Our 6 mil plastic film for greenhouses is designed specifically for inexpensive greenhouse use. Material lasts 4 years against UV degradation. The Clear Plastic provides light transmission comparable to glass, even when used in double layers. Resists yellowing. The slightly opaque Tufflite Infrared Plastic reduces light transmittance and diffuses the light; good choice for hotter locations or when growing more heat sensitive plants like lettuces. 4-Year limited warranty. Direct contact with PVC pipe or utilizing a single layer voids the warranty. Degradation due to wind damage, chemical contact or heat build-up is not under warranty. Refer to accompanying literature for more information.