O-Ring Material Reference Guide (Fonte: Marco Rubber)
| Material | Recomended Use | Not Recomended For | Mechanical Properties |
| Buna-N (Nitrile)
Standard: 70 Durometer Black |
Silicone Greases / Oils Water Petroleum Oils / Fuels Ethylene Glycol Fluids |
Keytones (MEK) Halogenated Hydrocarbons Auto / Aircraft Brake Fluids Strong Acids Sunlight, Ozone, Weathering |
Good Wear Resistance Good Compression Set Resistance Good Short-Term Resilience Good Permeation Resistance |
| Viton® (Fluorocarbon Type A)
Standard: 75 Durometer Black |
Vacuum Most Acids / Chemicals Halogenated Hydrocarbons Di-Ester Lubricants Petroleum Oils / Fuels Silicone Oils / Greases |
Keytones (MEK) Auto / Aircraft Brake Fluids Amines (Ammonia) Acetone, Skydrol, Ethyl Accetate Hot Water and Steam Low Molecular Esters and Ethers |
Good Wear Resistance Excellent Comp. Set Resistance Moderate Short-Term Resilience Excellent Permeation Resistance |
| Silicone
Standard: 70 Durometer Orange |
Dry Heat Wide Temperature Range Sunlight, Ozone, Weathering Odorless and Non-Toxic |
Keytones (MEK) Acids Silicone Oils Brake Fluids |
Poor Wear Resistance Excellent Comp. Set Resistance Poor Short-Term Resilience Excellent Permeation Resistance |
| EPDM (Ethylene Propylene)
Standard: 70 Durometer Black |
Sunlight, Ozone, Weathering Hot Water and Steam Auto / Aircraft Brake Fluids Some Acids ans Bases Keytones ans Alcohols Plumbing |
Petroleum Oils Fuels |
Good Wear Resistance Good Comp. Set Resistance Moderate Short-Term Resilience Good Permeation Resistance |
| Material | Recomended Use | Not Recomended For | Mechanical Properties |
| Chemraz® / Kalrez® / Simriz® (Perfluoroelastomer)Various Compounds Designed for Specific Applications Temperature Range: -10ºF to 615ºF |
High Temperature Resistance Excellent Chemical Resistance Low Out Gassing Chlorine Wet/Dry Petroleum Oil Chlorinated Hydrocarbons |
Molten metals Gaseous Alkali Metals Halogenated Freons/Fluids Uranium Hexafluoride |
Good Wear Resistance Good Comp. Set Resistance Moderate Short-Term Resilience Good Permeation Resistance |
| Neoprene® (Chloroprene)
Standard: 70 Durometer Black |
Refrigerants (Freon) Ammonia Some Petrolium Oils Dilute Acids Silicone ester Lubricants |
Keytones (MEK) Gasoline Auto / Aircraft Brake Fluids |
Good Wear Resistance Moderate Comp. Set Resistance Moderate Short-Term Resilience Good Permeation Resistance |
| Urethane
Standard: 90 Durometer Translucent |
Drive Belts Some Petroleum Oils Some Hydrocarbon Fuels Oxygen / Ozone |
Keytones (MEK) Acids Auto / Aircraft Brake Fluids Chlorinated Hydrocarbons Water |
Excelent Wear Resistance Poor Comp. Set Resistance Excelent Short-Term Resilience |
| Fluorosilicone
Standard: 70 Durometer Blue |
Jet Fuel Dry Heat Wide Temperature Range Some Petroleum Oils Clorinated Solvents |
Keytones (MEK) Phosphate Esters Some Acids Auto / Aircraft Brake Fluids Amines (Ammonia) |
Poor Wear Resistance ModerateComp. Set Resistance Moderate Short-Term Resilience Poor Permeation Resistance |
| Teflon Encapsulated
O-Ring Covered with Teflon Tube |
Depends on O-Ring Core Chemical Resistance Heat Resistance |
Depends on O-Ring Core | Good Wear Resistance Good Short-Term Resilience Good Permeation Resistance |
| Teflon®
Standard: Non-Elastic White |
Chemical Resistance Fuel Resistance Low Coefficient of Friction |
Non-Elastic | Good Wear Resistance Low Coefficient of Friction |
Clecio Mayrink
Engenheiro de sistemas nascido no Rio de Janeiro, ingressou no mergulho em apneia em 1983 e autônomo em 1986 pela CMAS, participando da primeira turma da PADI no Rio de Janeiro em 1990. É mergulhador Técnico Trimix, Technical Cave Diver, Advanced Cave Sidemount / No Mount, possuindo mais de 40 anos de experiência em mergulho, imagens subaquáticas e pesquisador de naufrágios, sendo uma referência no país.
Ex-juiz da AIDA International, foi membro da expedição de mapeamento da caverna na Lagoa Misteriosa em Bonito-MS no ano de 2008, é o idealizador do Brasil Mergulho criado em 1998 (MTB 0081769-SP) e um dos responsáveis pelo tema Mergulho no 1° Atlas dos Esportes do Ministério dos Esportes no país.
Também atuou na produção de matérias e documentários no Brasil e no exterior, prestando consultoria para mídia em geral, órgãos públicos, entidades militares e internacionais, como a ONU e UNESCO.
