Key Features
- No peroxide by-products — odor-free parts, no post-cure baking
- No white spots, no bubbles in the cured profile
- High clarity and anti-yellowing performance
- Non-sticky to steel belts — formulated for continuous extrusion lines
- 4-hour pot life at room temperature after A/B incorporation
- Non-toxic, low-odor — suited to medical and food-contact extrusions
220–350 °Ccure window
4 hpot life
A 1 kg / B 5 kgpackaging
Product Photo — G50A / G25B
Recommended Dosage
Dosage by compound type and hardness — confirm against the TDS for your application.
| Compound / Hardness | Part A (G50A) | Part B (G25B) | Notes |
|---|---|---|---|
| Fumed silica gum, 60–80 Shore A | 0.25–0.3% | 0.8–1% | — |
| Precipitated silica gum | 0.3–0.5% | 0.5–0.8% | — |
| Fumed silica gum, 30–50 Shore A | 0.35–0.5% | 0.5–0.8% | Add Part B first, let stand 3–24 h, then add Part A for best results |
Dosage is calculated on total compound weight. Dark-colored compounds may require a higher Part A dosage — contact us for guidance. Standard packs are Part A 1 kg + Part B 5 kg; one set treats several hundred kilograms of compound — tell us your formulation and target volume and we will confirm the exact quantities for your trial.
Processing
Mix the base compound
Compound raw gum and silica until the surface is smooth and uniform.
Add Part B first (G25B)
Mix until homogeneous. Do not reverse the addition order — adding Part A first can cause scorch.
Then add Part A (G50A)
Mix until homogeneous, then sheet out 2–3 times before feeding the extruder.
Extrude and cure
Hot-air tunnel at 220–350 °C — adjust temperature to your oven length and line speed.
⚠ Catalyst poisoning — read before use
Platinum catalysts are deactivated by sulfur, amines, phosphorus and tin compounds. Do not share equipment, lines or storage with peroxide-cure compounds or raw rubber. Do not add the agent while mixer temperature exceeds 45 °C. See the Technical Guide for the full list.
Specifications
| Product | Platinum Vulcanizing Agent, Extrusion Grade |
| Models | G50A (Part A) / G25B (Part B) |
| System | Two-part addition cure (Si–H / Pt) |
| Appearance | See TDS |
| Platinum content (Part A) | See TDS |
| Pot life after incorporation | 4 hours at room temperature |
| Cure conditions | 220–350 °C hot-air tunnel |
| Packaging | Part A: 1 kg · Part B: 5 kg |
| Shelf life | See TDS / product label |
Complete physical data
Viscosity, density, platinum content (PPM) and typical cure curves are listed in the TDS. Contact us for the current English TDS and MSDS.
Handling & Storage
- Store sealed in a cool place, away from peroxides, raw rubber, sulfur-, amine- or tin-containing materials
- Keep mixer temperature below 45 °C when adding the agent
- Process incorporated compound within 4 hours
- Works with both fumed and precipitated HTV silicone gums
Trial G50A / G25B on Your Line
Free sample with a dosage recommendation matched to your compound and hardness. Most customers see the difference in the first extrusion run.
Request a Free Sample