Bauder LiquiTOP Waterproofing System

Primer for use on new and remedial plywood or OSB/3 (field areas only): Bauder Activator-Primer (Canister), APR01-Black.

Guidance for specification option:

Use for new and remedial Plywood / OSB/3 (Note: Plywood / OSB/3 decks will always require a carrier membrane installed prior to the LiquiTOP Waterproofing System).

Primer to be applied to the flat roof substrate that are to be covered by the Carrier Membrane.

Bauder Activator-Primer (Canister), APR01-Black:

Synthetic rubber resin-based primer, developed to provide the necessary preparation of substrates prior to the installation of self-adhesive membranes. The spray application offers improved film thickness speed of application (by up to 50% over roller applied products) and quick drying in a matter of minutes.

• Coverage: Approximately 96 g/m² (300 mm wide spray one coat, 192 g/m² two coats). Two coats may be required for very porous substrates.
• Application temperature: +5 to +30°C.
• Drying time (at 10°C): 5–10 minutes.
• Colour: Black.
• Recoat time if left exposed: Four hours.

Suitable substrates: Oriented strand board (OSB); plywood; timber; concrete; lightweight concrete or cementitious materials; metal; Bauder self-adhesive underlayers; existing asphalt and bitumen membranes; polyisocyanurate (PIR) insulation.

Non-suitable substrates: Mica finished surfaces (e.g. KSD FBS); Laminated paper-foil faced insulation; expanded polystyrene (EPS) or extruded polystyrene (XPS) insulations; BauderROCK or mineral wool insulation; BauderGLAS or cellular glass insulation; copper; thermoplastic waterproofing membranes.

Application: 

Purpose: Substrate primer to seal and prepare dry surfaces of a variety of common substrate material prior to the application of Bauder self-adhesive bitumen membranes.

Before application: All surfaces must be dry, clean and free from dust, dirt, oil, grease and loose material. 

Application method: Spray-applied to provide even and full coverage. Avoid pooling. Never attempt torching within 10 minutes of primer application, even if the surface appears dry.  

Application rate:

• 300 mm-wide spray.
• Coverage: Approx. 96 g/m².
• Two coats may be required for very porous substrates.
• Application temperature: +5 to +30°C
• Drying time: Approx. 5–10 minutes, dependent upon ambient temperature and material porosity.
• Coats: Fully bond. Allow volatiles to dry off thoroughly between coats.
• Re-application: Necessary after four hours’ exposure if waterproofing has not yet been applied, to maintain adhesion performance.

Caution: Use only outdoors in well ventilated areas or with respiratory apparatus and keep away from all sources of ignition. Take necessary precautions to avoid the solvent vapour from entering the buildings ventilation system.

Primer for use on new and remedial con/screed / existing exposed concrete deck (no existing waterproofing; field areas only): Bauder LiquiTOP General Purpose Primer.

Guidance for specification option:

LiquiTOP General Purpose Primer is a is a single-component polyurethane primer for improving the adhesion of LiquiTOP Roof Systems to various substrates such as concrete, masonry, exposed bitumen and absorbent asphalt.

Intended for use in the Bauder LiquiTOP Roof Systems. It is suitable for use in cold roof and warm roof situations for new build and refurbishment projects.

• Pack: Lift-top tin.
• Appearance: Brown liquid.
• Tin size: 5 litres.
• Cure time: 60–120 minutes.
• Application temperature: 5–30°C.
• Temperature in service: -30–100°C.
• Storage temperature: 5-25 °C (stored unopened in a dry condition)
• Shelf life: When stored correctly as detailed above, the shelf life is a minimum six months. When manufactured, the product is protected with a layer of nitrogen prior to dispatch. This ensures a storage life of six months, provided that the container is left unopened in a dry condition at a temperature of 5–30°C. The layer of nitrogen will disappear and the product will have a limited life once the container is opened. It is also important to note that carbon dioxide will be given off if water enters the container, which can cause pressurization.

Application:

• Product: Bauder LiquiTOP General Purpose Primer.
• Application method: Apply primer using a roller to upstands and details first, before applying to the primer to the main area.
• Absorbent asphalt/ exposed bitumen/ concrete: Apply primer to the whole area.
• To mineralized felt: Prime all exposed bitumen bleed.
• Application rate: 0.05–0.0625 L/m² per minute.
• Next coat / subject to stress: Can be walked upon/ next coat applied after approx. 60 minutes.

Installation is to be carried out by Bauder Approved Contractors in accordance with the specification and guidelines. Please consult the Bauder Technical Department.

Primer for use on absorbent asphalt overlay/ exposed bitumen felt overlay (field areas only): Bauder LiquiTOP General Purpose Primer.

Guidance for specification option:

LiquiTOP General Purpose Primer is a is a single-component polyurethane primer for improving the adhesion of LiquiTOP Roof Systems to various substrates such as concrete, masonry, exposed bitumen and absorbent asphalt.

Intended for use in the Bauder LiquiTOP Roof Systems. It is suitable for use in cold roof and warm roof situations for new build and refurbishment projects.

• Pack: Lift-top tin.
• Appearance: Brown liquid.
• Tin size: 5 litres.
• Cure time: 60–120 minutes.
• Application temperature: 5–30°C.
• Temperature in service: -30–100°C.
• Storage temperature: 5-25 °C (stored unopened in a dry condition)
• Shelf life: When stored correctly as detailed above, the shelf life is a minimum six months. When manufactured, the product is protected with a layer of nitrogen prior to dispatch. This ensures a storage life of six months, provided that the container is left unopened in a dry condition at a temperature of 5–30°C. The layer of nitrogen will disappear and the product will have a limited life once the container is opened. It is also important to note that carbon dioxide will be given off if water enters the container, which can cause pressurization.

Application:

• Product: Bauder LiquiTOP General Purpose Primer.
• Application method: Apply primer using a roller to upstands and details first, before applying to the primer to the main area.
• Absorbent asphalt/ exposed bitumen/ concrete: Apply primer to the whole area.
• To mineralized felt: Prime all exposed bitumen bleed.
• Application rate: 0.05–0.0625 L/m² per minute.
• Next coat / subject to stress: Can be walked upon/ next coat applied after approx. 60 minutes.

Installation is to be carried out by Bauder Approved Contractors in accordance with the specification and guidelines. Please consult the Bauder Technical Department.

Primer for use on PVC single ply overlay (field areas only): Bauder LiquiTOP PVC Primer.

Guidance for specification option:

To be primed after the upstands and details.

LiquiTOP PVC Primer is a is a single-pack polyurethane primer for PVC roofing membranes prior to installing LiquiTOP Roof Systems.

Intended for use in the Bauder LiquiTOP Roof Systems. It is suitable for use in cold roof and warm roof situations for new build and refurbishment projects.

• Pack: Lift-top tin.
• Appearance: Clear liquid.
• Tin size: 5 litres.
• Cure time: 20–60 minutes.
• Application temperature: 5–25°C.
• Temperature in service: -30–100 °C.
• Storage temperature: 5–25 °C (stored unopened in a dry condition).
• Shelf life: When stored correctly as detailed above, the shelf life is a minimum 12 months. When manufactured, the product is protected with a layer of nitrogen prior to dispatch. This ensures a storage life of 12 months, provided that the container is left unopened in a dry condition at a temperature of 5–25°C. The layer of nitrogen will disappear and the product will have a limited life once the container is opened. It is also important to note that carbon dioxide will be given off if water enters the container, which can cause pressurization.

Application:

• Product: Bauder LiquiTOP PVC Primer.
• Application method: Apply primer using a roller to upstands and details first, before applying to the main area.
• Application rate: 0.125–0.2 L/m² per minute.
• Next coat / subject to stress: Can be walked upon/next coat applied after approx. 20–60 minutes.

Primer for use on existing liquid overlay: Bauder LiquiTOP Reactivation Primer.

Guidance for specification option:

Primer (field areas only): Not required - to be pre-treated after the upstands and details using Bauder LiquiTOP Reactivation Primer. Use for existing lead / volatile bitumen.

LiquiTOP Reactivation Primer is a is a single-pack polyurethane primer for the reactivation of existing LiquiTOP systems, prior to over-coating. It yields excellent adhesion to existing polyurethane coating installations. This enables damage to be repaired, for example, and further coats to be applied on multi-layer systems after the standard over-coating windows have expired. It also enables recoating, at the end of the system’s design life, to provide continuing waterproofing performance.

Intended use: LiquiTOP Reactivation Primer is for use in the Bauder LiquiTOP Roof Systems. It is suitable for use in cold roof and warm roof situations for new build and refurbishment projects.

• Pack: Lift-top tin.
• Appearance: Clear liquid.
• Tin size: 5 litres.
• Cure time: Four hours.
• Application temperature: 5–25°C.
• Temperature in service: -30–90°C.
• Storage temperature: 5–25°C (stored unopened in a dry condition).
• Shelf life: When stored correctly as detailed above, the shelf life is a minimum six months. When manufactured, the product is protected with a layer of nitrogen prior to dispatch. This ensures a storage life of six months, provided that the container is left unopened in a dry condition at a temperature of 5–25°C. The layer of nitrogen will disappear and the product will have a limited life once the container is opened. It is also important to note that carbon dioxide will be given off if water enters the container, which can cause pressurization

Application:

• Product: Bauder LiquiTOP Reactivation Primer.
• Application method: Apply primer using a roller to upstands and details first, before applying to the main area.
• Application rate: 0.1–0.125 L/m² per minute.
• Next coat/ subject to stress: Can be walked upon/next coat applied after approx. four hours.

Primer for use on existing metal / volatile bitumen (field areas only): Bauder LiquiTOP Epoxy Primer.

Guidance for specification option:

To be primed after the upstands and details.

LiquiTOP Epoxy Primer is a two-component epoxy-based primer used for preparing a variety of metallic and non-metallic substrates, with excellent adhesion to steel, galvanized steel and non-ferrous metals.

Suitable for use in cold roof and warm roof situations for new build and refurbishment projects.

• Pack volume: 4 L (combined).
• Appearance: Part A: Beige liquid; Part B: Clear liquid/ mixed – yellow liquid.
• Tin size: Part A: 5 L; Part B: 0.5 L (both are lift-top tins).
• Touch dry time at 20°C: 30 minutes.
• Overcoat window: 2–4 hours minimum/ three months maximum.
• Full cure time at 20°C: Seven days.
• Pot life: 14 hours.
• Application temperature: 5–25°C
• Temperature in service: -30–100°C.
• Storage temperature: 5–25°C (stored unopened in a dry condition).
• Shelf life: Minimum 12 months when stored correctly as detailed above, provided that the containers are left unopened in a dry condition at a temperature of 5–25°C.

Application:

• Method: Apply primer using a synthetic deep pile roller to upstands and details first, before applying to the main area.
• Rate: 0.05 L/m² (20 m²/L) per minute.
• Next coat: Applied after approx. 2-4 hours.
• Installation is to be carried out by Bauder-approved contractors in accordance with the specification and guidelines. Please consult the Bauder Technical Department.

Preparation of metals:

• Return metal to a clean, bright condition. Ideally steelwork should be prepared in accordance with ISO 12944-4 or BS 7079. Where blasting is not applicable, wire brushing or grinding etc. may be acceptable although it will be more difficult to obtain the desired condition by these methods. All loose scale or rust must be removed.
• Galvanized surfaces may be primed after suitable preparation and adhesion testing, especially where the surface is weathered or dull. Bright galvanizing will need to be degreased and treated with a proprietary mordant solution before priming. Remove any dust or oxidization from non-ferrous metals and abrade before priming. Lead should be prepared in accordance with health and safety guidance: for advice on methodology contact the HSE.

Preparation of non-metallic surfaces:

• Plastics, coatings, volatile bitumen, etc. should be clean, dry, sound and free from grease. Hard materials should be abraded to provide a key. Adhesion and compatibility tests should be carried out on all non-metal substrates to confirm compatibility.
• Adhesion tests should be conducted on all non-ferrous and non-metallic surfaces to ensure the suitability of LiquiTOP Epoxy Primer and the subsequent LiquiTOP PU system.

Ensure surfaces to be primed are clean and dry and free from stripping agents, grease, dirt, debris or other contaminants.

Pour contents of Part B tin into Part A tin and mix thoroughly for 2–3 minutes until streak free and completely mixed. Apply by brush or lambs-wool roller. Leave primer to dry for 2–4 hours before the area is overlaid or adhered too, depending on ambient temperature.

Not required.

Guidance for specification option:

IMPORTANT NOTE: No primer required for:

• Hard plastics, PVC-P, mineral surface felt and non-absorbent asphalt (subject to adhesion testing).
• KLH/ timber decks (primer to upstands and details only), no primer required to field areas, as this is covered by BauderFLEX TA 600 random nailed layer.