Dust from the pavement one month after opening: Sumida Skateboard Park
Seal Hard Skate Park Renovation Specifications
After just one month since its opening, the park became notorious for being "covered in dust." After renovations, there is no dust, and the surface is better than when it first opened!
Sumida Skateboard Park" located in Sumida Ward, Tokyo, is a long-awaited park for skaters that opened in April 2024. However, shortly after its opening, concrete dust began to emerge, leading to harsh criticism from skaters on social media, prompting inquiries from concerned officials in Sumida Ward. During the renovation work, we used six times the usual amount of seal hardener for new constructions, resulting in a smooth, dust-free surface. Not only did it restore the surface to a slick finish, but it also created a durable surface with wear resistance and rainwater resistance! After the work was completed, the officials praised us, saying, "The surface has changed dramatically! The finish of the skate park surface is truly important.
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basic information
Seal Hard Skate Park Renovation Specifications - Surface Concrete Grinding: The surface irregularities will be ground down using a large grinder made by the American company STI. - Joint Leveling Grinding: The uneven joint areas will be ground down using a medium grinder to level the height and eliminate the step. - Joint Filling Repair: Joints that were 10-20mm wide will be filled with American-made fast-setting repair mortar. - Surface Depressions Resin Filling Repair: Areas that remain depressed after grinding will be coated with a special resin made in the USA. - Surface Concrete Finishing Grinding: Final grinding will be done to achieve a smooth surface. - Application of Penetrating Surface Hardener Seal Hard: This will enhance wear resistance and create a surface that can withstand wear from skateboarding. - Application of Penetrating Water Absorption Suppressant AquaPel Plus: This will suppress rainwater penetration and prevent surface deterioration due to rain. - Skateboard Test Run Confirmation: The finished surface will be tested with a skateboard to confirm that it provides the necessary grip for skateboarding. The penetrating concrete surface hardener was weak against rain and had low effectiveness outdoors. Therefore, by combining diamond grinding with the water absorption suppressant "AquaPel Plus," we have addressed this weakness and developed a method specifically for skate parks, which is currently under patent application.
Price information
The price varies depending on the roughness of the surface and the area of application. Please contact us for more details.
Delivery Time
※The construction period varies depending on the construction timing and area, so please contact us for more details.
Applications/Examples of results
Skate parks that have been resurfaced with the same "Seal Hard Skate Park Renovation Specification" as the Sumida Skateboard Park: - Higashi Kanazawa Sports Square Skate Park (Kanazawa City, Ishikawa Prefecture) - Sasebo Park Skateboard Park (Sasebo City, Nagasaki Prefecture) - Nagao Skate Park (Sanuki City, Kagawa Prefecture) - NIX Street Sports Park (Toyama City, Toyama Prefecture) Although not renovations, skate parks that have been finished with the "Seal Hard Skate Park New Construction Specification": - Green Park Daimon Skateboard Square (Imizu City, Toyama Prefecture) - Tiger Lux Skateboard Park Nagai (Osaka City, Osaka Prefecture) - Toyo Carbon Urban Sports Park Marugame (Marugame City, Kagawa Prefecture) - Nitto Shinko Stadium Maruoka Skateboard Square (Sakai City, Fukui Prefecture) - Ishioka Skateboard Park (Ishioka City, Ibaraki Prefecture)
Detailed information
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Dust removal
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Surface grinding: Grinding the damaged surface with a medium-sized grinder to eliminate unevenness.
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For shallow dents that remain after grinding, a special outdoor-grade resin made in the USA is used for filling with a trowel application.
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Surface polishing: Polishing fine details with a special handheld polishing machine to smooth the surface.
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【Seal Hard Application】 We will apply the penetrating concrete surface hardener "Seal Hard." With the effect of Seal Hard, the deteriorated concrete will gradually harden and transform. Since Seal Hard is a non-film-forming penetrating type, it will not peel off. However, the penetrating hardener is vulnerable to rainwater; when exposed to rainwater, the penetrating components can dissolve and wash away.
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【Application of Aquapel Plus】 The penetrating water-repellent agent "Aquapel Plus" will be applied. Aquapel Plus is a hybrid water-repellent material based on silane and siloxane, which initially repels water like beads after application. It compensates for the weaknesses of Seal Hard, which is vulnerable to rain, and transforms it into strong, rain-resistant concrete.
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[Test Run Confirmation] If too much Aqua Pearl Plus is applied, the grip will weaken and cause sliding during turns. Therefore, a staff member skilled in skateboarding will conduct a test run on a skateboard to check the resistance while sliding and the grip during turns. If any issues are found during the confirmation, adjustments will be made through re-cleaning with a polisher or polishing.
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![[Seal Hard - Skate Park Specification] Concrete surface finish suitable for skate parks | Wear-resistant | Water absorption suppression | Long lifespan](https://image.www.ipros.com/public/catalog/image/01/558/693096/IPROS44690527504882566076.jpeg?w=120&h=170)
CAD data（1）
| Model number | overview | File |
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| Standard Drawing for Skate Park Surface Specifications | The "Seal Hard Skate Park Specification" is a construction method provided in the following steps 1 to 4. [Patent pending] ◆1. Concrete grinding (for renovation only) ◆2. Concrete polishing ◆3. Penetrating surface hardener Seal Hard ◆4. Water absorption suppressor (water repellent) Aquapel Plus This is a pavement specification created based on past achievements. Please feel free to copy and use it when designing future skate parks. |
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Company information
The Wilby Building Materials Division is a professional group specializing in sports facility construction and flooring finishing work. 【Building Materials Division】 ● Sports Facility Business: Centered in Hokuriku and Niigata, we engage in specialized construction related to sports facilities such as swimming pools and gymnasiums, as well as flooring work for various facilities. ● Building Sales Business: We provide high-value flooring products that are not available in conventional offerings, such as scratch-resistant flooring "Cattina" and natural wood composite flooring "Alpito." ● Good Floor Business: As the domestic importer of concrete chemical products from the U.S. company LATICRETE, we offer various concrete flooring solutions, including "Seal Hard." ● Environmental Business: We propose and sell installation services for products such as "Painted Insulation Material Gain," "Cool Roof," "Seismic Ceiling WILL-TEC Method," and "Nano Zone Coat." 【Construction Division】 We construct numerous low-cost steel frame buildings for logistics facilities such as distribution centers and warehouses, as well as commercial facilities like supermarkets, home centers, drugstores, and fashion malls throughout Japan. We provide consistent services tailored to customer needs, including land development, design, and comprehensive construction.