Concrete Sealing

AREXAL® Hydro Concrete is a permanent impregnation penetrating up to 20 cm deep (No chemicals or chlorides) - lasting protection for your structure What is Hydrophobization? Hydrophobization is the prevention of water transport in the capillary system of concrete for all open-pored cementitious or mineral surfaces, both inside and outside. AREXAL® Hydro Concrete forms a highly water- and dirt-repellent surface that is very easy to clean. It prevents moss, fungus, or algae growth. It protects the material against efflorescence, air pollution, and UV radiation. Furthermore, it provides transparent protection on all types of walls / concrete surfaces and maintains the natural look. AREXAL® Hydro Concrete is colorless, odorless, solvent-free, non-flammable, and non-toxic. It does not leave a film layer but a clear and natural surface. In the commercial sector, AREXAL® Hydro Concrete is most often used for natural surfaces and is repellent against water, all types of liquids (oil, grease, red wine, coffee, etc.), simple paint, and environmental influences. Old (untreated) stones and bricks regain their original appearance, become impermeable to water, and are permanently protected. In addition, "drying out" and protection against penetrating rain reduce heating and energy costs. Typical areas are walls, floors, ceilings, chimneys, roof tiles, patios, flat roofs, and swimming pools made of concrete. How does AREXAL® Hydro Concrete work AREXAL® Hydro Concrete impregnates all open-pored cementitious or mineral surfaces, both inside and outside. It includes any kind of concrete, screed, brick, clay, clinker, and various stones (e.g., sandstone, terracotta, brick, etc.). AREXAL® Hydro Concrete forms a highly water- and dirt-repellent surface, preventing moss, fungus, or algae growth and is very easy to clean. The surface treated with AREXAL® Hydro Concrete is protected from salt efflorescence, air pollution, and UV rays. Advantages easy and trouble-free to process odor-neutral environmentally friendly breathable acid-resistant one-time treatment longer lifespan reduced maintenance needs dust-binding easier cleaning Properties colorless, odorless, solvent-free, non-flammable, and non-toxic leaves no film layer but a transparent, clear, and natural surface water-soluble potassium methylsilanetriolate with organic catalyst, non-film forming, highly capillary-active, non-flammable impregnates mineral building materials up to a depth of 200 mm (with one to max. two applications, wet on wet) and hydrophobizes the surface Material Pure natural product based on water-soluble potassium methylsilanetriolate with organic catalyst, ready to use. Application Before use, turn the container upside down and shake well. AREXAL® Hydro Concrete is most easily and evenly applied with a standard pressure sprayer. For small areas, a roller, brush, or sponge can also be used. To avoid puddling, the surface to be treated should be thinly and evenly wetted. AREXAL® Hydro Concrete must not be diluted and only transferred into unused containers. As a rule, one treatment is sufficient. For highly absorbent surfaces, a further treatment – wet on wet – is recommended. Caution AREXAL® Hydro Concrete is hydrophobic, therefore, do not apply it to surfaces that will be treated with other materials. Applying paint, etc., is not possible after treatment with AREXAL® Hydro Concrete. Use Basically, AREXAL® Hydro Concrete is a surface sealant with depth effect for all types of concrete, stone types (such as brick, sand-lime brick, granite, slate, etc.), cement plaster, and unglazed tiles. It can be used on these materials if the surfaces are to be completely sealed and protected against water and acids, but not further treated or painted. The range of applications is very broad. AREXAL® Hydro Concrete does not work on treated surfaces and materials. Please check carefully whether your concrete, stone, or plaster, etc., has been chemically treated. AREXAL® Hydro Concrete can only be used on natural concrete, stones, tiles, or bricks. In rare cases, some newer concretes and stones have been treated with additives, which can cause a color deviation. If unsure, apply AREXAL® Hydro Concrete to an inconspicuous area for testing and wait 2 days. Suitable Surfaces Brick facades (sealing, stone restoration, energy cost reduction, joint sealing) - e.g., in monument restoration Unsealed stone floors (sand-lime brick, sandstone, granite, slate, terracotta, basalt, etc.) Kitchen countertops, bathroom shelves, window sills made of unsealed stone Non-glazed tiles (e.g., terracotta, granite, slate, etc.) Exterior walls and masonry made of natural-looking stones Mineral plasters (without chemical or water-repellent substances) Garage floors with exposed concrete look (against oil stains, etc.) Roof tiles (unglazed made of clay or concrete) - are sealed (replace broken ones first!) Swimming pools made of exposed concrete (treat with AREXAL® Hydro Concrete beforehand) Sealing of joints in showers, wet rooms, swimming pools Chimneys (made of brick or other stone types with natural look) Screed floors (e.g., as industrial floors, etc.) Flat roofs (treat with AREXAL® Hydro Concrete beforehand) Eternit panels (e.g., as house cladding or corrugated eternit panels for the roof) Fountains and garden facilities made of concrete and stone Terracotta flower pots (retain their natural look and become frost-proof)

Inorganic copolymer, the only liquid additive with more than 60 years of expertise for concrete/screed In concrete according to DIN EN 206-1/DIN 1045-2, only concrete admixtures according to DIN EN 934-2 or with general building inspection approval may be used. Our product meets the DIN EN 934-2:2012 standard and is radon gas tight. Product Description Main uses: AREXAL®-liquid X is used to equip concrete for applications in structural and civil engineering with greater durability in structures historically prone to accelerated damage, to provide increased protection against corrosion of concrete steel, and to replace additional external waterproofing. The entire concrete is WD (waterproof) and not just WU (water-impermeable) (WU=DIN= Penetration depth allowed up to 5.0 cm). WU concrete is the abbreviation for water-impermeable concrete. This material and component, as long as there are no cracks or holes, secures the seal against water. It is important to know that in WU concrete, the water penetration depth to be demonstrated can be up to 5.0 cm. With AREXAL®-liquid X, the penetration depth under permanent water pressure of 7 bar is at most 1.8 cm! Typical applications include: heritage conservation, floor slabs, basement construction, highways, airport runways, parking garages, foundations, external walls and floor slabs in the ground, sewage treatment plants, underground vaults, tanks and pits, swimming pools, pressure mats, water storage tanks, tunnels, bridge structures (prefabricated and cast-in-place), curbs and gutters, sidewalks, manholes, catch basins, water parks, dams. Hardened Concrete: higher compressive strength (with the same spread and air pore content) meets the requirements of ASTM C 494, chemical additives for concrete, Type A positive effect on all physical properties waterproof under hydrostatic pressure up to 7 bar, more than 100 psi (0.7 MPa). results in a completely waterproof mass. hard durable surfaces are resistant to sanding or chipping off surfaces are also very resistant to breaking and wear eliminates the formation of condensation in the pore matrix, resulting in excellent frost/thaw resistance Composition and Chemical Components AREXAL®-liquid X is an inorganic, copolymer, liquid additive for concrete, capable of chemically reacting with Portland cement, thereby improving the properties of concrete in all phases of its production, in the fresh state, during curing, and as finished concrete. Sealing Effects The most water-soluble components, calcium hydroxide and calcium-aluminum hydroxide (also referred to as free lime), are converted into the insoluble minerals, tricalcium silicate and tricalcium aluminum silicate. These insoluble minerals grow into the capillaries as very fine micro-crystals. Combined with the micro-pore structure, this results in a concrete mass that can withstand the penetration of water even under the highest pressures. Long-term Durability A large amount of macro-pores (found in normal concrete) are reduced in size to micro-pores in AREXAL®-liquid X concrete. About 3.8% of the mass of AREXAL®-liquid X concrete is occupied by these micro-pores. The micro-pores are hydrophobic and, although the system "breathes," condensation cannot form. This fact, combined with other physical properties of AREXAL®-liquid X concrete, results in a concrete matrix that is extremely durable even under the most adverse conditions. Advantages of AREXAL®-liquid X Fresh Concrete: contains no calcium chloride (or other chloride ions) abrasion resistant (no sanding or wear of the concrete even after more than 40 years) concrete with a lower spread is easier to mix, pump, and compact lower water/cement ratio very cohesive, therefore no voids and shrinkage cavities less water separation (bleeding) and therefore faster finish excellent workability due to better flow and smoothing properties easy to pump AREXAL®-liquid X reduces efflorescence and shows increased resistance to chloride ion penetration - it does not wear out like a coating (AASHTO T259-78) minimal separation during curing significantly reduces shrinkage behavior lower controlled development of hydration heat Corrosion Resistance Independent on-site investigations and laboratory tests show that AREXAL®-liquid X concrete protects reinforcing steel from corrosion and thus permanently prevents concrete spalling! Technical Data Packaging: 10l canister, 25 l canister, 200 l drum, 1000-l one-way container Shelf life: 3 years: protect from frost Dosage: 1 wt-% based on cement weight = 0.9 l/100 kg cement Macrocell Corrosion Test Macrocell corrosion test after 48 weeks of alternating cycles of 4 days immersed in 15% NaCI solution and 3 days dried at 38°C, showed the corrosion current of AREXAL®-liquid X concrete, according to half-cell potential, values of chloride ion content, all of which were below recognized corrosion threshold values. After forty-eight weeks the slabs were destroyed, and no corrosion on the reinforcing steel was discernible. Highway bridge study by Wiss, Janney, Elstner Associates, AG, February 1991, 1998. Installation AREXAL®-liquid X additive is added to the concrete on the construction site, in the ready-mix concrete plant, or in the precast concrete plant. Shake the canister very strongly so that settled crystalline in the container are completely mixed. Procedure Compare the delivery mix with the specification Stir or shake AREXAL®-liquid X in the canister. Continue mixing until a uniformly white consistency is achieved. Add AREXAL®-liquid X to the concrete mixer in the correct dosage (0.9 l / 100 KG cement) Mix AREXAL®-liquid X in the concrete mixer truck at the highest speed for 5 minutes Ensure that no additional mixing water is added. The concrete consistency must be set beforehand. Addition of water at this point will negate the beneficial effects of AREXAL®-liquid X and may void the warranty. AREXAL®-liquid X Specification AREXAL®-liquid X is added to the concrete at a dosage of 0.9 l per 100 kg cement. After adding AREXAL®-liquid X to the mixer of a ready-mix concrete truck, the concrete must be mixed for five minutes at maximum speed. The concrete mix is planned, processed, and cured in accordance with the valid DIN regulations of the respective country. Note: Normal procedures for processing concrete, as described in the ACI Manual of Concrete Practice, are to be followed when handling, placing, processing, and finishing AREXAL®-liquid X concrete. To achieve optimal mechanical properties, full compaction is necessary. Curing procedures, as described in the ACI Manual of Concrete Practice (latest edition), must also be followed. Warranty 25-year warranty on all concrete parts treated with AREXAL®-liquid X. The prerequisite for the warranty is proper application! Maintenance Normal maintenance required for concrete structures also applies to AREXAL®-liquid X concrete. Technical Support You will receive support at any time from one of our many PAN-TECH technical consultants on-site, including training and instruction. Or telephone consultation, please call us for this. Below is a summary of some of the tests conducted with AREXAL®-liquid X concrete. Permeability of liquid X concrete compared to normal concrete, F(c)= 4000 psi (28 N/mm2) modified CRD-C 48-55 testing procedure. Reduction in penetration depth by 84%; reduction in volume of penetrated water by 98%. Compressive strength, psi, ASTM C 39-Minimum 110% compared to reference concrete at 3-, 7-, 28-day samples Flexural tensile strength, psi, ASTM C 78 3, 7, 28-day samples all determined values greater than comparison samples (same air content and spread) Length change, ASTM C157 AREXAL®-liquid X approximately 25% less shrinkage Adhesion to reinforcing steel, psi, ASTM C 234 Minimum 105% at 28-day comparison tests Hydration heat, cal. /g., ASTM C186 AREXAL®-liquid X shows 13% less hydration heat Capillary water absorption, % AREXAL®-liquid X has 48% compared to control concrete at 12 mm immersion and 44% compared to control concrete at 140 mm immersion Frost-thaw resistance, AASHTO T161, 300 cycles 101.2% of control sample Resistance of concrete to chloride ion penetration, AASHTO T259-78/T260-78 75% greater than control sample Reduction in alkali-silica expansion reaction, %, ASTM C 441 47% less expansion than control sample

Permanent surface protection and up to 20cm deep penetrating, permanent impregnation (No chemicals or chlorides), lasting protection of your structure. AREXAL®-Pro-Beton strengthens concrete surfaces and protects them against severe wear, chlorides, and aggressive liquids. The protection is breathable, long-lasting, and acid-resistant. AREXAL®-Pro-Beton is a surface sealant and protective treatment for vulnerable concrete surfaces, such as industrial floors and parking garage levels. AREXAL®-Pro-Beton is also used for strengthening surfaces and binding dust during the grinding and polishing process of concrete floors. The result is a very resistant and scratch-proof surface. AREXAL®-Pro-Beton penetrates deeply into capillaries, microcracks, and pores. A chemical reaction between salts and minerals forms a very hard calcium silicate hydrate. Consequently, a crystalline structure forms, preventing water penetration but allowing the escape of vapors (diffusion). As the protection penetrates deeply into the concrete, it is resistant to external influences like abrasion and impacts. A treatment increases the durability (abrasion resistance) of new concrete by more than 35 percent and strengthens older, weather-exposed concrete, mortar, and self-leveling cement-based floor screeds. The treated surface becomes slightly water-repellent (hydrophobic) after the final treatment. For very damp materials, a pretreatment for deep action with other products from the AREXAL® series is recommended. Application Areas Concrete in harsh environments Roads, bridges, tunnels Parking lots and garages Water supply and sewage systems Industrial and material storage floors Marine environments Vehicle wash areas and workshops Cold storage rooms Agricultural silos Biogas plants Sawmills, paper mills Recycling and waste facilities Balconies, stairs Advantages easy, fast, and trouble-free to apply odorless environmentally friendly breathable acid-resistant UV-resistant Application AREXAL®-Pro-Beton is delivered ready for use and does not need to be mixed or diluted with other liquids. Shake the container before use. The surface to be treated must be free of dust, paint, or other coatings that could impair the material's absorbency. Repair damages or visible cracks (>1.0 mm) before treatment. Protect glass, aluminum, and polished or painted surfaces from etching. If splashes occur, immediately rinse the affected areas with water and if necessary, clean with an alkaline solution. The temperature during application and for the following 24 hours must be ≥ +5°C. Avoid direct sunlight during application. For easy processing, use a commercial low-pressure sprayer or a roller. Apply the product at least twice at intervals of 5–15 minutes between each application until complete saturation of the material is achieved. Note that the spray mist can spread very far during application and can damage glass surfaces. On horizontal concrete surfaces, AREXAL®-Pro-Beton can be poured out and spread with a rubber squeegee, brush, or mop. Avoid forming dry spots during treatment. Full saturation is achieved after about 20–30 minutes. Remove residues, as otherwise, shiny or white spots could form.