Easy Ship ThermaGlas 4mm Clear Twinwall Polycarbonate Panel

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-Up
Save 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 & Institutions
Purchase 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 Savings
No 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 Information
ThermaGlas Assembly & Storage Guide (PDF)
Multi-wall Polycarbonate Installation Instructions (PDF)
ThermaGlas Technical and Installation Guide (PDF)
ThermaGlas Limited Warranty (PDF)