Shop dome washers purposely-designed for polycarbonate roof sheeting.
Available in 25mm and 32mm outside diameters, the large footprint helps support the sheet around the fixing.
Made from high quality non-conductive thermoplastic elastomer (TPE), the large dome spreads the screw pressure over a wider area, helping to better protect the sheet when compared to smaller washers.
When installing polycarbonate roof sheeting, don’t risk it. Always choose dome washers designed for polycarbonate.