• PMMA-Based Waterproofing Coating
PMMA-Based Waterproofing Coating liquid applied waterproofing solution

PMMA-Based Waterproofing Coating is easy and quick to apply - whether covering large or small areas

PMMA-Based Waterproofing Coating liquid applied waterproofing solution

This PMMA-Based Waterproofing Coating is a 2-component, rapid curing and highly flexible PMMA-based waterproofing resin with low-temperature flexibility for waterproofing and corrosion protection.

This system consists of high-grade PMMA-based (polymethyl methacrylate) waterproofing resins with low-temperature flexibility. The system is applied together with fleece reinforcement to create durable and reliable roof waterproofing membranes which effectively waterproof joints on water-impermeable concrete. This liquid application allows seamless waterproofing to large areas and even the most complex roof penetrations can be securely incorporated in the system.

PMMA-Based Waterproofing Coating is designed to:

  • Fully cure in 3 hours* (*approximately – at 20°C , 2% Catalyst)
  • Be highly flexible and crack-bridging even at extreme sub-zero temperatures
  • Provide permanent weather-resistance (UV-, hydrolysis- and alkali-resistant)
  • Fully bond to the substrate, ensuring there are no flow paths for water
  • Safely, quickly and easily apply by sheepskin roller or brush and cures rapidly
  • Can be applied to almost all substrates, including variable substrates (when combined with appropriate primers) and can be applied at sub-zero temperatures

PMMA-Based Waterproofing Coating Application areas include:

  • Flat areas and details on roofs as well as water-impermeable concrete joints
Pack Size The 5kg 10kg and 20kg containers are supplied with catalyst
Application Temperatures Air: -5°C to +35°C

Substrate*: +3°C to +50°C*

Material: +3°C to +30°C

*substrate temperature must be at least 3°C above the dew point during application and curing.
The substrate temperature must not be less than +3°C if a topping is applied to the surface. Reaction problems can occur at lower temperatures.

Humidity and moisture Relative humidity must be ≤ 90 %.
The surface to be coated must be dry and ice-free.
The surface must be protected from moisture until the coating has hardened.
Reaction times
(at 20°C, 2% Catalyst)
Pot Life: Approximately 15 minutes

Rain Proof: Approximately 30 minutes

Walkable / Overlayable: Approximately 1 hour

Fully Cured: Approximately 3 hours

Recommended amount of Catalyst required to adjust the curing reaction to the temperature

(higher temperatures or greater proportions of Catalyst will reduce reaction times. Lower temperatures and smaller Catalyst proportions will increase reaction times).

Substrate Temperature in °C : Required Catalyst Amounts in % w/w (guide)

-10°C : –

-5°C : –

+3°C : 4%

+5°C : 4%

+10°C : 4%

+15°C : 2%

+20°C : 2%

+25°C : 2%

+30°C : 2%

+35°C : 2%

+40°C : 1%

+45°C : 1%

+50°C : 1%

Consumption Rates As technical membrane: approx 2.50kg/m²

As membrane + covering layer: approx 4.00kg/m²

Technical Data Density: 1.21kg/cm³

Water vapour diffusion resistance factor: 4.335

Product Application For mixing the product: Twin-paddle stirrer

For applying the product: Sheepskin roller; Brush (only for areas not accessible with the sheepskin roller)

Substrate to be coated Apply the waterproofing resin to the cured primer or the suitably prepared substrate.
Mixing First stir the tub contents thoroughly. Then add the catalyst while stirring at the slow-speed setting and mix for 2 minutes. Make sure that the product on the base and sides of the container is mixed in.

At product temperatures -10°C the product should be stirred for 5 minutes, as the catalyst will take longer to dissolve.

Application Apply a generous and even layer of the mixed material to cover the entire area (at least 1.5kg/m²), then immediately embed the special synthetic-fibre fleece for waterproofing resins and use a sheepskin roller to remove any air bubbles. Cover the fleece straightaway (wet in wet) with a second layer of material (at least 1kg/m², as required). In each case use a sheepskin roller to spread the material over the surface.

Fleece overlaps must be at least 5cm wide.

Preparation for subsequent layers a) Fully bonded surfacing (e.g. tiles)
Once the waterproofing resin has cured, apply an additional covering layer (approximately 1.5kg/m²) and top with a generous amount of sand while still wet (quartz sand 0.7 – 1.2mm).
Vacuum off the excess/loose sand after the surface has hardened.
The topping gives the surface the necessary roughness that allows the subsequent surfacing supplied by other to be bonded onto the base.
Never apply the sand topping to the waterproofing layer. Only use dry quartz sand.
b)Loose-laid surfacing (e.g. stone slabs)
Once the waterproofing resin has cured, apply an additional covering layer (approximately 1.5kg/m²). This protects the waterproofing layer against the mechanical loads of the surfacing supplied by others.
Cleaning When work is interrupted or completed clean the tools thoroughly with Cactus Cleaning Agent within the pot life of the material (approximately 10 minutes). This can be done with a brush. Do not use the tools again until the cleaning agent has evaporated fully.
Simply immersing the tools in the cleaning agent will not prevent the material from hardening.
Storage Store products sealed in their original airtight container in a cool, dry and frost-free place. Unopened product has a shelf life of at least 6 months after delivery. Direct sunlight on the containers should be avoided, including on site. After removing some contents, reseal the containers so they are airtight.

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