Silicone Rubber Forms: HTV, LSR, RTV-1, RTV-2 and Sealants
Choosing the right silicone rubber form depends on manufacturing method, cure environment, dimensional requirements, and production volume.
| Spec | ZEMSIL SB-HTV | ZEMSIL SB-LSR | ZEMSIL SB-RTV2 | ZEMSIL SB-RTV1 | ZEMSIL SS-AC | ZEMSIL SS-NK | ZEMSIL SS-WS |
|---|---|---|---|---|---|---|---|
| Form | HTV solid rubber | LSR (liquid) | 2-component RTV | 1-component RTV | 1K acetoxy sealant | 1K neutral sealant | Water-based sealant |
| Processing | Compression / extrusion | Injection moulding | Mix & pour / encapsulate | Gun/tube, on-site | Gun/tube | Gun/tube | Gun/tube, brush |
| Cure mechanism | Peroxide or Pt addition | Pt addition (heat) | Condensation (Sn cat.) | Moisture / acetoxy | Moisture / acetic acid | Moisture / neutral | Water evaporation |
| Shore A (typical) | 40–80 | 20–60 | 15–60 (adjustable) | ~30 | ~25 | ~20–40 | — |
| Best for | Seals, gaskets, tubing | Precision moulded parts, medical | Potting, encapsulation, moulds | Construction, glazing, general | Glass/aluminium glazing | Electronics, metal bonding | Porous substrates, masonry |
How to choose
- ▸High-volume compression-moulded seals or extruded profiles: SB-HTV.
- ▸Precision injection-moulded parts (medical, keyboards, baby products): SB-LSR.
- ▸Potting, encapsulation, or flexible moulds — small-batch or production: SB-RTV2.
- ▸On-site construction sealing, curtain walls, or DIY repairs: SB-RTV1 (acetoxy).
- ▸Sensitive metals or electronics where acetic acid is harmful: SS-NK (neutral cure).
- ▸Porous concrete, stone, or masonry: SS-WS (water-based, no solvent).
Products compared
ZEMSIL SB-HTV
HTV Silicone Rubber Compound
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ZEMSIL SB-LSR
Liquid Silicone Rubber (Addition Cure)
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ZEMSIL SB-RTV2
Two-Component RTV Silicone Rubber
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ZEMSIL SB-RTV1
Single-Component RTV Silicone Rubber (Acetoxy Cure)
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ZEMSIL SS-AC
Acetoxy Cure Silicone Sealant
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ZEMSIL SS-NK
Neutral Cure Silicone Sealant
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ZEMSIL SS-WS
Water-Based Silicone Emulsion Sealant
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