Mariner Black/White Poly Roll – Poly Film For Greenhouses

Bulk black-and-white poly sheeting for lining and light-proofing

This Mariner black/white poly roll is a dual-layered reflective sheet - white on one face to lift light levels in the growing area, black on the other to block light from escaping or entering - supplied as a 100 metre roll, 2 metres wide, in a Thick (light-tight) or Thin gauge. Sold by the roll, it suits lining a large grow room, sealing off a partition wall, or stocking up for multiple builds.

Key Benefits

• 100m x 2m roll for large-scale lining or multiple builds from one roll
• Dual-layer black/white construction - white face reflects light, black face blocks it
• Thick gauge is fully light-tight, for a room that must not leak light in or out
• Thin gauge for lighter-duty lining where full light-tightness isn't essential

Sealing a Room Properly

Light leaking into or out of a flowering room disrupts the dark period and can affect flowering response; light leaking out of a vegetative or propagation area wastes reflected light that should be bouncing back onto the canopy. A heavier, light-tight sheet solves both at once, while the thinner gauge is a cheaper option for partitions and areas where full blackout isn't critical.

How to Use

• Cut to length from the roll to line walls, ceilings or partitions
• Fix with staples, tape or batten strips, white side facing into the growing area
• Overlap and tape joins to keep the room light-tight, particularly with the Thick gauge