UreCoat - Flexible Urethane Coating
UreCoat is a two component urethane (A+B) that can be mixed and brushed onto a variety of surfaces to provide a flexible, tough and impact resistant coating. UreCoat will bond to many surfaces and can be used as a flexible coating for expanded polystyrene (EPS foam), fabric, some metals and plastics, wood, rope (make vines for zoo exhibits) and more. Cured rubber is tough and UV resistant.
Use as a Flexible Paint Base: UreCoat is "color neutral" and is easily colored with SO-Strong , UVO or Ignite colorants to create a permanent paint for coating cured Smooth-On urethane rubbers or flexible foams. Cured UreCoat will bend and flex with the rubber or foam part.
- Mix ratio is 100A:10B by weight (gram scale required)
- Pot life is 8 minutes
- Re-coat time is 30 minutes
- Tack free time is 2 hours and
- Full cure is 16 hours at 73 F/23 C
- UreCoat contains no phthalates or VOC's
UreCoat Technical Bulletin
Amount to Mix and Apply at One Time - Because this is a coating, a small amount goes a long way. Mix only what you can comfortably brush on to your target surface in 8 minutes before material sets up.
Measuring and Mixing - Before you begin, pre-mix Part B thoroughly to re-disperse components that may have settled. A gram scale is required to accurately measure 100 Parts A to 10 Parts B. After dispensing into a mixing container, mix thoroughly for 2 - 3 minutes using a square edged mixing stick. Aggressively scrape the sides and bottom of the mixing container several times. Use the square edge of the stick to bring material off of the sides of the container and blend.
Extending Working Time - Reduce the mass of the mixture to increase working time. Example: layer two sheets of aluminum foil together and create a single-use flat tray with vertical sides to contain the liquid. After mixing parts A and B, pour mixture into the aluminum foil to reduce the mass. Your working time will be significantly increased. Applying - Apply a thin layer to the surface, making sure there are no brush strokes. Wait 30 minutes for material to partially cure and apply a second layer. Subsequent layers can be added as desired.
Thinning - To thin UreCoat , the recommended mix ratio is 100 Parts A + 10 Parts B + 25 or more Parts of mineral spirits depending on the application. Pre-mix solvent into Part A before adding Part B. Observe all safety precautions when handling solvents. Mix thoroughly to a uniform color (no streaks). Spraying UreCoat is not recommended.
Thickening - UreCoat can be thickened to a paste-like consistency for brushing or troweling onto surfaces. Ure-Fil 11 is an effective filler for thickening this material. The recommended maximum filler load when using Ure-Fil 11 is 100 parts UreCoat Part A to 10 parts UreCoat Part B to 15 parts filler by weight. Ensure filler is dry, and pre-mix filler with Part A before combining with Part B.
Surface Finish - UreCoat will cure with a high gloss surface finish. If a matte surface finish is desired, we have two recommended techniques; once UreCoat gels or partially cures (30 60 minutes after applying), lightly wipe surface with a lint-free cloth that will not shed fibers or a lightly brush surface with a soft paint brush. Do not wait until material is fully cured. Another option is to lightly dust the surface of partially cured UreCoat with powdered sugar. Once UreCoat is fully cured, the powdered sugar can be washed away with water, leaving a matte surface finish.
Curing - Allow UreCoat to cure overnight (at least 16 hours) at room temperature (73 F/23 C) before handling. Full cure time can be reduced heating the material 150 F/60 C for 4 hours. Allow UreCoat to come to room temperature before handling. Clean Up - Gently scrape as much uncured material from surface as possible with flat edge tool. Remove remaining uncured UreCoat with alcohol.