Water-Based Silicone Rubber Compression Molding High Dilution Mold Release Agent

Product Specification

High Dilution 50:1 Water-Based Mold Release Agent for Silicone Rubber

Product Introduction

Lubekote LK-9700S-SI is an advanced ultra-high dilution water-based mold release agent specifically formulated for silicone rubber compression molding applications. Silicone rubber, including HTV (High Temperature Vulcanizing) and LSR (Liquid Silicone Rubber), presents unique demolding challenges due to its inherently low surface energy and tendency to adhere strongly to metal mold surfaces. Traditional release agents often fail to provide adequate release or leave silicone oil residues that contaminate parts. LK-9700S-SI solves these challenges through a proprietary polymer emulsion system that forms a micro-thin, chemically bonded release barrier on mold surfaces. With an industry-leading 50:1 water dilution ratio, it delivers exceptional cost efficiency—one liter of concentrate produces 50 liters of ready-to-use solution—making it the most economical choice for high-volume silicone rubber production.

Key Features & Benefits

• Industry-Leading 50:1 Dilution Ratio: Each liter of concentrate yields 50 liters of working solution, reducing per-part release agent cost to as low as $0.001-0.003, a 98% cost reduction compared to ready-to-use silicone sprays.
• Silicone-Free Formulation: Unlike traditional silicone oil-based release agents, LK-9700S-SI contains no silicone, preventing cross-contamination that can affect post-molding processes such as bonding, printing, or coating of silicone parts.
• Zero Transfer, Clean Parts: The cured release film remains firmly on the mold surface, ensuring demolded silicone parts are completely residue-free and ready for immediate use or secondary processing.
• Extended Mold Cleanliness of 10+ Days: The self-limiting film formation prevents progressive residue accumulation, maintaining mold surface quality and dimensional accuracy through extended production runs without cleaning stops.
• Broad Silicone Compatibility: Performs equally well with peroxide-cured HTV, platinum-cured HTV, and addition-cured LSR systems across a wide range of durometers (20-80 Shore A).
• Environmentally Responsible: VOC content below 30 g/L, meeting the strictest global environmental standards including California CARB and EU Eco-label criteria.

Why Choose Us

Our company leverages 12+ years of specialized R&D in rubber processing auxiliaries, supported by joint development programs with German and US polymer research institutes. As a certified national high-tech enterprise, we hold 10 patents (7 invention + 3 utility) in release agent and surface treatment technologies. Our ISO 9001:2015 certified production facility in Guangdong, China maintains rigorous quality control protocols including FTIR spectroscopy for batch consistency, demolding force measurement per modified ASTM D1894, and 500-cycle accelerated mold fouling tests. We have supplied over 500 tons of release agents to 200+ rubber manufacturers in 30+ countries. Our technical team provides formulation customization for specific silicone compounds, mold materials, and processing conditions. Free 1-liter evaluation samples are available with detailed application guidance and performance testing support.

Technical Parameters

Application Instructions

1. Mold Preparation: Thoroughly clean mold cavities with alkaline degreaser followed by solvent wipe. Ensure all silicone oil residues from previous release agents are completely removed. Preheat mold to 120-180°C.
2. Dilution: Mix 1 part LK-9700S-SI concentrate with 50 parts deionized/distilled water. Use a mechanical stirrer for 2-3 minutes to ensure homogeneous dispersion. Prepare only the amount needed for 1-2 days of production.
3. Application: Spray onto hot mold using an air spray gun at 2-3 bar. Apply 2-3 light, even coats. Allow 20-30 seconds between coats for water evaporation.
4. Curing: Cure for 2-3 minutes after final coat. The film thermally cross-links, forming a durable semi-permanent release layer.

Frequently Asked Questions (FAQ)

Q: Is this product compatible with platinum-cured silicone systems?
A: Yes, LK-9700S-SI is fully compatible with platinum-cured silicone. It contains no sulfur, amines, or other catalyst poisons that could inhibit platinum cure. Extensively tested with medical and food-grade platinum silicone compounds.

Q: What is the actual per-part cost at 50:1 dilution?
A: At the recommended dilution, the effective cost is approximately $0.20-0.32 per liter of ready-to-use solution, translating to roughly $0.001-0.003 per part for typical silicone molding applications, representing savings of 95-98% versus conventional spray release agents.

Q: Can it be used for LSR (Liquid Silicone Rubber) injection molding?
A: Yes, LK-9700S-SI is suitable for LSR injection molding. Apply the diluted solution to the preheated mold before starting the injection cycle. The water-based formulation flashes off quickly on hot molds (150-200°C) without cooling the mold surface.

Q: Does freezing affect the product?
A: Yes, the emulsion can be destabilized by freeze-thaw cycles. Store above 5°C at all times. If freezing occurs during transit, allow the product to return to room temperature naturally and re-disperse with mechanical agitation. Test a small batch before production use.