Chemical resistance FEP

Although FEP is similar to PTFE, there are a number of important differences. It has a slightly higher coefficient of friction, lower continuous working temperature and is more transparent than PTFE. FEP has a better gas and vapor permeability and outstanding UV transmission values.

Note: The chemical resistance of each polymer is mainly determined by the chemical structure of the material and the strength of the weakest link in this specific structure.

Chart codes

R - Resistant
LR - Limited Resistance
NR - Not Recommended
ND - No Data

Actual properties may change due to processing method, compound type, extruded dimensions and other variables. It is the user's responsibility to evaluate and fully test the suitability of the product for their specific application.

Chemical Resistance
  20°C/68°F 60°C/140°F 100°C/212°F
Acetaldehyde R R R
Acetic acid (10%) R R R
Acetic acid (glac./anh.) R R R
Acetic anhydride R R R
Aceto-acetic ester R R R
Acetone R R R
Other ketones R R R
Acetonitrile R R R
Acetylene R R R
Acetyl salicylic acid R R R
Acid fumes R R R
Alcohols R R R
Aliphatic esters R R R
Alkyl chlorides ND ND ND
Alum R R R
Aluminium chloride R R R
Aluminium sulphate R R R
Ammonia, anhydrous R R R
Ammonia, aqueous R R R
Ammonium chloride R R R
Amyl acetate R R R
Aniline R R R
Antimony trichloride ND ND ND
Aqua regia R R R
Aromatic solvents R R R
Ascorbic acid R R R
Beer R R R
Benzaldehyde R R R
Benzene R R R
Benzoic acid R R R
Benzoyl peroxide R R R
Boric acid R R R
Brines, saturated R R R
Bromide (K) solution R R R
Bromine R R R
Bromine liquid, tech. R R R
Bromine water, saturated aqueous R R R
Butyl acetate R R R
Calcium chloride R R R
Carbon disulphide R R R
Carbonic acid R R R
Carbon tetrachloride R R R
Caustic soda & potash R R R
Cellulose paint R R R
Chlorates of Na, K, Ba R R R
Chlorine, dry R R R
Chlorine, wet R R R
Chlorides of Na, K, Ba R R R
Chloroacetic acid R R R
Chlorobenzene R R R
Chloroform R R R
Chlorosulphonic acid R R R
Chromic acid (80%) R R R
Citric acid R R R
Copper salts (most) R R R
Cresylic acids (50%) R R R
Cyclohexane R R R
Detergents, synthetic R R R
Emulsifiers, concentrated R R R
Ether R R R
Fatty acids (>C6) R R R
Ferric chloride R R R
Ferrous sulphate R R R
Fluorinated refrigerants R R R
Fluorine, dry R R NR
Flourine, wet ND ND ND
Fluorosilic acid ND ND ND
Formaldehyde (40%) R R R
Formic acid R R R
Fruit juices R R R
Gelatine R R R
Glycerine R R R
Glycols R R R
Glycol, ethylene R R R
Glycolic acid R R R
Hexamethylene diamine R R R
Hexamine R R R
Hydrazine R R R
Hydrobromic acid (50%) R R R
Hydrochloric acid (10%) R R R
Hydrochloric acid (conc.) R R R
Hydrocyanic acid R R R
Hydrofluoric acid (40%) R R R
Hydrofluoric acid (75%) R R R
Hydrogen peroxide (30%) R R R
Hydrogen peroxide (30 - 90%) R R R
Hydrogen sulphide R R R
Hypochlorites R R R
Hypochlorites (Na 12-14%) R R R
Iso-butyl-acetate R R R
Lactic acid (90%) R R R
Lead acetate R R R
Lead perchlorate ND ND ND
Lime (CaO) R R R
Maleic acid R R R
Manganate, potassium (K) R R R
Meat juices R R R
Mercuric chloride R R R
Mercury R R R
Methanol R R R
Methylene chloride R R R
Milk products R R R
Moist air R R R
Molasses R R R
Monoethanolamine R R NR
Naptha R R R
Napthalene R R R
Nickel salts R R R
Nitrates of Na, K and NH3 R R R
Nitric acid (<25%) R R R
Nitric acid (50%) R R R
Nitric acid (90%) R R R
Nitric acid (fuming) R R R
Nitrite (Na) R R R
Nitrobenzene R R R
Oils, diesel R R R
Oils, essential R R R
Oils, lubricating + aromatic additives R R R
Oils, mineral R R R
Oils, vegetable and animal R R R
Oxalic acid R R R
Ozone R R R
Paraffin wax R R R
Perchloric acid R R R
Petroleum spirits R R ND
Phenol R R R
Phosphoric acid (20%) R R R
Phosphoric acid (50%) R R R
Phosphoric acid (95%) R R R
Phosphorous chlorides R R R
Phosphorous pentoxide ND ND ND
Phthalic acid R R R
Picric acid R R R
Pyridine R R R
Salicyl aldehyde R R R
Sea water R R R
Silicic acid R R R
Silicone fluids R R R
Silver nitrate R R R
Sodium carbonate R R R
Sodium peroxide R R R
Sodium silicate R R R
Sodium sulphide R R R
Stannic chloride R R R
Starch R R R
Sugar, syrups & jams R R R
Sulphamic acid ND ND ND
Sulphates (Na, K, Mg, Ca) R R R
Sulphites R R R
Sulphonic acids R R R
Sulphur R R R
Sulphur dioxide, dry R R R
Sulphur dioxide, wet R R R
Sulphur dioxide (96%) R R R
Sulphur trioxide R R R
Sulphuric acid (<50%) R R R
Sulphuric acid (70%) R R R
Sulphuric acid (95%) R R R
Sulphuric acid, fuming R R R
Sulphur chlorides R R R
Tallow R R R
Tannic acid (10%) R R R
Tartaric acid R R R
Trichlorethylene R R R
Urea (30%) R R R
Vinegar R R R
Water, distilled. R R R
Water, soft R R R
Water, hard R R R
Wetting agents (<5%) R R R
Yeast R R R
Zinc chloride R R R


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