Full definition
A chemical bonding process that achieves rubber-to-rubber or rubber-to-substrate bonds at ambient temperature (no heated press required) using two-component adhesive systems containing reactive chemicals that cross-link at room temperature, creating a vulcanized (cross-linked) bond layer. The term "cold vulcanization" distinguishes this from hot vulcanization (which requires 145-180°C and a press). Process: (1) prepare surfaces — clean, buff to remove oxidized rubber and expose fresh reactive surface; (2) apply conditioner to remove debris; (3) apply primer if specified; (4) mix two-component cement (base + hardener) and apply in 2-3 thin coats, drying between each; (5) apply repair rubber or splice material while cement is still tacky; (6) roll firmly with stitcher to remove air; (7) cure 4-12 hours at >15°C before loading. Bond strength: 60-80% of hot vulcanized bond (good for field repairs, not equivalent to hot vulcanization). The isocyanate hardener creates chemical cross-links in the adhesive film, bonding the adhesive to both the old and new rubber surfaces. Applications: conveyor belt field splicing and repair, rubber lining adhesion to vessels and chutes, and rubber-to-metal bonding in the field. Brands: Rema Tip Top (SC 4000 + E-40 hardener — the standard), Almex, Beltwin, and Belzona (for metal substrate bonding with polymer coatings).