Once installed the EPDM washer prevents water ingress.
TIMCO Advanced Coach Screw | Hex Flange Head | Slash Point | Yellow | 8.0 x 120 | Box of 50 (8120SCSY)
SELF-TAPPING SLASH POINT HEX HEAD SCREWS GASH POINT SCREWS 6.3mm x 25-100mm
6.3x25 Self Tapping Slash Point Hex Head Screw Point Screw With Washer Tec x 100
Timco Presser Point Staples Nails Loose Nail Corrosion Resistant Copper 25x2.65
Timco Presser Point Staples Fixing Wire Mesh Galvanised 0.5-25kg Various Sizes
Timco - Presser Point Staples - Galvanised (Size 40 x 4.00 - 0.5 Kilograms)