| Nordel | Vamac | Viton | Hytrel | Hytrel | Hytrel | Hytrel | Neoprene | Mechanical Properties | Hardness Range
(Durometer A & D) | 40-90 A | 40-95 A | 55-95 A | 40D | 55D*** | 63D | 72D | 40-95A | Tensile Strength, Mpa
(Pure Gum) | - | - | Over 12 | 25 | 44 | 40 | 40 | Over 20 | | Black Loaded Stocks | Over 20 | Over 17 | Over 13 | - | - | - | - | Over 20 | Specific Gravity
(Base Material) | 0,86 | 1,08-1,12 | 1,85 | 1,17 | 1,20 | 1,22 | 1,25 | 1,23 | | Vulcanising Characteristics | Excellent | Good | Good/Excel. | Unnecessary to vulcanize | Unnecessary to vulcanize | Unnecessary to vulcanize | Unnecessary to vulcanize | Excellent | | Adhesion To Metals | Good/Excel. | Good | Good/Excel. | Good | Good | Good | Good | Excellent | | Adhesion To Fabrics | Good | Good | Good/Excel. | Good | Good | Good | Good | Excellent | | Tear Resistance | Good | Good | Fair/Good | Excellent | Outstanding | Outstanding | Outstanding | Good | | Abrasion Resistance | Excellent | Good | Good | Outstanding | Outstanding | Outstanding | Outstanding | Excellent | | Compression Set | Good | Good | Good/Excel. | Fair | Fair | Poor | Poor | Fair/Good | | Rebound: | | | | | | | | | | Cold | Very Good | Poor | Good | Very Good | Good | Fair | Fair | Very Good | | Hot | Very Good | Fair | Excellent | Excellent | Very Good | Good | Good | Very Good | Electrical Properties | | Dielectric Strength | Excellent | Good | Good | Fair/Good | Fair/Good | Fair/Good | Good | Good | | Electrical Insulation | Excellent | Fair/Good | Very Low | Fair/Good | Fair/Good | Fair/Good | Good | Fair/Good | Fluid Resistance Properties | | Permeability To Gases | Fair | Very Low | Very Low | Low | Low | Low | Low | Low | | Acid Resistance: | | | | | | | | | | Dilute | Excellent | Good | Excellent | Good | Good | Good | Good | Excellent | | Concentrated | Excellent | Poor | Excellent | Poor | Poor | Poor | Poor | Good | | Solvent Resistance: | | | | | | | | | | Aliphatic Hydrocarbons | Poor | Good | Excellent | Excellent | Excellent | Excellent | Excellent | Good | | Aromatic Hydrocarbons | Poor | Fair | Excellent | Good | Good | Good | Good | Fair | Oxygenated
(Ketones, Etc.) | Good | Poor | Poor | Fair | Good | Good | Good | Poor | | Lacquer Solvents | Poor | Poor | Poor | Fair | Fair/Good | Good | Good | Poor | | Resistance To: | | | | | | | | | | Swelling In Lubricating Oil | Poor | Good | Excellent | Good | Excellent | Excellent | Excellent | Good | | Oil And Petrol | Poor | Poor | Excellent | Very Good | Excellent | Excellent | Excellent | Good | | Animal And Vegetable Oils | Good | Good | Excellent | Very Good | Excellent | Excellent | Excellent | Good | | Water Absorption and/or Hydrolytic Stability | Very Good | Very Good
(Up To 100° C) | Very Good | Very Good up to 100°C | Very Good up to 100°C | Very Good up to 100°C | Very Good up to 100°C | Good | Resistance To Environmental Factors | | Oxidation | Excellent | Excellent | Outstanding | Excellent | Excellent | Excellent | Excellent | Excellent | | Ozone | Outstanding | Outstanding | Outstanding | Excellent | Excellent | Excellent | Excellent | Excellent | | Sunlight Ageing | Outstanding | Outstanding | Outstanding | Very Good** | Very Good** | Very Good** | Very Good** | Very Good | Heat Ageing
(Upper Limit Cont. Service) | 145°C | 170°C | 205°C | 100°C | 110°C | 110°C | 110°C | 95°C | | Flame* | Poor | Poor | Excellent | Good**
(will melt) | Good**
(will melt) | Good**
(will melt) | Good**
(will melt) | Very Good | | Heat | Excellent | Excellent | Outstanding | Excellent | Excellent | Excellent | Excellent | Very Good | | Cold | Excellent | Good | Fair/Good | Excellent | Excellent | Excellent | Excellent | Very Good |
* These evaluations are qualitative and comparative only. They should not be construed as recommendations. Specific compounding is required to optimise performance. Elastomer choice should be based upon a practical consideration of the potential fire hazards involved in each individual case and, if applicable, the results of appropriate flame tests. ** With additives. *** The Dri-Seal Jiffi-Plug is generally produced from grade 47D Hytrel. 55D is the nearest available grade to 47D for the purposes of this guide. The information supplied herein is for guidance only and no liability will be accepted for the accuracy of such. |
