Description
Davco Lanko 752 Bondit is a white PVA emulsion that does three jobs on site: it works as a mortar additive, a primer and a sealer, and it can also bond timber to timber. This 5L pack suits renderers, tilers, concrete patchers and joiners who want one economical product for strengthening cement-based work. Mixed into sand and cement mixes, it lifts adhesion, flexibility, tensile strength and impact resistance. It also improves the flexural and compressive strength of the mortar.
About the formula
Bondit is a PVA-based emulsion supplied ready to use, and you add it to your mix or dilute it with water depending on the job. Beyond strengthening mortars, it can be thinned and applied to concrete to prime, dustproof and seal the surface. Used neat, it can also be applied to timber joints as a PVA wood bond.
Where to use it
Mortar additive: sand and cement mixes for concrete patching and for rendering, and mortars for tiling over concrete, render, blockwork and rendered brickwork.
Bonding slurry: mixed into neat cement to bond new sand and cement toppings onto concrete.
Primer and sealer: diluted with water and brushed or rolled onto concrete to prime, dustproof and seal.
Joinery: applied neat to bond timber to timber.
Suitable surfaces include concrete, render, blockwork, rendered brickwork and timber. Very porous surfaces should be primed with Bondit first. Always test for suitability on a small area before starting the full job.
How to use it
Surfaces should be dry, structurally sound and clean, and free of dust, dirt, wax, oil, grease, paint, adhesives and other contaminants. New concrete needs to cure for six weeks and have a wood float finish. Steel-trowelled concrete should be acid etched or wire brushed before tiling. New render should cure for at least 7 days.
As a mortar additive, the manufacturer's guide is approximately 750 mL to 1 L of Bondit, plus the required water, for each 20 kg of sand and cement mix.
As a primer, dilute with water and apply by brush or roller. Expect roughly 6 to 8 m² per litre when diluted.
For joinery, apply neat by brush or roller. Expect roughly 3.5 m² per litre, depending on surface porosity and site conditions.
Important notes
Do not use Bondit in temperatures above 40°C or below 5°C.
It is not suitable for permanently wet or damp areas such as swimming pools and spas. For those installations, the manufacturer recommends Davco Lanko 751 Lankolatex instead.
Coverage figures are approximate and vary with surface porosity and site conditions.
Store in the original, unopened and undamaged packaging in dry conditions between 4°C and 35°C. Shelf life is 12 months.
Specifications
| Brand |
Davco (Lanko range) |
| Product |
Lanko 752 Bondit PVA Additive |
| Pack |
5L |
| Colour |
White |
| Base |
PVA (polyvinyl acetate) emulsion |
| Application |
Mixed into mortar, or applied by brush or roller |
| Coverage (neat, joinery) |
Approximately 3.5 m² per litre |
| Coverage (diluted, priming) |
Approximately 6 to 8 m² per litre |
| Mortar dosage |
Approximately 750 mL to 1 L per 20 kg sand and cement mix |
| Application temperature |
5°C to 40°C |
| Shelf life |
12 months, unopened |
| Storage |
Dry, 4°C to 35°C, original sealed packaging |
Safety
Use with adequate ventilation, and wear chemical-resistant gloves when handling. Do not eat, drink or smoke while using it, and follow standard hygiene practice. Keep the container tightly closed in a dry, well-ventilated place. Refer to the Safety Data Sheet (SDS) for full details.
