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"CS-21 Neo" is a reactive silicate-based surface impregnation material suitable for surface protection of newly constructed concrete. By applying it to hardened concrete and allowing it to penetrate, the resulting reaction products densify the surface layer. It continuously fills in gaps that may develop over time, such as fine cracks, thereby maintaining the integrity of the cover concrete over the long term and enhancing durability. [Applications] ■ Surface protection for newly constructed concrete structures (cast-in-place, precast products) - Applicable range: Neutralization, salt damage, freeze damage suppression - Out of applicable range: ASR, chemical erosion [NETIS] Registration number: CG-160013-VE Utilization promotion technology; Technology name: Silicate-based surface impregnation material CS-21 Neo https://www.netis.mlit.go.jp/netis/pubsearch/details?regNo=CG-160013 *For more details, please refer to the PDF document or feel free to contact us.

• Reinforced concrete construction
• Reinforcement and repair materials
• Concrete curing material

The "CS-21 Builder" is a two-component reactive silicate-based surface impregnation material that is mixed with a main agent containing calcium hydroxide, which is often lacking in existing concrete. After mixing, it maintains a liquid state for a certain period and gels within the penetrated voids, remaining there. The generation of reaction products continues, allowing it to fill newly occurring fine cracks and other voids, suppressing the intrusion of deterioration factors, and contributing to longevity. 【Applications】 ■ Surface protection and crack repair of existing concrete structures - Applicable range / Suppression of carbonation, salt damage, and freeze damage - Out of applicable range / ASR (Alkali-Silica Reaction), chemical erosion 【NETIS】 Registration number: CG-170009-A; Technology name: Two-component mixed silicate-based surface impregnation material CS-21 Builder https://www.netis.mlit.go.jp/netis/pubsearch/details?regNo=CG-170009 *For more details, please refer to the PDF materials or feel free to contact us.

• Reinforcement and repair materials
• Renovation and repair methods
• Coating film waterproofing material/permeable waterproofing material

The waterproofing of concrete structures using "CS-21" does not involve forming a membrane (waterproof layer) on the surface of the concrete like traditional membrane waterproofing. Instead, it uses a colorless, transparent liquid material that is applied to and penetrates hardened concrete, making the concrete body itself the waterproofing entity. This method eliminates the need for waterproof and protective layers like those in membrane waterproofing, allowing for reduced load and shorter construction periods. Additionally, it boasts excellent durability, and since the concrete body can be directly visually inspected after construction, inspections and partial repairs after the start of use are straightforward. There are many advantages, such as not needing to remove existing coatings during reapplication. Construction achievements: As waterproofing for structures such as parking lots, rooftops, basements, and water tanks, there have been over 1,000 cases and more than 2.3 million square meters since 1994. *For more details, please visit the Concrete Body Waterproofing Research Association website (https://www.cswpd.jp/). *【Video】Introduction to the CS-21 Concrete Waterproofing Method https://www.cswpd.jp/downloads/movies/

• Waterproofing work
• Coating film waterproofing material/permeable waterproofing material
• Coating film waterproofing material/permeable waterproofing material

When pouring concrete joints, after spraying and allowing the liquid material "CS-21" to penetrate the surface of the already poured concrete, the subsequent concrete is poured, preventing water leakage from the joint (suppressing the intrusion of water and deterioration factors). Technical Proposal Document (Example) Joint Treatment https://www.cs21.jp/top/method/uchitugi/

• Waterproofing work
• Reinforced concrete construction
• Concrete construction

By applying the liquid material "CS-21" along the concrete joints, the intrusion of water and deterioration factors from the joints is suppressed. *It can also be applied to fine cracks (approximately 0.2 mm or less) that are not subject to injection methods and minor cold joints (those with color differences but without clear separation). Technical proposal document (example) Treatment of joints https://www.cs21.jp/top/method/uchitugi/

• Reinforced concrete construction
• Concrete construction
• Reinforcement and repair materials

CS Mini is a spray bottle type of "CS-21." By applying it in advance to areas prone to leakage, such as construction joints, it suppresses the formation of voids at the concrete (mortar) interface and prevents water leakage. *For treatment of construction joints with "CS-21," please refer to the technical documentation: CS-21 Construction Joint Treatment. By applying it from the surface along cracks and construction joints, it suppresses the intrusion of water and deterioration factors (steel corrosion) from cracks and joints, thereby improving durability. *For measures to enhance the durability of cracks and construction joints using "CS-21," please refer to the technical documentation: Measures to Enhance Durability of Cracks and Construction Joints Using CS-21 Coating Method.

• Coating film waterproofing material/permeable waterproofing material
• Coating film waterproofing material/permeable waterproofing material
• Reinforcement and repair materials

Simple Repair Material for Cracks in Concrete The "CS-21 Crack Repair Set" is a method for repairing cracks that occur in concrete by applying CS-21 Clear and incorporating CS Putty, which improves durability and restores aesthetics. The tools required for construction include a brush, metal spatula, rubber spatula, scraper, sandpaper, and cloth, and no special tools are needed. For usage instructions (construction steps), please download the leaflet (which includes the construction steps) or watch the YouTube video (https://www.youtube.com/watch?v=7agynSSmzg0). Total shipments: Over 10,000 sets.

• Reinforcement and repair materials
• Renovation and repair methods

The "CS Spacer" prevents the downward movement of crack prevention bars, which can lead to the occurrence of cracks, and allows for the control of crack progression and expansion, making it effective for improving the quality of concrete in deck plate composite slabs (floors and roofs). 【Features】 ■ Even during intense work, the receiving groove firmly holds the welded wire mesh and does not come loose. ■ It can be easily installed by attaching from above and lifting, ensuring good workability. ■ The shape allows for easy integration with concrete. 【NETIS】 ■ Technology Name: Wire Mesh CS Spacer - Registration No. CG-190012-A 【YouTube】 ■ Introduction to the CS Spacer https://www.youtube.com/watch?v=YSdxXse1ZRg ■ Performance confirmation of the CS Spacer at a new store construction site https://www.youtube.com/watch?v=vqHaWsIGow4 ■ CS Spacer Q&A (Frequently Asked Questions) https://www.youtube.com/watch?v=r1QD0nUuSUI *For more details, please visit the website (https://www.cswpd.jp/spacer/).

• Concrete construction
• Steel bar construction
• Steel construction

CS-21 Series Products: CS-21 Neo (NETIS: CG-160013-VE Utilization Promotion Technology, Liquid) is applied to hardened concrete surfaces to fill fine cracks and voids, such as construction joints, which are difficult to visually detect from the surface, thereby densifying the surface layer. Additionally, through ongoing reactions under moisture supply from rainwater and other sources, it fills newly generated fine voids after application, suppressing the progression and expansion of cracks. These properties help maintain the integrity of the cover concrete and suppress the intrusion of water and various deterioration factors (steel corrosion) over the long term. Since it eliminates the need for post-application watering (wet curing), which was essential with conventional materials, it offers excellent workability and is used for surface protection measures to further enhance the quality and durability of newly constructed concrete. [Construction Achievements] 311 cases [Ministry of Land, Infrastructure, Transport and Tourism: 150 cases, Other Public Works: 118 cases, etc.] - Aggregation Period: 2017 (Heisei 29) to September 2024 (Reiwa 6) [NETIS] Registration Number: CG-160013-VE Utilization Promotion Technology - Technology Name: Silicate-based Surface Penetrating Material CS-21 Neo

• Reinforced concrete construction
• Concrete construction
• Concrete curing material

CS-21 Series Products: CS-21 Builder (reactive silicate-based surface impregnation material, two-component mixed type) is applied to concrete surfaces to fill existing fine cracks and voids, thereby densifying the surface layer. Additionally, through ongoing reactions under moisture supply such as rainwater, it fills newly generated fine voids after application, suppressing the progression and expansion of cracks. These properties help maintain the integrity of the cover concrete and suppress the intrusion of water and various deterioration factors (steel corrosion) over the long term. It is ideal for surface protection during repairs as it can replenish the calcium hydroxide that is lacking in existing concrete from the additives. Furthermore, there is no need to apply the two components separately, and the watering after material application, which was essential with conventional materials, can be omitted, resulting in excellent workability. It is used for surface protection measures to improve the durability and longevity of existing structures. [Construction Achievements] 114 cases [Ministry of Land, Infrastructure, Transport and Tourism: 14 cases, other public works: 87 cases, etc.] Aggregation period: 2017 (Heisei 29) to September 2024 (Reiwa 6) [NETIS] Registration Number: CG-170009-A; Technology Name: Two-component mixed silicate-based surface impregnation material CS-21 Builder

• Reinforcement and repair materials
• Renovation and repair methods
• Waterproofing work

CS-21 is a colorless and transparent aqueous solution of inorganic nature. Developed by Aston Co., Ltd. in 1993, it is a domestically produced material. ■Features: Contains reactive components that enhance hydration, demonstrating effectiveness regardless of the age of the concrete. ■When applied to the surface of concrete, it fills fine cracks and voids, such as construction joints, which are difficult to see visually, thereby densifying the surface layer. Additionally, through ongoing reactions under moisture supply from rainwater and other sources, it fills newly generated fine voids after application, suppressing the progression and expansion of cracks. These properties help maintain the integrity of the cover concrete and suppress the intrusion of water and various deterioration factors (such as steel corrosion) over the long term. ■In the civil engineering field, it is applied for preventive maintenance against water penetration, neutralization, salt damage, freeze damage, etc., as well as for surface protection methods and durability improvement measures for cracks and construction joints. In the architectural field, it is used in waterproofing methods for new constructions (such as rooftop parking lots, basements, water tanks, etc.). ■Material classification: According to the design and construction guidelines (draft) for silicate-based surface impregnation methods in Concrete Library 137 of the Japan Society of Civil Engineers, it is classified as a "reactive silicate-based surface impregnation material." In the old classification of the surface protection method design and construction guidelines (draft) in Concrete Library 119, it is categorized as "sodium silicate-based surface impregnation material" based on its main component, and it corresponds to "when intended for waterproofing" based on construction specifications.

• Reinforced concrete construction
• Concrete construction
• Renovation and repair methods