ThermaGlas 4mm twinwall clear polycarbonate are perfect for use as replacement panels for hobby greenhouses. These ThermaGlas polycarbonate panels offer 99.5% UV protection. The light weight and shatterproof multiwall design coupled with integrated UV resistant co-extruded layer yields long service periods backed up by a 10 year limited warranty. The cellular multi-layer structure reduces heating costs in winter while minimizing excessive heat in summer. A special coating on the bottom side eliminates condensation dripping. Blocks ultraviolet rays that burn plants and living tissues, and transmits only beneficial radiation. 4mm Thickness for double wall 82% light transmission Superb thermal insulation - saves energy 10 year limited warranty against UV degradation Impact resistance - virtually unbreakable Approx. Weight: .16 lbs per sq. ft. Low flammability (available with CC1 rating) R-Factor: 1.49; U-Factor: 0.67 Will Call Pick-UpSave on shipping by picking up your polycarbonate order. Certain sizes are stocked for pick-up at our Illinois and Wisconsin locations Call 1-888-281-9337 to order and schedule pick-up Schools & InstitutionsPurchase orders are accepted from schools and institutions. Contact a representative by email at [email protected] or by phone at 1-888-281-9337 to place an order with a PO. Automatic SavingsNo coupon code required — discounts apply automatically in your cart: 5% off orders over $5,000 on Polycarbonate Sheets! 10% off orders over $10,000 on Polycarbonate Sheets! Additional InformationThermaGlas Assembly & Storage Guide (PDF)Multi-wall Polycarbonate Installation Instructions (PDF)ThermaGlas Technical and Installation Guide (PDF)ThermaGlas Limited Warranty (PDF) Can I order precut 4mm clear twinwall polycarbonate panels from Greenhouse Megastore? Yes, 4mm clear twinwall polycarbonate panels are available in precut 2ft by 6ft sizes and ship via FedEx. For custom sizes outside these measurements, please inquire for further options.
