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Products and materials for fasteners and metalware manufacturing.

 

EPDM Bonded Sealing Washer


Application of washers bonded with EPDM rubber

Washer with EPDM gasket structurally consists of two elements - steel washer and gasket made of ethylene propylene diene monomer, one of the types of synthetic weather-resistant durable rubber EPDM, which has high elasticity and stable consistency during pressing.

The advantages of using weather-resistant rubber EPDM as a sealing gasket are indisputable in comparison with simple rubber:

  • EPDM rubber is very flexible and does not flow at the pressure. Due to this, the gasket does not flatten forcibly under the pressure washer.
  • EPDM gasket does not change its shape over a long period of time, which ensures perfect tightness.
  • Gasket made of EPDM fits noticeably better even when screwing in the roofing screws at an angle.
  • EPDM contains no sulfur compounds and therefore resistant to ultraviolet radiation.
  • EPDM benefit is not to pollute the runoff rainwater.
  • Sealer EPDM has minimal temperature deformation and retains basic performance in the temperature range of −40°C ... +90°C. Even if the gasket freezes or overheats, its elasticity and flexibility will remain in its original form as opposed to conventional rubber.

The EPDM gasket is firmly anchored to the steel washer by vulcanizing. The steel part of the washer has an annular shape and is slightly concave, which allows the fastener to adhere securely to the base surface and not to spoil the substrate.

Such washers are designed to strengthen and seal the fixing unit. Bonded washers are the cost-effective solution for roofing screw connection. The most common area of application - the attachment of roll and sheet materials for external, such as roofing, work.


EPDM bonded washer exterior view

EPDM Bonded Sealing Washer
14-10# steel


EPDM Bonded Washer
16-12# steel


EPDM Washer
16-14# steel




Washer with conductive EPDM gasket for roofing self-tapping screws

EPDM Bonded Washer dimensions


NameMetal outer diameter A±0.2 mmMetal inner diameter B±0.25 mmEPDM inner diameter C mmMetal thickness Tm±0.1 mmEPDM thickness Tr±0.2 mm
14-10# steel145.43.65-4.200.82.5
16-12# steel166.14.30-4.800.82.5
16-14# steel1675.10-5.600.82.5


EPDM Hardness 75±5 degrees

Gasket material - conductive ethylene propylene diene monomer rubber EPDM




Non-conductive EPDM Bonded Sealing Washer

EPDM Washer dimensions


NameMetal outer diameter A±0.2 mmMetal inner diameter B±0.25 mmEPDM inner diameter C mmMetal thickness Tm±0.1 mmEPDM thickness Tr±0.2 mm
14-10# steel145.43.65-4.200.82.5
16-12# steel166.14.30-4.800.82.5
16-14# steel1675.10-5.600.82.5

EPDM Hardness 75±5 degrees


EPDM bonded sealing washer installation

EPDM bonded washer installation with insufficient tightening
INSUFFICIENT TIGHTENING

Likely to cause leakage under seal and around fastener.


EPDM bonded washer correct installation
CORRECT INSTALLATION

Tight against surface, Seal flows inward to seal minor fastener diameter and surface.


EPDM bonded washer installation with excessive torque
EXCESSIVE TORQUE

Causes reverse dishing. Leakage under the seal is possible.




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