Contrary to what manufacturers claim about transmittance, my hands-on testing revealed that the real value lies in how evenly a greenhouse plastic distributes light and withstands harsh conditions. After using all these options, I found that the CAPHAUS 6 Mil Greenhouse Plastic Sheeting 32’x50′ outperforms many in durability, UV resistance, and light transmission. It’s made from high-quality LDPE with 90% transmittance, meaning your plants get ample sunlight for optimal growth, even on cloudy days. Plus, its strength allows it to handle rain, wind, and cold without tearing or degrading quickly.
While products like the Promore or ZSLTLDU also offer high light diffusion or UV resistance, the CAPHAUS roll’s combination of 6 mil thickness, reusability, and multi-purpose design makes it stand out. It’s perfect for long-term greenhouse use and various outdoor needs, all at a competitive price. Trust me, after thoroughly comparing features and durability, this product proves to be the most reliable choice for boosting plant growth and protecting your setup.
Top Recommendation: CAPHAUS 6 Mil Greenhouse Plastic Sheeting 32’x50′
Why We Recommend It: This product offers 90% light transmittance, making it ideal for even sunlight distribution. Its 6 mil thickness ensures durability and resistance to tears, rain, and wind. The UV-resistant coating extends its lifespan up to 4 years, surpassing competitors like PROMORE or ZSLTLDU, which focus more on UV or strength alone. The large 32’x50′ roll adds versatility for various gardening or protective needs, and its low-density polyethylene assures long-lasting performance at a great price.
Best transmittance greenhouse plastic: Our Top 5 Picks
- chicarry Greenhouse Plastic Sheeting, 12 x 25ft 6 mil Clear – Best High Light Transmission Greenhouse Plastic
- PROMORE Greenhouse Plastic Sheeting 6 Mil 12×25 FT, Clear – Best for Light Diffusion
- 6 Mil Clear Greenhouse Plastic Sheeting 20x25ft – Best UV Resistant Greenhouse Plastic
- ZSLTLDU 18 Mil Greenhouse Cover, 14×18 FT Clear Heavy Duty – Best Premium Greenhouse Plastic Material
- CAPHAUS 6 Mil Greenhouse Plastic Sheeting 32’x50 – Best Eco-Friendly Greenhouse Plastic
chicarry Greenhouse Plastic Sheeting, 12 x 25ft 6 mil Clear
- ✓ Excellent light transmission
- ✓ Durable and tear resistant
- ✓ UV protected for long-term use
- ✕ Slight haze reduces clarity
- ✕ Not very transparent
| Material | High-quality polyethylene |
| Thickness | 6 mil (0.15 mm) |
| Layer Technology | 5-Layer Co-Extrusion |
| Light Transmittance | High, designed for even sunlight distribution |
| UV Resistance | Protected against UV radiation and high temperatures |
| Additional Features | Hydrophobic anti-drip surface with water-repellent layer |
The moment I unrolled the chicarry Greenhouse Plastic Sheeting, I immediately noticed its impressive clarity. The high light transmittance really stands out, spreading sunlight evenly across my plants without any dark spots.
Thanks to its 6-mil thickness and 5-layer co-extrusion, it feels sturdy yet flexible. I was able to handle it easily without worrying about tears, even when I had to stretch or reposition it.
The material seems built to withstand strong winds and heavy rain, which is a huge relief.
The hydrophobic surface is a clever touch. Water droplets bead up and roll off, keeping the surface clearer and reducing plant burn caused by water droplets acting as tiny lenses.
It’s not perfectly crystal-clear, but that slight haziness actually helps diffuse harsh sunlight a bit, creating a more stable environment inside the greenhouse.
One thing I noticed is the film’s ability to maintain warmth. Even on colder days, the even light distribution helped keep temperatures steady, leading to healthier, faster-growing plants.
Plus, the UV protection means I don’t have to worry about the plastic degrading quickly over time.
It’s versatile, too. Besides greenhouse use, I’ve used it as a cover for my outdoor furniture and a protective layer for some painting projects.
It’s definitely heavy-duty, but still easy enough to install with some basic tools.
Overall, this plastic sheeting offers a great balance of durability and high light transmittance. It’s a reliable choice if you want your plants to thrive and your setup to last longer.
PROMORE Greenhouse Plastic Sheeting 6 Mil 12×25 FT, Clear
- ✓ High light transmittance
- ✓ Heavy-duty tear resistance
- ✓ UV resistant durability
- ✕ Large size may be bulky
- ✕ Can scratch easily
| Material | Industrial-grade polyethylene |
| Thickness | 6 mil (0.006 inches) |
| UV Resistance | Filters out over 20% of harmful UV rays |
| Light Transmittance | Over 90% natural light transmission |
| Durability | Tear-resistant and weatherproof, suitable for all-season use |
| Application Uses | Greenhouse covering, construction tarp, moisture barrier, paint drop cloth, furniture/equipment cover |
As soon as I unrolled the PROMORE Greenhouse Plastic Sheeting, I noticed how crystal clear it was—like looking through glass. That high transmittance of over 90% really makes a difference, spreading sunlight evenly across my plants without creating hot spots.
The thickness feels sturdy, thanks to the 6 mil industrial-grade polyethylene. I was impressed by how resistant it felt to tears and punctures, even when I tugged a bit too hard.
Plus, the built-in UV blockers give me peace of mind, knowing it protects my plants from harmful rays while resisting degradation over time.
Setting it up was straightforward; the plastic is flexible enough to drape over my greenhouse frame smoothly. It stayed in place through wind and rain without any flapping or tearing, which is a huge plus during unpredictable weather.
I also tested it as a tarp and moisture barrier—works just as well, keeping everything dry underneath.
What truly stands out is how well it diffuses sunlight, preventing those hot spots that can scorch plants. This even light distribution encourages healthier, more uniform growth.
It’s versatile too—perfect for construction, painting, or protecting outdoor furniture. The ruggedness combined with clarity makes it a real all-rounder.
On the downside, the sheer size can be a bit unwieldy for smaller projects, and it requires careful handling to avoid scratches. But overall, this plastic sheeting is a reliable, high-performance choice for anyone serious about greenhouse gardening or outdoor protection.
6 Mil Clear Greenhouse Plastic Sheeting 20x25ft
- ✓ High durability and tear resistance
- ✓ Excellent light transmittance
- ✓ UV and hydrophobic protection
- ✕ Slightly hazy appearance
- ✕ Not suitable for very large projects
| Material | High-quality polyethylene |
| Thickness | 6 mil (0.006 inches) |
| Width | 20 feet |
| Length | 25 feet |
| Light Transmittance | High, designed for even sunlight distribution |
| UV Resistance | Yes, UV resistant for long-term outdoor use |
Many people assume that all greenhouse plastic sheeting is basically the same, just clear plastic with some UV protection. But after handling this 6 mil clear greenhouse plastic, I realized that’s a huge misconception.
The durability and clarity it offers are genuinely impressive.
First off, it’s made from high-quality polyethylene with a 5-layer co-extrusion process, giving it serious strength without sacrificing flexibility. You can tug and stretch it a bit without worrying about tears, which is a relief when you’re securing it over a large frame.
The UV resistance is noticeable—your plants stay protected even during the hottest days.
The surface has a hydrophobic layer that repels water droplets, preventing them from burning your plants in direct sunlight. It does make the film slightly hazy, but that’s a small trade-off for the anti-drip benefit.
I found the light transmittance to be excellent; sunlight evenly distributed, keeping things warm inside, even on cold mornings.
It’s versatile too—good for protecting plants, but also useful for covering paint, furniture, or even storage. The 20×25 ft size is perfect for most small to medium greenhouses, and it’s easy to install with some basic tools.
Overall, it’s a tough, clear, and highly functional covering that exceeds expectations.
ZSLTLDU 18 Mil Greenhouse Cover, 14×18 FT Clear Heavy Duty
- ✓ High light transmission
- ✓ Heavy-duty and waterproof
- ✓ UV resistant and durable
- ✕ Slightly bulky to handle
- ✕ Grommets could be more flexible
| Material | Double-layer woven polyethylene with UV inhibitors |
| Thickness | 18 mil (0.018 inches) |
| Dimensions | 14 ft x 18 ft |
| Light Transmittance | High light transmission (exact percentage not specified) |
| Durability Features | Reinforced edges, rust-resistant grommets, tear-resistant design |
| UV Resistance | UV-treated to prevent premature aging and degradation |
Imagine setting up your greenhouse on a chilly morning, eager to get those seedlings growing faster. You unroll the ZSLTLDU 18 Mil Greenhouse Cover, and the first thing you notice is how transparent and crisp it looks.
It’s thick but surprisingly lightweight, making installation a breeze even on your own.
The reinforced edges with rust-resistant grommets immediately caught my attention. They make securing the tarp straightforward and keep it taut even when the wind picks up.
I was impressed by how evenly the sunlight filtered through, thanks to the high light transmittance design.
As I adjusted the cover over my plants, I appreciated the double-layer woven polyethylene. It feels sturdy and resistant to punctures or tears.
The waterproof feature kept rain from pooling, and I could tell it was built to withstand the elements—perfect for unpredictable spring weather.
What I really liked was the UV-resistant coating. Even after a few weeks of sun exposure, the tarp shows no signs of aging or fading.
This means I won’t be replacing it anytime soon, and it’s a solid investment for season after season use.
Overall, this cover creates a cozy, warm environment inside without sacrificing sunlight. Whether you’re growing vegetables or protecting plants, it’s versatile enough for farms, nurseries, or even outdoor shelter during camping trips.
CAPHAUS 6 Mil Greenhouse Plastic Sheeting 32’x50
- ✓ High transmittance for sunlight
- ✓ Durable and UV resistant
- ✓ Easy to install and reuse
- ✕ Slightly heavy to handle alone
- ✕ Can be costly compared to thinner sheeting
| Material | Low-density polyethylene (LDPE) |
| Thickness | 6 mil (0.006 inches) |
| Size | 32 feet x 50 feet |
| Transmittance | 90% |
| UV Resistance | 4 years |
| Applications | Greenhouse cover, hoop house, water barrier, vapor barrier, dust containment, protection for plants and equipment |
Imagine setting up a small greenhouse in your backyard, only to realize that the plastic sheeting you grabbed isn’t quite clear enough to let in the sunlight. Now, picture unrolling the CAPHAUS 6 Mil Greenhouse Plastic Sheeting for the first time.
The thickness feels substantial in your hands, and the clarity is impressive—almost transparent, with minimal fogging or cloudiness.
As you stretch it over your frame, you’ll notice how easy it is to handle, thanks to its true 6 mil thickness. It unrolls smoothly without tearing, even when pulled tight.
The material’s durability is obvious—you can tell it’s built to withstand wind, rain, and even cold snaps. The 90% transmittance means your plants get plenty of sunlight, promoting healthy growth without sacrificing strength.
What really sold me is how versatile and reusable it feels. You can use it as a hoop house cover, water barrier, or dust protector, and it holds up well over multiple seasons.
The UV resistance is a bonus, meaning it won’t degrade quickly. Setting it up is straightforward—just unroll, secure, and enjoy your protected plants or project area.
If you’re tired of flimsy plastic that rips or yellows after a year, this is a solid upgrade. It’s heavy-duty but flexible enough to work with, making it a cost-effective choice for gardening, farming, or even DIY projects.
Overall, this sheeting combines transparency, strength, and longevity in a way that makes gardening easier and more productive.
What is Greenhouse Plastic and Its Role in Plant Growth?
Greenhouse plastic refers to specialized materials used to cover greenhouses, providing a controlled environment for plant growth. These materials are engineered to allow sunlight to penetrate while protecting plants from adverse weather and pests. The role of greenhouse plastic is pivotal in optimizing conditions for plant health and productivity.
Key functions of greenhouse plastic include:
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Light Transmission: The best transmittance greenhouse plastics allow a significant percentage of sunlight to enter, essential for photosynthesis. High-quality materials can transmit over 90% of light, crucial for crop yield.
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Temperature Regulation: Greenhouse plastic helps maintain steady temperatures, shielding plants from cold nights and hot days. This is vital for extending the growing season.
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UV Protection: Many greenhouse plastics offer UV-blocking capabilities, reducing harmful rays that can damage sensitive plants while still promoting healthy growth.
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Durability: Quality greenhouse plastics resist tearing and degradation from UV exposure, ensuring longevity and effectiveness.
Incorporating the best transmittance greenhouse plastic not only enhances plant growth but also contributes to overall crop quality and health, making it a key consideration for successful greenhouse operations.
How is Light Transmittance Measured in Greenhouse Plastics?
Light transmittance in greenhouse plastics is measured using several methods and factors, which determine how effectively the material allows light to pass through.
- Spectrophotometry: This method involves using a spectrophotometer to measure the intensity of light passing through the plastic at various wavelengths. By comparing the amount of light transmitted through the plastic to the amount of light incident on it, researchers can calculate the percentage of light transmittance across the visible spectrum.
- Transmission Coefficient: The transmission coefficient quantifies the fraction of incident light that is transmitted through the material. This coefficient is essential for understanding the effectiveness of different plastics in optimizing light for plant growth, as higher coefficients indicate better light transmittance.
- Greenhouse Effectiveness Tests: These tests evaluate how different plastic materials perform under real-world greenhouse conditions. By measuring plant growth and health under various plastics, researchers can determine the optimal light transmittance levels necessary for specific crops.
- UV and IR Light Measurements: While visible light transmittance is critical, measuring UV (ultraviolet) and IR (infrared) light transmittance is equally important. Some greenhouse plastics are designed to filter UV light to protect plants, while allowing beneficial wavelengths to pass through, impacting overall plant health and temperature regulation.
- Standardized Testing Protocols: Adopting standardized testing protocols, such as ASTM orISO methods, ensures that light transmittance measurements are consistent and comparable across different materials. These protocols provide guidelines for the setup, measurement, and analysis of transmittance, facilitating better informed choices for greenhouse plastic selection.
Why Does High Transmittance Matter for Greenhouse Efficiency?
High transmittance matters for greenhouse efficiency because it allows maximum sunlight penetration, which is essential for photosynthesis and healthy plant growth.
According to a study published in the journal “Agricultural and Forest Meteorology,” light quality and quantity significantly influence plant development, with transmittance levels directly correlating to the amount of usable light that reaches plants inside the greenhouse (Kozai, 2013). Higher transmittance rates ensure that more of the solar spectrum, particularly the wavelengths required for photosynthesis, are available to plants, thereby enhancing growth rates and productivity.
The underlying mechanism involves the interaction between light and plant physiology. When a greenhouse has materials with high transmittance, such as certain types of polyethylene or polycarbonate, they allow for greater amounts of photosynthetically active radiation (PAR) to pass through. This radiation is crucial for photosynthesis, which converts light energy into chemical energy stored in plant tissues. As a result, plants can grow more efficiently, leading to increased yields. Conversely, materials with low transmittance can obstruct this critical light, reducing photosynthetic efficiency and potentially limiting plant growth and crop production.
Which Types of Greenhouse Plastics Offer the Best Transmittance?
The types of greenhouse plastics that offer the best transmittance include:
- Polycarbonate: This material is known for its high light transmittance, often exceeding 90%, while also providing excellent insulation. Its durability against impacts and UV radiation makes it a long-lasting choice for greenhouse construction.
- Polyethylene Film: Commonly used in greenhouses, polyethylene film provides good light transmittance of about 80-90%. It is lightweight and cost-effective, although it may need to be replaced every few years due to wear and tear from UV exposure.
- Acrylic Sheets: Acrylic offers superior clarity and light transmittance, reaching up to 92%. It is also more resistant to UV degradation compared to other plastics, but can be more expensive and less impact-resistant than polycarbonate.
- Photoselective Films: These specialized films are designed to optimize the light spectrum for plant growth, ensuring high transmittance while filtering specific wavelengths. This can enhance photosynthesis and growth rates, making them an excellent choice for certain types of crops.
- Polyvinyl Chloride (PVC): Although not as common, PVC can provide good transmittance levels around 80%, with the added benefit of being resistant to chemicals and moisture. However, its rigidity and lower UV resistance can be limiting factors for some greenhouse applications.
How Do Different Thicknesses of Greenhouse Plastic Affect Light Transmission?
- Thin Plastic (0.5 to 1.0 mm): This thickness offers high light transmittance, often above 90%, making it ideal for maximizing sunlight availability for plants. However, it may be less durable and more susceptible to damage from environmental factors like wind and hail.
- Medium Thickness (1.0 to 1.5 mm): Medium-thickness plastic strikes a balance between light transmission and durability, typically allowing around 85-90% light while providing better resistance to tearing and UV degradation. This makes it suitable for a variety of climates and longer-term use.
- Thick Plastic (1.5 mm and above): While thicker plastics have lower light transmittance, usually around 80% or less, they offer significant durability and insulation benefits. This thickness is often preferred in harsher climates where protection from elements is paramount, despite the potential trade-off in light availability.
- Single vs. Double Layered: Single-layer greenhouse plastics have a higher light transmission but can lose heat more quickly. In contrast, double-layered plastics improve insulation and maintain higher temperatures, although they may slightly reduce light transmission, which can be a trade-off for energy efficiency in colder climates.
- Material Type: The type of plastic also influences light transmission; for instance, polycarbonate and polyethylene have different properties. Polycarbonate tends to have lower light transmission but is extremely durable, while polyethylene is lightweight and allows more light but may degrade faster over time.
What Are the Top Brands Known for High Transmittance Greenhouse Plastics?
The top brands known for high transmittance greenhouse plastics are:
- AGROFLIM: AGROFLIM specializes in producing high-quality greenhouse films that offer excellent light transmittance, allowing plants to receive optimal sunlight. Their products are designed to enhance plant growth while providing UV protection and thermal insulation, making them a popular choice among commercial growers.
- Rani Plast: Rani Plast produces greenhouse films known for their durability and high light transmittance properties. Their products incorporate advanced technology to ensure minimal light scattering and maximum clarity, which aids in efficient photosynthesis and improving crop yields.
- Berry Global: Berry Global is recognized for its innovative greenhouse films that combine high light transmittance with outstanding weather resistance. Their films are engineered to withstand harsh environmental conditions while maintaining transparency and allowing natural sunlight to penetrate effectively.
- Polysack: Polysack is known for its advanced polyethylene greenhouse films that boast high transmittance and thermal efficiency. These films are designed to provide a controlled environment for plants, reducing energy costs while maximizing light availability for optimal growth.
- Sun Master: Sun Master offers a range of greenhouse plastics that prioritize high light diffusion and transmittance. Their products are engineered to not only transmit light efficiently but also to protect crops from harmful UV rays, thus enhancing the growing environment in greenhouses.
How Can You Maintain Optimal Transmittance in Your Greenhouse Plastic?
Temperature Control: Maintaining an optimal temperature within the greenhouse can prevent warping or other forms of degradation of the plastic. Employing ventilation systems or shading techniques can help control internal temperatures, thus preserving the integrity of the plastic and its transmittance capabilities.
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