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What glue can be used for bonding silicone strips to silicone strips?
27 Oct 2026
Silicone strips feature inert, low-surface-energy surfaces. The bonded glue line must stay elastic to bend and stretch together with the silicone strip. Common adhesives like 502 super glue and ordinary AB glue become hard after curing. They crack and delaminate easily under bending. Silicone-to-silicone bonding requires dedicated silicone adhesives. The main options are as follows:
1. One‑Component Room Temperature (RTV)Adheisve--KN-300X
Curing principle: Condensation vulcanization triggered by moisture in the air at room temperature; no heating required. Highlights: Cures into flexible silicone, chemically compatible with silicone strips. It combines bonding and sealing, with good high/low temperature resistance, waterproof performance and aging resistance. Full cure takes approx. 24 hours. Best for: Butt splicing and repair of silicone strips/gaskets, silicone‑to‑silicone sealing.
2. Silicone Instant Adhesive + Surface Primer ----603/601/490+K770
Curing principle: Cyanoacrylate instant cure. The silicone surface needs pre‑treatment with primer to activate adhesion. Highlights: Fast positioning within seconds for high productivity. The cured glue layer is relatively stiff, with limited flexibility and sealing capability. Best for: Fast assembly of small silicone parts where sealing and repeated bending requirements are not critical.
3. Three‑Component High Temperature Cure Adhesive---KL-301GABC
Curing principle: After mixing Part A and Part B, crosslinking and vulcanization happen under heat inside a mold. Highlights: Offers the highest bond strength. The elasticity of the cured glue matches the silicone substrate. Heating equipment and molds are required. Best for: Mass production, high‑stress silicone strip joints and integrally molded parts.
Selection Tips
- Pick one‑component RTV silicone adhesive if you prioritize elasticity, sealing and temperature resistance.
- Choose instant adhesive paired with silicone primer when fast tack is needed.
- Use two‑component heat‑vulcanized silicone for mass production and high‑load applications. Important: Clean bonding surfaces thoroughly to remove release agent, grease and contaminants before gluing, or bonding strength will drop sharply.
