Shin-Etsu Japan 18B Primer

•         Shin-Etsu 1 8B Primer – The High-Temp Champion and Perfect Partner for Silicone Overmolding! Genuine OEM quality, engineered specifically for roller coating facilities and the silicone overmolding industry. Delivers reliable adhesion under extreme heat and prevents delamination.

•         ✅ Superior heat resistance ✅ Bonding strength increased by 50% ✅ Genuine Shin-Etsu product from Japan

Silicone Rubber Priming Adhesive – Choose Shin-Etsu 18B (Direct Supply from Ningdao)

l  Say goodbye to delamination! Shin-Etsu 18B primer bonds silicone and metal like a weld.

l  The veteran's secret weapon at the rubber mill: Shin-Etsu 18B. Strong adhesion, zero rework, and double the production efficiency.

l  Experiencing bubbles in hot vulcanization bonding? Try Shin-Etsu 18B Primer for instant adhesion and eliminate delamination risks.

l  Struggling with silicone and metal hardware not sticking? Shin-Etsu 18B is designed for high-temperature vulcanization bonding, boosting adhesion by 50%.

l  Authentic Shin-Etsu 18B, the primer trusted by the roller coating industry for 20 years, delivers bond strength that withstands peel testing.

【Why Choose Shin-Etsu 18B?

1.         Superior high-temperature performance; ready for demanding hot environments34T and 18B are both Shin-Etsu's flagship products with similar features, but 18B offers superior high-temperature resistance. Professional testing shows that the bonded layer treated with 18B can withstand 300 for extended periods.℃ High Temperature(The specific silicone must withstand temperatures up to 300°C), perfectly suited for demanding processes like high-temperature vulcanization and hot pressing. This ensures bonded products remain delamination-free and bubble-free in high-heat environments, delivering superior reliability.

2.         Genuine Original, Quality Traced: Factory-certified! Each bottle of 18B is sourced directly from Shin-Etsu in Japan with full batch traceability to eliminate counterfeit risks. Our precise molecular formula ensures consistent bonding performance, safeguarding your production line.

3.         Built to solve industry pain points: 18B overcomes bonding challenges between silicone and metals (iron, aluminum, stainless steel) or engineering plastics (PA, PPS, etc.) by using chemical bonding technology to significantly enhance adhesion. This eliminates delamination and cracking caused by mismatched thermal expansion coefficients, reduces rework rates, and boosts production efficiency.

4.         Easy to use, highly adaptableViscous liquid suitable for brush, spray, or dip application. Features flexible room-temperature or heat-curing modes. Note: The treatment agent must be fully dried before heat vulcanization bonding to accommodate varying production line schedules. Fully compatible with all silicone rubber systems to simplify processes and reduce costs.

Product Specifications

· Composition: Formulated with a unique silicone polymer and additives

· Color: Reddish-brown liquid

· Specific Gravity: 0.90 (25°C)

· Solid content (active ingredient): 20-25%

· Curing (drying) duration: 15-30 minutes (23°C, humidity ≤60%);

Bake at 100-150°C for 10-15 minutes

· Thinner: Toluene and IPA

· Shelf life: Unopened container (25°C) 12-18 months

[Lab-Verified]

Rubber Compound Curing Type Bonding Result

Ningdow CND- 2150U Flat Vulcanizer / Oven Post-Vulcanization Rubber Destructive Testing

Momentive TSE221-5U Flat Vulcanization/Oven Post-Curing Rubber Degradation

Tested according to ASTM D429-B method

Core Application Scenarios

1.         High-temperature rubber roller manufacturing: Such as hot stamping rollers, silicone-coated kitchenware, and high-temperature metal components with silicone coating. Ideal for high-intensity rubber roller applications in printing, dyeing, textile, wood machinery, and electronic equipment industries. 18B ensures durable adhesion between the silicone layer and metal core under high-temperature friction, extending roller lifespan.

2.         Precision Silicone Overmolding: Silicone bonding for metal or plastic parts requiring high-temperature resistance, such as auto parts, electronic components, and cookware handles. 18B delivers exceptional adhesion and reliability.

3.         Industrial Sealant Bonding: In hydraulic components and valves requiring high-temperature sealing, 18B ensures a robust bond between silicone and metal.

User Guide — Standardized Operations for Better Results

1.         Surface TreatmentThoroughly clean the substrate surface to ensure it is free of oil, rust, and dust.

2.         Coating Method: Apply 18B evenly to the substrate surface using a brush or spray. A thin coat is sufficient (recommended thickness: 0.5 μm).

3.         Drying and curing conditions: Room Temperature Curing: Let stand at room temperature for 15–30 minutes until the solvent has fully evaporated and the surface is dry.

◦         Heat cure (recommended): Bake at 100-150°C for 10-15 minutes for best results.

4.         Silicone BondingAfter the primer has fully cured, immediately proceed with silicone injection molding or hot vulcanization bonding.

FAQ (Customer Questions)

1.         Question: How do I choose between Shin-Etsu 1 8B and 3 4T?

Answer: After 20 years of validation by numerous customers of Dongguan Niding Company, the following comprehensive comparison can be made: Both products offer similar functionality, but...18B is a reddish-brown surface treatment agent that resists missed applications and offers superior high-temperature performance.Finished products can withstand more demanding high-temperature conditions (up to 300°C), but require special high-temperature-resistant silicone rubber for coating. Contact Ningdao sales engineers for any questions. 34T is a milky-white semi-transparent treatment agent with higher cost-performance ratio; it also withstands high temperatures (above 200°C). Excess adhesive around bonded areas is easy to clean, and since the adhesive is transparent, special cleaning may not be necessary.

2.         Q: Can 18B be used to bond silicone to gold-plated metal parts or engineering hard plastics (such as PA, PPS)?

Answer: Yes! 18B delivers excellent adhesion to metal-plated parts and rigid engineering plastics, making it the ideal choice for overmolding metals, plastics, and other hard substrates. Due to the wide variety of base materials, we recommend conducting a small-batch trial before full-scale production.

3.         How do I verify heat resistance performance?

Answer: Ningdao has gathered customer feedback from 20 years of practical use and supports sample testing by customers. The 18B demonstrates stable performance during high-temperature aging tests, with a very low adhesive strength decay rate.

Quality Assurance & After-Sales Support

•         Technical Support: Offers free process consulting and adhesive solution optimization.

•         Fast ShippingIn stock, ships within 72 hours. (Exceptions may apply.)

•         Warranty CommitmentIf verified as counterfeit, we offer 10x compensation.

Company Strength Showcase

•         20 years of industry experienceServing 0+ rubber/silicone overmolding factories and manufacturing plants.

•         100% Shin-Etsu Genuine Import from Japan, with a clear price advantage.

•          Professional Technical TeamOne-on-one solutions for bonding challenges.