Professional use only - from the 24th August 2023, adequate training is required before industrial or professional use of this product.

Should you require training, visit - https://www.safeusediisocyanates.eu/

Purtop HA is a two-component, solvent-free, polyurea resin formulate according to a formula developed in the MAPEI R&D laboratories. The product is applied manually, and has a workability time of 20 minutes at 23°C. Apply Purtop HA in layers at least 2 mm thick.

Due to its high tensile strength, tear strength and crack-bridging capacity, when reticulation is complete, Purtop HA forms a seamless, waterproof coating which adapts to any shape of substrate without cracking (including in service temperatures lower than -20°C).

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• Features & Benefits
• Surface Preparation
• Application
• Technical Data

Features & Benefits

• Excellent tensile strength (10 N/mm² according to ISO 37)
• Excellent tear strength (40 N/mm according to ISO 34-1)
• High static and dynamic crack-bridging capacity, including at low temperatures (below -20°C)
• Elongation capacity of more than 500% (ISO 37)
• Excellent resistance to alkalis and diluted acids
• No reinforcement required
• Does not generate overloads on load-bearing structures

Substrate Preparation

• Clean and prime substrates before applying Purtop HA
• Do not apply Purtop HA on substrates with rising damp
• Do not dilute Purtop HA with water or solvent
• Check the substrate to make sure it is suitable for applying the waterproofing system. If necessary, prepare the surface with a suitable mechanical treatment to remove all traces of oil, grease, dirt and any other material which could compromise adhesion of the waterproofing system
• Remove all dust and any loose or detached parts from the substrate to leave a dry, porous, slightly rough surface with no contaminants

The treatment method employed to prepare the substrate and the type of primer used depends on the type of substrate on which Purtop HA is applied.

For mineral substrates (concrete, screeds, etc.):

• Apply a coat of Primer SN with a trowel or smooth spreader and dust the surface with Quartz 0.5
• Apply the waterproofing membrane within 12 to 24 hours of applying the primer (at a temperature of between +15°C and +25°C)
• If the level of residual humidity in the substrate is higher than 4% and it is not possible to wait until it drops to a lower value, apply several coats of Triblock P three-component epoxy-cementitious primer according to the condition of the substrate, until the system is completely sealed
• When the primer has cured sufficiently (3-7 days) apply a coat of epoxy primer (such as Primer SN or Mapecoat I 600 W)
• Clean and sandblast metallic substrates, then apply Primer EP Rustop two-component epoxy primer by brush, with a roller or by airless spray.

For small, local repairs on existing membranes from the Purtop range: Lightly sand the membrane and apply Primer M by brush before carrying out the repair work.

Application

• Purtop HA is supplied in pre-dosed kits (component A + component B) to enable the correct mixing ratio between the two components. Before mixing the components, store them at a temperature of between +15°C and +25°C
• Mix them together by pouring the contents of component B into the container with component A, and mix them together for at least three minutes until they are completely blended. Do not mix the product manually
• Scrape around the sides of the container to make sure all the contents of the two components are completely blended
• Once Purtop HA is completely blended, it is easy to apply by pouring and spreading it evenly on the surface with a notched trowel (the size of the notches depends on the average thickness of the membrane)
• Because of the high adhesion of Purtop HA, we recommend cleaning tools with solvent naptha before it starts to set. Once hardened, cleaning is much more difficult and must be carried out mechanically
• Consumption of Purtop HA depends on the roughness of the various substrates. The theoretical consumption on a smooth surface with a substrate temperature of between +15°C and +25°C is 2.6 kg/m² per 2.0 mm of thickness. If the substrate is rougher or if the application temperature is lower, consumption and the setting and hardening times increase considerably. For severely damaged substrates, we recommend repairing them with a suitable product beforehand

Technical Data