FAQ

▍Q: What makes HQ-3590's 36% VLT the ideal balance between privacy and visibility?

A: At 36% VLT, HQ-3590 sits in the sweet spot — dark enough to reduce glare, enhance styling, and provide meaningful in-cabin privacy, yet light enough to maintain safe nighttime visibility. Combined with 90% infrared rejection and 96% UV blocking through nano ceramic technology, it delivers privacy, heat protection, and interior preservation in one balanced package. It is one of KOOFILM's most popular VLT levels for daily-driven vehicles.

▍Q: How effective is HQ-3590's 90% IRR at keeping the car cool in real-world conditions?

A: HQ-3590 achieves 90% infrared rejection through nano ceramic particles that selectively block infrared wavelengths — the heat-carrying portion of sunlight — while allowing visible light at the rated VLT. In practice, a vehicle with HQ-3590 on all side and rear windows experiences significantly reduced cabin temperature on hot days, less air conditioning strain, and reduced interior fading. The film provides year-round benefit: heat rejection in summer, and improved heat retention through glass in cooler months.

▍Q: Will HQ-3590 interfere with GPS, mobile signals, Bluetooth, or keyless entry?

A: No. HQ-3590 uses non-metallic nano ceramic technology that is completely signal-transparent. GPS navigation, mobile phone reception, Bluetooth, TPMS, and keyless entry all function normally. This is a key advantage of ceramic film over older metallized products — strong heat rejection without sacrificing any connectivity, which is essential in modern vehicles packed with wireless systems.

▍Q: Is 36% VLT legal for front side windows in my country?

A: Window tint laws vary significantly by jurisdiction. At 36% VLT, HQ-3590 meets requirements in many regions for front side windows (which often mandate 35%+), but some require 50% or 70%+. Always verify local regulations before installation. For stricter jurisdictions, consider HQ-7590 (76% VLT) or HQ-70100 (70% VLT) for front windows — they provide strong IR/UV protection while maintaining legal compliance.