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Film / Mylar

Reflective sheeting and mylar for every indoor grow space

Adding reflective sheeting or mylar to your grow room walls is one of the most cost-effective upgrades available — redirecting up to 30 percent more usable light back to your canopy without increasing energy consumption. White film provides 85–90 % even reflection, while silver mylar reaches 95–97 % for maximum efficiency.

Both materials are waterproof, tear-resistant and easy to cut and install with tape or staples. Pair them with proper ventilation to prevent moisture buildup behind the sheeting. A practical investment for any Belgian grower looking to boost yield from existing grow lighting. Fast delivery across Belgium.

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Mylar Diamond Black 1.2x30m 94% reflection lightproof grow room | Film / Mylar

Mylar Superplant Diamond Black 1.2 x 30m

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EasyGrow Film 120mu 10m black white thick reflection roll | Film / Mylar

Black/White Foil 120mu 10 meter

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Our reflective sheeting and mylar range

At Plant & Flower, your Belgian grow shop since 2011, we stock reflective sheeting and mylar to transform any dark space into an efficient growing environment. These materials bounce wasted light back to your plants, effectively increasing lumen usage without extra power consumption. While ready-made grow tents already feature reflective interior walls, DIY spaces (closets, spare rooms, custom-built areas) require proper lining to unlock your lighting's full potential.

Why reflection makes such a difference

Without reflective surfaces, dark walls or rough surfaces absorb up to 50 % of the light your lamp produces. That energy goes to waste — plants at the edge of the canopy receive only a fraction of what they could capture. Reflective sheeting and mylar redirect this light back to the growing zone, resulting in improved growth and higher yields using the same LED grow lights or HPS fixtures. In practice, growers see up to 30 % more usable light — a substantial gain that costs nothing extra in electricity.

White film versus silver mylar: which to choose?

Both materials have distinct strengths. White film (typically black-white with a black back for light-tightness) offers 85-90 % reflection with even distribution and no hotspots. Silver mylar reaches 95-97 % but may create uneven reflection when creased or wrinkled. For most hobby growers, black-white film is the practical and durable choice. Professional-grade mylar (like Superplant Diamond with embossed pattern) remains unbeatable in raw reflectance when installed taut and wrinkle-free.

Mylar Superplant Diamond Black 1.2 × 30 m — diamond pattern, 95-97 % reflection, opaque black back
Black-white foil 120 µ / 10 m — thick film (120 microns), 85-90 % reflection, tear-resistant
Reflection: 85-97 % depending on material and installation tension
Waterproofing: fully sealed, wipeable between grows
Cutting: with scissors or utility knife, adapts to any layout

Installation and maintenance

Attach the sheeting tightly against walls and ceiling using double-sided tape, wall staples or wooden strips. The goal: a smooth surface without folds or air bubbles, because every imperfection reduces reflection uniformity and can create localised heat spots. Leave a 5-10 cm gap at the bottom for air circulation — this prevents moisture buildup behind the sheeting, particularly when room humidity exceeds 60 %. Pair the lining with proper ventilation and a carbon filter for a complete, high-performing and odour-free grow space. Between grows, clean the sheeting with warm water and a soft sponge; avoid abrasive cleaners that dull the reflective surface.

FAQ - Frequently asked questions about reflective sheeting and mylar

What is the difference between white film and silver mylar?

White film reflects 85-90 % of light with even distribution and no hotspots. Silver mylar reaches 95-97 % but may cause uneven reflection when creased. For most grow setups, white film remains the practical choice; mylar suits careful installers who want maximum output.

How much extra yield does reflective sheeting provide?

Reflective sheeting helps you utilise up to 30 % more of your lamp output onto the canopy. This translates directly to better growth and larger harvests without increasing energy costs. Side lighting benefits most noticeably, where direct illumination has a harder time reaching the leaves.

How do I attach reflective sheeting to walls?

Use double-sided tape, staples or wooden strips to secure the material tightly. Ensure the sheeting lies flat without folds or air bubbles. Leave a 5-10 cm opening at the bottom for air circulation to prevent moisture buildup and condensation.

Do I need reflective material in a grow tent?

No, grow tents already have reflective interior walls (typically 95 % mylar or tear-resistant reflective fabric). Reflective sheeting and mylar on the roll are intended for custom grow rooms, closets or spaces where you need to line the walls yourself for optimal light reflection.

Can I use aluminum foil instead of mylar?

Kitchen aluminum foil is not a suitable alternative. It wrinkles easily, creates localised hotspots that can burn leaves, and reflects less efficiently than professional grow sheeting (only 60-70 %). Invest in proper reflective material for better and safer results.

What thickness should I choose for a durable install?

For permanent installations, opt for 120-micron film like the 120 µ black-white foil: this thickness resists tears and handles repeated assembly-disassembly. For temporary use or a removable closet, 70-85 microns is sufficient. Diamond mylar is thinner but strengthened by its embossed pattern.

Boost light efficiency in your grow space with our reflective sheeting and mylar. Fast and discreet shipping throughout Belgium.