Stainless steel wood screws with mounted EPDM washers are used for waterproofing roofs. Why?
What are wood screws with EPDM-washers?
These screws can guarantee a perfect watertight seal with their AISI 304 stainless steel and pre-assembled EPDM-washers. EPDM rubber (ethylene – propylene – diene monomer M-class rubber) is a type of synthetic rubber. It is a terpolymer of ethylene, propylene and a diene-component and it’s closely related to ethylene propylene rubber.
EPDM rubber: compatible or not?
EPDM exhibits satisfactory compatibility with:
- fireproof hydraulic fluids
- ketones
- hot and cold water
- alkalis
And it exhibits unsatisfactory compatibility with most:
- oils
- gasoline
- kerosene
- aromatic and aliphatic hydrocarbons
- halogenated solvents
- concentrated acids.
EPDM rubber: main properties
Typical properties of EPDM vulcanizates are given below. Indeed, the main properties of EPDM are its:
- outstanding heat, ozone, and weather resistance
- resistance to polar substances and steam
- excellent electrical insulating properties
- good resistance to ketones, ordinary diluted acids, and alkalies.
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