repair compounds.
To bond plaster, the emulsion should be used undiluted and brushed onto the surface to be plastered. Fresh plaster should be applied before the emulsion dries.
The bond strength of the plaster to the substrate meets the requirements outlined in BS5270 (Plaster bonded to glass).
To bond cementitious renders or repair compounds, two methods of use can be considered.
i) Small areas:- mix EVERBUILD® 501 Universal PVA Bond with an equal amount of water and add this to the mortar/concrete mix (the emulsion exhibits excellent compatibility with cement).
When added to a concrete/mortar mix, EVERBUILD® 501 Universal PVA Bond will improve adhesion and also flexural strength of the cured concrete in a similar way to conventional PVA bonding agents.
ii) Larger areas:- dilute the emulsion, 3 parts emulsion : 1 part water and brush onto the surface to be coated/repaired. Apply a normal concrete mix before the emulsion dries.
WOODWORKING
EVERBUILD® 501 Universal PVA Bond will bond wood in similar fashion to conventional bonding agents.
The emulsion should be used neat in woodworking applications. In laboratory test, wood failure was observed in joints constructed with EVERBUILD® 501 Universal PVA Bond.
In common with conventional PVA bonding agents, EVERBUILD® 501 Universal PVA Bond should not be used for load bearing applications.