During the procurement of steel structure enclosure components, customers often inquire about manufacturer qualifications, product differences, after-sales support, and other issues. We have compiled a list of frequently asked questions for industry clients’ reference.

Q1: Are you a manufacturer or a trader, and what are your qualifications? A: We are a professional, system-oriented supplier of steel structure components, representing international brands such as ITW Group’s Buildex self-drilling screws from the United States and Australia’s Dektite waterproof flashings. At the same time, we also offer our own JUNQIN natural ventilation product line. All partner brands are officially authorized by their manufacturers, and we can provide letters of authorization and certificates of origin.

Q2: What are Junqin’s core advantages? A: ① An international brand portfolio: We exclusively work with world-class brands and reject low-end, generic products; ② System-level solutions—providing fasteners, waterproofing, insulation, and sealing all in one package, reducing customers’ costs associated with coordinating multiple suppliers; ③ Global online technical services.

Q3: Do you only sell individual items, or can you provide complete technical solutions? A: We can supply individual components or offer bundled quotations for entire systems. Upon receiving drawings or technical specifications from the customer, our technical team will propose construction detail recommendations and provide comprehensive services covering product selection, system integration, technical guidance, and after-sales support.

Q4: What is the difference between Buildex self-drilling screws and domestically produced screws? A: Buildex screws feature higher drill-bit hardness, preventing overheating and increasing installation efficiency; their EPDM washers resist UV degradation for up to 25 years; and their coating process meets ASTM standards, making them suitable for coastal and highly corrosive chemical environments.

Q5: How long do Dektite waterproof flashings last, and how is leakage addressed? A: Designed for a service life of 25 years, with a 25-year warranty from the manufacturer; we offer 24/7 response, and in cases of non‑human‑caused damage, technicians can be dispatched within 48 hours to conduct on-site inspections and provide tailored solutions.

Q6: What distinguishes butyl tape from ordinary tape? A: Butyl tape consists of butyl rubber combined with aluminum foil, offering weather resistance for over 20 years; in contrast, standard PVC or foam tapes harden and lose effectiveness after just 1–2 years. For long-term roof waterproofing, butyl-based sealing materials are the preferred choice.

Q7: Do your products come with third-party test reports? A: For the brands we represent, we can provide original factory COA reports. Upon request, we can arrange fire resistance, wind uplift resistance, corrosion resistance, and REACH/ROHS testing. For large projects, we can commission SGS or CTI for independent third-party retesting.

Q8: How do you handle quality issues? A: We respond promptly within 48 hours, issue a detailed problem analysis report identifying whether the issue stems from the product, installation, or design, and remain committed to “customer first, service foremost.”