Addition-crosslinking silicones combine with the crosslinker without a cleavage product being produced. These silicones can thus also be processed in closed moulds. The curing time can be shortened by increasing the temperature. These systems, however, are relatively sensitive to inhibition of the crosslinking, also called poisoning. The products made from addition-crosslinking silicones are generally non-toxic. Altropol has marked these systems with an even initial number, the crosslinkers with the letter A.

  • The vulcanization is temperature-dependent for all systems and accelerated considerably by heating.
  • Liquid silicone ingredients can be removed by means of our NEUKASIL silicone and wax remover.

Shore A - 0 to 20 points

Shore AProductProperties / field of applicationCrosslinker typeCrosslinker addition %Colour of caoutchoucMixed viscosity at RT mPasPot life in minDemoulding
in hours
Data Sheet
6NEUKASIL
RTV 23
standard system, low viscosity, low shore hardness, high elongationA 7 colorless40translucent3,50015024Bild-Merkblatt
6NEUKASIL
SN 2972
high resistance to initial tearing and tear propagation, very good flowability, can be made thixotropicSN 2972 comp. B100translucent2,2502024Bild-Merkblatt
7NEUKASIL
RTV 26
low hardness, very good flowability, good resistance to initial tearing and tear propagation

production of products for orthopaedics, suitable for polyester, epoxides, wax, casting of electrical component parts, production of parts, prototypes
A 7 blue40blue7,00020024Bild-Merkblatt
11NEUKASIL
SN 2978
high resistance to initial tearing and tear propagation, very good flowability, can be made thixotropicSN 2978 comp. B100translucent2,0002516Bild-Merkblatt
12NEUKASIL
RTV 23
standard system, very low viscosity, low shore hardness, high elongationA 14 colorless30translucent8,50012024Bild-Merkblatt
15NEUKASIL
RTV 26
variable hardness, very good flow properties, high resistance to initial tearing and tear propagation

production of elastic moulds, suitable for polyester / gypsum / wax, casting of electrical components, production of orthopaedics, coating of tissues
A 14 colorless30white15,00012024Bild-Merkblatt
19NEUKASIL
SN 2953 mod 2
high resistance to initial tearing and tear propagation, very good flowability, can be made thixotropicSN 2953 mod. 2 comp. B100translucent2,500113Bild-Merkblatt
  • The vulcanization is temperature-dependent for all systems and accelerated considerably by heating.
  • Liquid silicone ingredients can be removed by means of our NEUKASIL silicone and wax remover.

Shore A - 20 to 40 points

Shore AProductProperties / field of applicationCrosslinker typeCrosslinker addition %Colour of caoutchoucMixed viscosity at RT mPasPot life in minDemoulding
in hours
Data Sheet
20NEUKASIL
RTV 23
variable hardness, very good flowability, high resistance to initial tearing and tear propagation, variable pot lives

production of elastic moulds, suitable for e.g. plaster / wax, casting of electric component parts, product for orthopaedics, coating of tissues
A 3 colorless6.5translucent30,0006024Bild-Merkblatt
21NEUKASIL
SN 2962
high resistance to initial tearing and tear propagation, very good flowability, can be made thixotropic, fast curingSN 2962 comp. B100white or green5,000152Bild-Merkblatt
21NEUKASIL
SN 2888
good resistance to initial tearing and tear propagatoin, very good flowability, can be made thixotropic, quick through-curing

general mould making, body cast
SN 2888 comp. B100translucent2,90050.5Bild-Merkblatt
22
22
NEUKASIL
RTV 22
high resistance to initial tearing and tear propagation, very good flowability, can be made thixotropic, quick through-curing

general mould making, body cast
A 142 orange
A 156 orange
A 162 orange
100
100
100
orange
orange
orange
2,700
2,700
2,700
5
30
60
0.5
12
18
Bild-Merkblatt
22NEUKASIL
RTV 22 F
high resistance to initial tearing and tear propagation, very good flowability, can be made thixotropic, quick through-curing

general mould making, body cast, production of moulds for chocolate, marzipan and similar
A 142 F orange100orange3,25050.5Bild-Merkblatt
25NEUKASIL
RTV 22 SP
high resistance to initial tearing and tear propagation, sprayable on vertical surfaces, can be made thixotropic, quick through-curingA 142 SP100orange11,50050.5Bild-Merkblatt
25NEUKASIL
RTV 23
variable hardness, very good flowability, high resistance to initial tearing and tear propagation, variable pot lives

production of elastic moulds, suitable for e.g. plaster / wax, casting of electric component parts, product for orthopaedics, coating of tissues
A 18 colorless or blue10translucent or blue25,0009024Bild-Merkblatt
28NEUKASIL
RTV 26
very good flowability, high resistance to initial tearing and tear propagation

production of elastic moulds, suitable for plaster, wax, polyester, casting of electrical component parts, products for orthopaedics, coating of fabrics, compliant with FDA 21 CFR 177.2600 and BfR-Recommendation XV „Silicones“
A 18 colorless or blue10colourless or blue25,0009024Bild-Merkblatt
28NEUKASIL
RTV 230
high resistance to initial tearing and tear propagation, very good flowability, can be made thixotropic, mixing ratio 1 : 1, quick through-curing

general mould making, lifecasting, production of moulds for chocolate, marzipan
and similar, compliant with FDA 21 CFR 177.2600 and BfR-Recommendation XV „Silicones“
A 149 reddish brown/
colorless/orange
100reddish brown/
colorless/orange
5,0004024Bild-Merkblatt
30NEUKASIL
RTV 29
shore 00 hardness, production of pads for padprinting, very low viscosityA 99 reddish brown5reddish brown3,00018024Bild-Merkblatt
37
37
NEUKASIL
SN 2954
high resistance to initial tearing and tear propagation, very good flowability, can be made thixotropicSN 2954 comp. B
SN 2954 comp. B 1
100
100
translucent/redbrown
translucent
6,200
6,200
25
50
3
12
Bild-Merkblatt
37
37
ProtoSil
RTV 260 NEW
very good flow properties, shrinkage-free vulcanization at room temperature, can be made thixotropic, high resistance to initial tearing and tear propagation, very high transparence

production of elastic moulds, particularly for prototypes, excellent resistance to vacuum casting resins
RTV 260 NEW comp. B1 (dry)
RTV 260 NEW comp. B2 (oily)
100
100
colorless
colorless
15,000
23,000
60
60
16
16
Bild-Merkblatt
40NEUKASIL
RTV 230-7 AS
production of antistatic prefabricated products, addition-crosslinkingB (platinum component)10grey10,0003024Bild-Merkblatt
40
39
ProtoSil
RTV 245 NEW
Shore hardness A 40, very good flow properties, shrinkage-free vulcanization at room temperature, can be made thixotropic, high resistance to initial tearing and tear propagation, very high transparency

production of elastic moulds, particulary for prototypes, excellent resistance to vacuum casting resins
RTV 245 NEW comp. B1 (dry)
RTV 245 NEW comp. B2 (oily)
10
10
colorless
colorless
35,000
50,000
60
60
24
24
Bild-Merkblatt

Shore A > 40 points

Shore AProductProperties / field of applicationCrosslinker typeCrosslinker addition %Colour of caoutchoucMixed viscosity at RT mPasPot life at RT minDemoulding in hoursData Sheet
45
45
NEUKASIL
RTV 27
low-viscous, mean Shore hardness, variable pot life

general mould making, coating of fabrics, embedding material and material for electrical insulation
A 43 transparent
A 108 transparent
10
10
transparent
transparent
4,500
4,500
60
240
24
24
Bild-Merkblatt
45NEUKASIL
RTV 20
very good flowability, high Shore A-hardness

general mould making, coating of woven fabrics, embedding and electrical insulation
A 101 colorless / blue20white / grey35,00013024Bild-Merkblatt
55NEUKASIL
RTV 20
very good flowability, high resistance to initial tearing and tear propagation, higher Shore A hardness, variable pot life

mould making, suitable for polyester, epoxies, wax, casting of electrical component parts, production of parts, prototypes, compliant with FDA 21 CFR 117.2600 and BfR-Recommendation XV „Silicones“
A 26 colorless / blue10colorless / blue80,00012024Bild-Merkblatt
55
55
55
NEUKASIL
RTV 20
very good flowability, high resistance to initial tearing and tear propagation, higher Shore A hardness, variable pot life

mould making, suitable for polyester, epoxies, wax, casting of electrical component parts, production of parts, prototypes, compliant with FDA 21 CFR 177.2600 and BfR-Recommendation XV „Silicones“
A 2 slow colorless / blue
A 2 rapid colorless / blue
retarder SN 2994 colorless
(test in conjunction with crosslinker A 2 rapid)
10
10
4
blue / colorless
blue / colorless
white
80,000
80,000
80,000
90
15
90
24
12
24
Bild-Merkblatt
58NEUKASIL
RTV 25
very good flowability, high Shore A-hardness, medium-viscous

general mould making, production of orthopaedic products, coating of woven fabrics, material for embedding and electrical insulation, compliant with FDA 21 CFR 177.2600 and BfR-Recommendation XV „Silicones“
A 1 slow colorless / blue
A 1 rapid colorless / blue
10
10
white / blue
white / blue
9,000
9,000
120
20
24
16
Bild-Merkblatt