316 Stainless Steel Neoprene EPDM Sealing Washers

Why choose 316 stainless for sealing washers?

316 stainless adds molybdenum for far better resistance to salt and chloride pitting than 18-8 or 304, so a 316 bonded sealing washer keeps both its structural backing and corrosion resistance in coastal, marine, and chemical environments. The EPDM ring compresses to seal the hole against water while the passivated 316 washer carries load without rusting where lesser grades would fail. This suits waterfront roofing, marine structures, pool enclosures, and industrial cladding exposed to chemicals. Pair it with 316 stainless screws so the whole assembly shares the same corrosion resistance. Do not overdrive the screw, which can distort the seal.

Why choose 316 stainless neoprene EPDM sealing washers

• Marine-grade corrosion resistance: molybdenum-alloyed for salt and chlorides.
• Watertight seal: bonded EPDM seals the hole against moisture.
• Non-staining: will not rust-streak the roof or panel.
• Weather resistant: EPDM resists UV, ozone, and temperature swings.

Common applications for 316 sealing washers

• Coastal and marine roofing
• Pool enclosures and waterfront structures
• Chemical-plant and industrial cladding
• Saltwater-exposed weatherproof fastening

For general outdoor use, see 18-8 stainless neoprene EPDM sealing washers, and browse every option on the main sealing and cushioning washers category.

316 Stainless Neoprene EPDM Sealing Washers FAQ

Why choose 316 over 18-8?

316 adds molybdenum for much better resistance to salt and chloride pitting, making it the choice for coastal, marine, and chemical roofing where 18-8 could corrode.

Which way does the rubber face?

The rubber faces down, toward the mating surface, so it compresses against the material and around the screw to seal out moisture.

Can I overdrive the screw?

Avoid overdriving, which distorts the rubber and can break the seal. Drive until the EPDM compresses evenly around the hole.