The long-term durability of light steel structure buildings depends on two core supporting materials: fasteners and sealing/waterproofing products. Shanghai Junqin Building Materials represents and directly sells a full range of enclosure-related products; below, we provide technical explanations of the key product categories.
1. ITW Buildex Self-Tapping, Self-Drilling Screws
Buildex fasteners comply with Australian AS3566 standards, international standards, and Chinese national standards, and have obtained ISO9001 certification. The products undergo multiple manufacturing processes, including drill-tail forming, heat treatment, mechanical galvanizing, and coating treatments, making them suitable for securing color-coated steel roofing and wall purlins. Compared to ordinary domestically produced screws, Buildex screws feature higher drill-tail hardness, form in one step without burning out the drill bit, and boost installation efficiency by over 30%. Paired with EPDM rubber washers that resist UV degradation for 25 years, and with a galvanizing process meeting ASTM standards, these screws can be used directly in coastal areas, chemical plants, and other highly corrosive environments.
2. Waterproof Rivets (Closed-End Pull-Rivet)
After riveting, the closed-end pull-rivet fully encloses the rivet core, delivering excellent air- and water-tightness, high shear strength, and convenient single-sided installation. It effectively blocks fluid penetration pathways, providing waterproof and dustproof protection, and is ideal for ship cabins, shipping containers, electrical control cabinets, rail transit equipment, as well as confined spaces where double-sided riveting is not feasible. With outstanding vibration resistance, it helps prevent equipment malfunctions caused by rivet core detachment.
3. Butyl Sealing Tape and Butyl Pressure-Sensitive Adhesive
Butyl tape uses butyl rubber as its primary material and is an environmentally friendly, non-curing, self-adhesive waterproof sealing material. It withstands a wide temperature range from ‑40°C to 120°C, resists UV radiation and aging, and boasts a service life of over 20 years. Unlike ordinary PVC or foam tapes, it does not harden and lose effectiveness within 1–2 years, making it especially suited for sealing board joints. Butyl pressure-sensitive adhesive is also a non-curing sealant with strong deformation-following capabilities, adapting to thermal expansion and contraction. It is widely used for filling gaps in steel roofs, repairing roof waterproofing, and sealing expansion joints in shipping containers and building doors and windows.
4. Dektite Waterproof Cover Plates
Dektite waterproof cover plates are made from specially modified EPDM/TPE rubber, capable of withstanding temperatures from ‑50°C to 150°C, with intermittent exposure up to 150°C. They are designed for a service life of 25 years and come with a 25-year warranty from the Australian factory. These plates are used to provide waterproof sealing at points where pipes, heating/air-conditioning systems, and electrical exhaust ducts pass through roofs. Compared to traditional methods, they offer easy installation, require no maintenance, deliver superior sealing performance, reduce noise and vibration, and are compatible with most roof profiles.
Junqin Building Materials provides free samples of standard components (with shipping costs borne by the customer). All agency-branded products come with original COA factory inspection reports, and we can also assist customers in obtaining third-party certifications such as fire resistance ratings, wind uplift resistance, corrosion resistance, and ROHS/REACH compliance.
