Concrete Mold Release Agent G-1

Our G-1 Concrete Mold Release Agent is a highly concentrated, water-soluble formula designed to provide a clean, positive release for concrete or gypsum plaster castings from polyurethane rubber molds. This eco-friendly, non-petroleum-based release agent does not interfere with surface details and actively helps minimize air bubbles and "bug holes" in your finished castings. Designed specifically for precast applications, the G-1 formula extends mold life without causing rubber softening, shrinking, or swelling.

Key Features & Benefits

• Highly Concentrated: Economical 30:1 mix ratio with water (a 32 fl. oz. bottle makes up to 7.75 gallons of ready-to-use release agent).
• Eco-Friendly Formula: Non-petroleum based and contains no oils that degrade rubber molds.
• Flawless Finish: Will not stain concrete or affect color surface detail and finishing.
• Minimizes Defects: Actively reduces "bug holes" in concrete and air bubbles in gypsum castings.
• Extends Mold Life: Keeps molds clean with no build-up, significantly extending the lifespan of your polyurethane casting molds.

Preparation & Dilution Guide

• Environment: Store and use at room temperature (73 °F / 23 °C). Do not use below 45 °F (8 °C). Wear safety glasses to minimize contamination risk.
• Pre-Mixing: Shake the container or stir thoroughly with a paddle or drill mixer on slow speed to a uniform consistency before dispensing.
• Dilution Ratio: For concrete with a low grit/high sand content (minimal abrasion), dilute 30 parts clean water to 1 part G-1. For high grit content, a 20:1 ratio is recommended.
• Mixing: Mix the solution at medium speed for 2 minutes. Only mix the amount needed for one day, as the mixture may separate after 24 hours (re-mix to a uniform consistency if necessary).

Application Instructions

• Apply a Thin Film: Apply the G-1 Release to the mold surface using a brush, roller, HVLP gun, or Non-Aerosol Sprayer in a very thin film (0.0005 in / 0.013 mm).
• Wipe Excess: Do not allow the release agent to pool in the mold. If applied in excess, allow the material to drain or gently wipe the mold surface using a clean, soft cloth.
• Caution: Do not over-apply. Applying too much concrete release agent will cause air bubbles, "wormtracks", or pitting on surfaces.
• Casting: After applying the release agent to the mold surface, you can mix and cast your concrete immediately. (Note: A small test application is always recommended if the performance of this material is in question for your specific project).