RENIA – Hardener C – Polyisocyanate Hardener & Crosslinking Agent
Renia Hardener C is an advanced polyisocyanate crosslinking agent developed in Germany by Renia GmbH. It is engineered to transform single-component contact adhesives into high-performance 2-component bonding systems.
By creating dense molecular crosslinks within the adhesive matrix, Härter C significantly enhances bond strength, elevates thermal stability beyond +120°C, and provides unmatched resistance against plasticizer migration, oil, fuel, grease, and moisture.
Key Highlights & Advantages:
- Extreme Heat Resistance: Elevates the thermal limits of contact adhesives, preventing bond failure on sun-exposed automotive dashboards, headliners, and boat decks.
- Blocks Plasticizer Migration: Essential for bonding oily leathers, rubber, and plasticized PVC (vinyl) — prevents the adhesive from softening, liquefying, or peeling over time.
- Universal Compatibility: Fully compatible with all Renia solvent-based adhesives (Colle de Cologne, Multi-Colle, Syntic-TOTAL, Top-Fit, and ReGuMet).
- Chemical & Moisture Immunity: Imparts superior resistance to fuel, engine oil, water, perspiration, and harsh weather exposure.
- Amber Glass Protection: Packed in a light-blocking glass bottle with an airtight seal to preserve polyisocyanate reactivity.
Recommended Uses & Applications:
- Automotive & Marine Trimming: High-heat bonding of leather or vinyl wraps on dashboards, door cards, marine upholstery, engine bay sound insulation, and campervan conversions.
- PVC & Vinyl Assembly: Critical additive for PVC-to-PVC bonding and adhering soft marine-grade PVC vinyls without adhesive degradation.
- Footwear & Orthopaedics: Heavy-duty sole bonding on natural rubber, oily pull-up leathers, and safety workboots subjected to heat and chemicals.
- General Workshop: Any high-stress application requiring permanent bond integrity under extreme mechanical and environmental conditions.
Mixing Ratio & Application Guide:
1. Dosage: Add 5% to 10% of Renia Hardener C into the contact adhesive (e.g. 50 ml to 100 ml of hardener per 1 Litre of glue).
2. Mixing: Stir the mixture thoroughly for at least 30–60 seconds to ensure homogeneous crosslinker distribution.
3. Pot Life / Working Window:
• Once mixed, the 2-component adhesive remains usable for 4 to 6 hours.
• Note: Adding hardener reduces the open time of the adhesive by approximately 30–40%.
4. Application: Apply, dry, and press the mixed adhesive following the standard instructions of the base cement.
5. Curing: Initial green strength allows immediate processing. Full chemical crosslinking and maximum thermal resistance are achieved within 24 to 48 hours.
Technical Data:
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- Function: Polyisocyanate Hardener & Crosslinking Agent (Vernetzer)
- Mixing Ratio: 5% – 10% by volume / weight
- Pot Life after Mixing: 4 – 6 hours
- Compatibility: Renia Colle de Cologne, Multi-Colle, Syntic-TOTAL, Top-Fit, ReGuMet, Vulkafest
- Packaging: 100 ml Amber Glass Bottle
- Shelf Life: Minimum 12 months stored in tightly closed original bottle at 10–25°C (Keep dry and protect from moisture)
PRECAUTIONS & SAFETY:
FOR PROFESSIONAL USE ONLY. Flammable liquid and vapour. Use only in well-ventilated areas or under forced extraction. Keep away from heat, hot surfaces, sparks, open flames, and ignition sources. Avoid inhalation of vapours and contact with skin/eyes. Consult Safety Data Sheet (SDS) at ……. before use.
FOR PROFESSIONAL USE ONLY. Flammable liquid and vapour. Use only in well-ventilated areas or under forced extraction. Keep away from heat, hot surfaces, sparks, open flames, and ignition sources. Avoid inhalation of vapours and contact with skin/eyes. Consult Safety Data Sheet (SDS) at ……. before use.







