Skip to Content
Recent searches
      FIND STORE
      packshot product global ceresit cp30 2

      Coatings - special liquids

      CERESIT CP 30
      Aquablock - Silicone waterproofing coating - Elastic one-component thin-layer silicone rubber for roof waterproofing

      Solvent-free, ready-to-use silicone rubber thick coating for the seamless and crack-bridging substrate protection and waterproofing of roof areas. Suitable for zero slope roofs.
      • UV-resistant and weatherproof
      • Waterproof and vapor permeable
      • Permanently flexible at low temperatures

      TDS (1)

      Find a retailer
      We have you covered
      Find a retailer

      Works Well With
      • ${/content/heliux/adhesive/ceresit/com/en/products/flooring/product#/ceresit-r-766/SAP_0201TNC015M1/searchResult.productFields.MainImageAltText}

        Flooring primers
        CERESIT R 766

        For absorbent and non-absorbent substrates, ensuring the adhesion of self-levelling compounds or repair mortars to the substrate. 
      • ${/content/heliux/adhesive/ceresit/com/en/products/waterproofing/product#/ceresit-cp-27/SAP_0201WRC014B2/searchResult.productFields.MainImageAltText}

        Coatings - special liquids
        CERESIT CP 27

        Multi-purpose waterbased silicone sealant which adheres to most common building substrates. 
      • Fallback Image

        Bitumen-thick coatings
        CERESIT CP 43

        Fiber-reinforced bitumen waterproofing coat for the full-substrate waterproofing suitable for all water load types. Quickly rainproof and rapidly dries to produce a flexible, crack-bridging waterproofing layer. 
      • ${/content/heliux/adhesive/ceresit/com/en/products/waterproofing/product#/ceresit-cr-90/SAP_0201WHC014C8/searchResult.productFields.MainImageAltText}

        Cement slurries rigid
        CERESIT CR 90

        For waterproofing buildings and structural components forms a waterproofing layer on the substrate of the substrates and additionally, during the structure exploitation, it builds crystals in the substrate pores. 

      Product Description

      CERESIT® CP 30, used for quick repairs of flat and pitched roofs as well as for permanent waterproofing of flat roofs as a finishing coat. Suitable for mineral substrates - concrete, screed, fiber cement boards, roof tiles, bituminous substrates (roofing membranes and coatings), acrylic roof coatings, metal coatings (copper, zinc, aluminum, stainless steel, brass), plastic (ventilation pipes connection, drains or skylight frames), thermal insulation layers (PU foam, EPS) and wood materials (OSB, chipboard, solid wood).Available pack size: 1 kg, 5 kg
      • UV-resistant and weatherproof
      • Waterproof and vapor permeable
      • Permanently flexible at low temperatures
      • Easy applicable by brush, roller or spray
      • Easy cleaning of tools with water
      packshot product global ceresit cp30 2

      How to Use

      CERESIT CP 30 AQUABLOCK SUBSTRATE PREPARATION

      Absorbent substrates: Mineral substrates and wood have to be cleaned mechanically. Mechanically remove algae and lichen as well as loose particles and coatings. Bitumen: Thoroughly remove any loose stone chips and sand as well as the weather-worn bitumen. After that, prime the substrate with CERESIT CP 29 Aquablock Primer. Metals: Completely remove any oxide layers (patina) and clean with a solvent-based cleaner e.g. spirit. A priming coat is not required. Plastic materials: After mechanical roughening clean the plastic materials with a solvent-based cleaner, e.g. spirit. Then pretreat with CERESIT CP 29 Aquablock Primer.PUR / EPS board: Very smooth substrates have to be roughened slightly and after cleaning the grinding dust CERESIT CP 29 Aquablock Primer must be applied before CERESIT CP 30.

      APPLICATION OF CERESIT CP 30 COATING

      CERESIT CP 30 Aquablock Coating is ready-to-use and can be applied directly by means of a paint brush, roller, ceiling brush or by using the airless spraying technique. CP 30 Aquablock can be used for 3 types of coating application: Substrate protection - UV resistence - 1-1,5mm layer. Sealing coat - Soak a short-pile roller in CP 30 Aquablock Coating and roll the fleece down into the first coat so that it is fully embedded. Wait until the first layer has fully dried (waiting time approx. 24 hours, depending on the weather) before applying the second coat. Walkaways for roof inspection and maintenance - It is recommended to use a contrasting color for these areas and a layer thickness of 0 mm. Sprinkle quartz sand (e.g. grit 0.1– 0.4 mm) into the fresh top coat of the service walkways to prevent slipping.

      IMPORTANT TO NOTE WHEN USING CERESIT CP 30 AQUABLOCK

      Use CERESIT CP 30 Aquablock Coating only in dry weather with material and air temperatures of +10 °C to +30 °C and below 75% relative air humidity. The substrate temperature must be between +5 °C and +50 °C. When working in cold weather, make sure that the substrate temperature is at least 3 °C above the thaw point; otherwise a separating moisture film will form. Do not use CP 30 Aquablock Coating on transparent plastics (e.g. Plexiglas®, Makrolon®, PETG) used e.g. for domelights/skylights.

      Frequently asked questions

      CERESIT CP 30 Aquablock can be used on these substrates: mineral substrates (e.g. concrete, screed, fiber cement boards, roof tiles), bituminous substrates (e.g. roofing membranes and coatings), acrylic roof coatings, metals (e.g. copper, zinc aluminum, stainless steel, brass), plastics (e.g. connections to ventilation pipes, drains or skylight frames), thermal insulation layers made (e.g. of PUR, EPS), wooden materials. CP 30 is especially suited for the reconstruction and repair of leaks, roof connections and pipe penetrations.

      CERESIT CP 30 Aquablock can be used on these substrates: mineral substrates (e.g. concrete, screed, fiber cement boards, roof tiles), bituminous substrates (e.g. roofing membranes and coatings), acrylic roof coatings, metals (e.g. copper, zinc aluminum, stainless steel, brass), plastics (e.g. connections to ventilation pipes, drains or skylight frames), thermal insulation layers made (e.g. of PUR, EPS), wooden materials. CP 30 is especially suited for the reconstruction and repair of leaks, roof connections and pipe penetrations.

      CERESIT CP 30 Aquablock can be used on these substrates: mineral substrates (e.g. concrete, screed, fiber cement boards, roof tiles), bituminous substrates (e.g. roofing membranes and coatings), acrylic roof coatings, metals (e.g. copper, zinc aluminum, stainless steel, brass), plastics (e.g. connections to ventilation pipes, drains or skylight frames), thermal insulation layers made (e.g. of PUR, EPS), wooden materials. CP 30 is especially suited for the reconstruction and repair of leaks, roof connections and pipe penetrations.

      Looking to Upgrade?
      • ${/content/heliux/adhesive/ceresit/com/en/products/waterproofing/product#/ceresit-cr-90/SAP_0201WHC014C8/searchResult.productFields.MainImageAltText}

        Cement slurries rigid
        CERESIT CR 90

        For waterproofing buildings and structural components forms a waterproofing layer on the substrate of the substrates and additionally, during the structure exploitation, it builds crystals in the substrate pores. 

      Related How-To Guides
      View all
      • Horizontal barrier under foundation wall

        Application of horizontal waterproofing inside and under foundation walls 
      • Concrete structures protection with mineral waterproofing slurries

        Application of cementitious slurries 
      Find Store

      © 2025 HENKEL AG & CO. KGAA
      Recent searches