[Information] Explanation of Waterproof Tape for Residential Use - Differences Between Butyl and Acrylic
This article explains the importance of waterproof tape in residential construction, as well as the differences and characteristics of typical butyl and acrylic tapes.
■Why is waterproof tape necessary? In recent years, typhoons and sudden heavy rains have become frequent, increasing the importance of "waterproofing" in residential construction. Japan experiences more than double the annual rainfall compared to other countries, excluding Southeast Asia, resulting in a higher risk of leaks. Moreover, modern homes are exposed to multiple external factors, such as reduced eaves and overhangs due to design, and high airtightness that makes it difficult for water to escape. In fact, 93% of insurance claims are due to leaks from exterior walls and roofs. (Source: Ministry of Land, Infrastructure, Transport and Tourism, https://www.mlit.go.jp/jutakukentiku/house/jutakukentiku_house_tk4_000164.html) It is crucial to take preventive measures, such as carefully applying waterproof tape in the necessary areas. ■Areas of waterproof tape use and leak incidents Among these, the occurrence of leaks is more than five times higher in "walls" than in "roofs," with the most common areas being: 1. Around windows, 2. Balconies, 3. Around skylights, 4. Low-slope roofs, and 5. Interior wall surfaces. As such, there are many leak incidents in areas where tape is used, making the correct selection and application of tape essential.
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basic information
**Types and Characteristics of Waterproof Tape** There are two main types of waterproof sealing tape available in the market. **"Butyl Tape"** Composition: Support material (non-woven fabric) + Reinforcing film + Butyl rubber-based adhesive + Release liner - Long-lasting adhesion - Difficult to tear - Excellent uneven surface conformity - Adheres well to rough surfaces → High waterproof performance **"Acrylic Tape"** Composition: Poly-cross base material + Acrylic-based adhesive - High initial adhesion - Good hand-tearability - Less likely to get dirty → High workability Butyl waterproof tape has self-fusing properties, high adhesion, and flexibility, allowing it to conform to uneven surfaces, providing a strong long-term waterproof effect. Acrylic waterproof tape is easy to tear by hand, less prone to getting dirty, and easy to apply, making it highly workable. Additionally, it offers excellent cost performance. Around screws near window frames, uneven surfaces can cause the tape to lift, making it a potential pathway for water intrusion. Therefore, butyl tape, which conforms well to irregularities, is recommended. *For more details, please refer to the explanatory materials and catalog regarding waterproof tape available in the PDF catalog.*
Price range
Delivery Time
P2
Applications/Examples of results
●Window perimeter waterproofing ●Waterproofing and airtightness of sheet installation and board joints ●Indoor airtightness ●Waterproofing and airtightness of window sill corners, etc. ●Fixing of vapor barrier sheets and insulation materials ●Secondary waterproofing during the installation of window frames and sashes
Detailed information
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NO.6931
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NO.690
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NO.6922
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NO.6924
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NO.6951 (Hyper Flash)
Line up（5）
| Model number | overview |
|---|---|
| All-Day Tape No.6931 | (Single-sided strong adhesive type) It has better adhesive strength than conventional products in low-temperature areas. It has less stickiness even in summer and excellent workability. |
| All-Day Tape No.690 | (DuPont Tyvek House Wrap exclusive double-sided adhesive type) Designed specifically for Tyvek, it does not create wrinkles. |
| All-Day Tape No.6922 | (Double-sided strong adhesive type) It exhibits stable adhesive strength in all temperature ranges. It has better adhesive strength than conventional products in low-temperature areas. It follows uneven surfaces and adheres firmly. |
| All-Day Tape No.6924 | (Double-sided adhesive type) It exhibits high adhesive strength on non-woven moisture-permeable waterproof sheets in low-temperature environments. (Compared to our products) It has less stickiness even in summer and excellent workability. (Compared to our products) It follows uneven surfaces and adheres firmly. |
| Hyper Flash No.6951 | (Single-sided stretch type) It can be applied to three-dimensional shapes. It can be applied without using auxiliary materials. Since it can be applied in a three-dimensional manner, waterproof reliability is improved. |
catalog（5）
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Company information
Our company is responsible for the living environment business within the Nitto Group and is engaged in important business activities that broadly relate to the socio-economy, including MRO and infrastructure businesses. We offer a wide range of products from over 400 related manufacturers and functional processed products, and we possess the know-how to quickly respond by transforming "customer voices" into tangible solutions. "Company Overview" Company Name: Nitto L Materials Corporation Established: June 1, 1979 *Formerly known as El Nissho Co., Ltd. Name changed in 2015 Capital: 800 million yen (100% owned by Nitto Denko Corporation) Annual Sales: 12.2 billion yen (Fiscal Year 2023) Number of Employees: 100