Material Overview

Besaflex

Besaflex sealing bands of elastic PVC are characterised by many excellent properties, providing savings over a structure's lifetime. Flexible, soft PVC has been in use since the 1930s, and its properties are subject to constant research.
Besaflex sealing bands conform to all standard requirements, thanks to which they are broadly used in the construction industry.
They are resistant to acidic and alkali solutions, rotting and all other natural factors.
The broad selection of Besaflex products guarantees water-tightness of day joints and expansion divisions without interference in structural components (rebar).


Nitriflex

The material, from which Nitriflex bands are made of, is manufactured out of high-quality components, as corresponding to norm DIN 18541.
DIN 18541-compliant bands made of Nitriflex are characterised by maximum elongation at break, excellent resistance to chemicals and ageing as well as stable flexibility comparable to the flexibility of rubber.
The execution of diverse band joints is quick and cost-effective. Welding may be done using standard equipment, which is very simple thanks to the very good thermal conductivity of Nitriflex (for this purpose, one should not use heat welders with a power exceeding 300 W for band joining).
Nitriflex bands manufactured according to DIN 18541 may be shaped in various ways, thank to which they can be used for all kinds of structures, even to suit the most stringent requirements.


Elastoflex

Elastoflex seal bands are used of elastomer, or crossed multi-particle polymers with big openings (synthetic rubber), subjected to curing. Due to the crossing process being irreversible, special joining technologies must be used for their joining.
Elastoflex seal bands are perfect for use in structures with moving joints that are under threat of changing loads and low temperatures. Elastoflex insulation corresponds to norm DIN 7865.


Poliflex

Polyethylene bands were designed for sealing of pre-cast components.
This band type does not require the use of joining clamps, thus it can be used independently of the synthetic material insulation used earlier (i. e. mat, film, etc.) for executing joints in concrete structures.
Modified polyethylene bands are characterised by good weldability, resistance to aggressive chemicals and micro-organisms as well as high density. They do not lose their flexible properties in low temperatures.


Thermoplastic elastomer (TPE)

Joining and closing insulating bands made of TPE are characterised by greatest elongation at break, flexibility in low temperatures, as well as resistance to ageing and UV light.
Joining bands of this material is fast and cost-effective thanks to thermoplastic welding and using standard equipment (curing is not required).

 

BAND CHEMICAL PROPERTIES

Materials for use around potable water supplies

Besaflex sealing bands conform to all standard requirements, thanks to which they are broadly used
The company Besaplast manufactures also bands used in areas, where potable water appears. These are bands made of soft, coloured and flexible thermoplastic elastomer and polyethylene.
They are a fusion of good properties and workability, with additional adherence to Polish national and European provisions concerning synthetic materials and contact with potable water. They can be fully recycled.
Special characteristics:

  • non-hygroscopic,
  • mechanical properties in room temperature,
  • good behaviour also after long-term ageing in water,
  • natural colours,
  • compliance with EU directive no. 2003/11/EC.

Property
Unit Wymagania
Besaflex
Nitriflex
Besaflex
(R-PVC)
Besaflex
wg BS
Polietylen
(PE)
Polipropylen
(PP)
Elastoflex
Thermoplastic
elastomer (TPE)

Test method
according to

N
BV
N
BV
Shore hardness, type A 
hardness meter
˚Sh
75±5
67±5
-
80±10
90±5
62±5
62±5 62±5
PN-EN ISO
868:2005
Density
g/cm³
1,33±0,03 1,25±0,02
1,52±0,05
1,30±0,06
-
1,52±0,05
-
1,11±0,03
PN-EN ISO
1183-2006
Yield strength
MPa ≥ 8
≥ 10
≥ 10
≥ 13
≥ 10
≥ 65
≥ 10
≥ 19,1
PN-EN ISO
527-1:1998
(¹ PN-ISO
37:2007)
Elongation at break
%
≥ 275
≥ 350
≥ 65
≥ 285
≥ 350
≥ 65
≥ 380
≥ 250
PE-EN ISO
527-1:1998
(¹ PN-ISO
37:2007)
Shear strength
N/mm
≥ 12
≥ 12
-
-
≥ 12
-
≥ 20 ≥ 12
PN- ISO
34-1:2007

Resistance of materials to selected chemical compounds

Corrosive agent
Concentration  (%)
Temp. (˚C)
Material
Besaflex (soft PVC)
Nitriflex
Elastoflex
acetone any
20
-
+/-
+/-
acetone 100
20
+/-
+/-
not tested
ethyl alcohol 10
20
+

not tested
96
20
-
-
not tested
potassium-chromium alum (water solution) any
40
+
+
not tested
alums (various kinds) any
40
+
+
+
ammonia (water solution) 15
40
+
+
+
saturated 40
+
+
+
aniline 100
20
-
-
not tested
ink
30
+
+
+
silver nitrate 10
60
+
+
not tested
calcium nitrate
20
not tested not tested +
benzene 100
20
-
+/-
-
petrol 100
20
-
+
+/-
borax (sodium borate)

not tested not tested +
borax (solution) any
40
+
+
not tested
bromine (gaseous and liquid)
20
-
-
not tested
buna (latex)
20
+
+
not tested
butadiene 100
20
-
-
not tested
butanol 100
20
-
-
not tested
chlorine any 20
-
-
-
methylene chloride 100
20
-
not tested not tested
calcium chloride (water solution) any
60
-
+
+
ferric chloride any
60
+
+
+
chloromethyl 100
20
+
not tested not tested
acetylene chlorohydrines (solution)
20
-
-
not tested
acetylene tetrabromide 100
20
-
-
not tested
carbon tetrachloride 100
20
-
+
not tested
dextrin (water solution) saturated 60
+
+
not tested
potassium dichromate (water solution) saturated 20
+
+
not tested
carbon bisulphate 100
20
-
not tested
not tested
sulphur dioxide (gaseous) any
20
+/-
not tested not tested
ethyl ether 100
40
-
-
not tested
acetic ester
100
20
-
not tested not tested
phenol
20
not tested not tested +/-
phenol (water solution) any
20
-
+/-
not tested
formaldehyde (water solution) 30
20
+/-
+/-
not tested
formalin
20
not tested not tested
+
freon 12
100
20
+/-
+/-
not tested
glycerine

not tested not tested +
glycol

+
+
+
ethylene glycol 100 40
+/-
+
not tested
60
-
-
not tested
Corrosive agent Concentration(%)
Temp. (˚C)
Material
Besaflex (soft PVC)
Nitriflex
Elastoflex
glucose saturated 20
+
+
+
carbolineum 20
20
-
not tested not tested
fixing bath
40
+
+
not tested
xylene not tested

not tested not tested
-
nitric acid 3
20
+/-
+
+
60
+
not tested +/-
6
20
+
+
+
40
+
not tested +/-
15
20
+/-
+
+
65
20
+/-
not tested +/-
40
-
not tested -
boric acid any
60
+
+
not tested
hydrobromic acid any
40
+
+
not tested
hydrochloric acid any
60
+
+
+
chromic acid 0,2-10
20
+
+
not tested
citric acid not tested

not tested +/-
+/-
phospohric acid (water solution) any
60
+
+
+
tannic acid not tested

not tested not tested +
butyric acid (water solution) 20
20
+/-
+
not tested
concentrated 20
-


lactic acid
20
not tested not tested +/-
formic acid 10
20
not tested +
+
perchloric acid any
20
+/-
+
not tested
acetic acid (anhydrous) 100
20
-
not tested
not tested
acetic acid (glacial) 100
20
-
+/-
not tested
acetic acid (wine vinegar)
20
+/-
+
+/-
40
+/-
+
+/-
acetic acid (water solution) 6 20
+
+
+
40
+/-
+
+/-
60
+/-
+/-
+/-
sulphuric acid 10
20
+/-
+
+/-
60
40
+/-
+/-
not tested
oxalic acid

not tested not tested +/-
carbonic acid any
40
-
+
+
buttermilk
20
not tested +
+
methanol 100 20
-
not tested not tested
urine
20
+
+
not tested
urea any
60
+
+
not tested
soapy water saturated 20
+
+
+
potassium perchlorate (water solution) saturated 40
+
+
not tested
hydrogen perchloride do 30
20
+
+
not tested
bromonaphthalene 100
20
-
not tested not tested
fertiliser (liquid) b

+
+
+
nitroglycerin 100
20
-
not tested not tested
nitro varnish (fixed nitrocellulose varnish) fixed 20
-
not tested not tested
butyl acetate

100
20
-
-
not tested
Corrosive agent Concentration(%)
Temp. (˚C)
Material
Besaflex (soft PVC)
Nitriflex
Elastoflex
ethyl acetate 100
20
-
-
not tested
lead acetate (water solution)
20
+
+
not tested
oil, see: fats, diesel fuel, etc.
linseed oil not tested

not tested not tested +/-
fuel oil not tested

not tested +
+
diesel fuel, hydraulic oil 100
40
+/-
+
+/-
100
60
-

+/-
ricin oil

not tested not tested +
transformer oil 100
40
+/-
+/-
not tested

60
-
-
not tested
oleum 10
20
-
not tested
not tested
ozone
20
+/-
+/-
not tested
paraffin

not tested not tested +/-
phosphoric pentoxide 100
20
+
+
not tested
ramasite
20
+
+
not tested
copper sulphate (water solution) any
60
+
+
not tested
calcium sulphate (water solution)
20
not tested not tested +
hydrogen sulphide (gaseous) 100
20
-
not tested not tested
liquid lubricant, spindle oil, etc. 100
40
+/-
+/-
+/-
Stauffer lubricant 100
40
+/-
+ not tested
tar not tested

not tested + +
aluminium salts any
40
+
+ +
ammonia salts (water solution) any
60
+
+ +
zinc salts any
60
+
+ not tested
magnesium salts (water solution) any
60
+
+ not tested
fertiliser salts (water solution) any
60
+
+ not tested
nickel salts (water solution) any
60
+ + not tested
potassium salts any
60
+
+
+
sodium salts, see: sodium chloride
table salt (water solution) any
60
+
+
+
engine exhaust containing carbon dioxide any
60
+
+
+
engine exhaust containing hydrochloric acid any
60
+
+
+
syrup / fruit syrup not tested


+
+
liquid glass

+
+
+
sewage
20
+
+
+
oxygen any
60 +
+
+
fats (water suspension)
20
+/-
+
+/-
plant and animal-based fats 100
20
-
+
+/-
toluene 100
20
-
+/-
+
trichloroethylene 100
20
-
not tested not tested
hydrocarbons saturated 20
-
+
not tested
red and white wine

+
+
+
Pe-Ce fibres (fixed)
20
-
not tested not tested
hydrogen sulphite (water solution) any 40
+
+
not tested
60
+/-
+
not tested
Corrosive agent Concentration (%)
Temp. (˚C)
Material
Besaflex (soft PVC)
Nitriflex
Elastoflex
potassium hydroxide 6
40
+
+
+
15
20
+/-
+
+
30
20
+/-
+
+
concentrated 20
+/-
+/-
+
concentrated 40
-
+/-
+
sodium hydroxide (water solution)

20
not tested not tested
+/-
chlorine water
20
not tested +
+/-
rain water

+
+
+
Javel water (bleaching alkali compound) 15
20
+/- +
-
lake water

+
+
+
glacier water

+
+
+
soft water

+
+
+
sea water

+
+
+
CO2-infused water 100
20 -
+
+
river water

+
+
+
condensed water

+
+
+
salty water
40
not tested +
+
calcium-poor water

+
+
+
water with high gypsum content

+
+
+
ferrocyanide any 60
+
+
not tested
Corrosive agent
Conc. (%)
Temp. (˚C)
T-type fitted carpet (PVC, HDPE)
butyl alcohol 70
60
+
ethyl alcohol 70
60
+
ammonia concentrated 60
+

sodium chloride
concentrated 60
+
ferric chloride concentrated 60
+
dextrose concentrated 60
+
sodium dichromate concentrated 60
+
sulphur dioxide (sulphuric water) concentrated 60
+
glycerine -
60
+
ethylene glycol any
60
+
nitric acid 10
60
+
benzene sulphuric acid 40
60
+
benzoic acid any
60
+
boric acid concentrated 60
+
hydrochloric acid 37 / 10
60
+
chromic and phosphoric acid concentrated 60
+
fluoric acid 60 / 25
60
+
phosphoric acid 85 60
+
tannic acid concentrated 60
+
lactic acid 10
60
+
uric acid any
60
+
acetic acid 10
60
+
sulphuric acid 70 / 10
60
+
carbonic acid concentrated 60
+
methanol 70 60
+
hydrogen peroxide 20
60
+
nickel sulphate concentrated
60
+
sodium sulphate concentrated 60
+
hydrogen sulphide concentrated
60
+
sodium thiosulphate salts concentrated 60
+
sodium carbonate concentrated 60
+
chlorine water concentrated 60
+
magnesium hydroxide concentrated 60
+
potassium hydroxide 10 / 35
60
+
sodium hydroxide 10 / 35 60
+

+ = resistant
- = not resistant
+/-  partially resistant

If you were looking for selected particular chemical compounds in the material resistance table, but have not found the relevant results confirming the actions of a particular corrosive agent, please contact the Technical Department of sales representatives. Betomax Polska may, at the customer's request, conduct chemical resistance tests for bands from which sealing bands are made.