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InstaGel 20® flexible (25 shore A) brush-on mold making material. 

InstaGel 40® flexible (45 shore A) brush-on mold making material.  

UraGel 770™ rigid (85 shore D) brush-on mother mold making material and fiberglass replacement system.  

Hand Mix Brush-On Application Products InstaGel 40® & UraGel 770™ are formulated as brush-on hand applied molding products. They contain no V.O.C. and are nonflammable low odor products. After mixing equal volumes of A and B components together our molding gels transform into a creamy paste consistency. You may apply our molding gels up to 1/2- inch thickness in a single application without sagging or running. These products remain brushable for approximately 25 minutes after mixing. We recommend you allow 24 hours curing before using the finished mold. Fabric or chopped fiber can be added to enhance physical properties of cured materials. Application of the molding gels should be done in a dry environment to prevent surface bubbling. Care should be taken to scrape sides of mixing container while stirring components to insure no unmixed material remains. Clean up should be done with solvents such as mineral spirits, Methyl Ethyl Ketone (M.E.K.), or acetone.

 

InstaGel 40® (available in a softer 25 shore A version as InstaGel 20®) is a flexible, brush-on product for making rubber molds from objects or wall surfaces that cannot be placed in standard box molds (any 3 dimensional object or vertical wall surface). After mixing, InstaGel 40® thickens to a creamy spreadable gel, which can be brushed onto vertical or overhead surfaces without sagging, or running. Within 24-hours InstaGel 40® cures to a tough rubber mold, ready to use. Before applying InstaGel 40®, surfaces should be coated with silicone, wax or Parfilm mold release and must be free of moisture to prevent unwanted bonding or surface bubbling. Mold releasing agents must be used to insure easy removal of InstaGel 40® rubber mold from the master. UraGel 770™ is formulated for casting hard mother molds or plastic shells from rubber molds. It can be brushed into rubber molds 1/2-inch thick in a single application. When fully cured UraGel 770™ forms a rigid "fiberglass like" polymer which is easily sanded or machined to final form. UraGel 770™ is recommended as a rigid Mother mold back up for flexible InstaGel 40® molds. Polyester fabrics and chopped fibers can be used with these materials to enhance strength and durability. UraGel’s thick gel consistency makes it easier to work with than fiberglass. Very thick sections can be created in a single material application.

Procedure for making a brush-on mold from surface

1. Apply appropriate mold releasing agent (silicone spray, Parfilm™ spray, furniture paste wax or petroleum jelly) to surface.

2. Brush apply InstaGel 40® to entire wall area at the desired thickness (1/4" to 1/2" thickness). Allow to cure overnight before beginning step 3.

3. Apply appropriate mold releasing agent over the InstaGel 40® (silicone spray, Parfilm™ spray or furniture paste wax).

4. Apply UraGel 770™ at the desired thickness (1/4" to 1/2" thickness) over the cured InstaGel 40® and allow 24 hours cure.

After 24 hours remove the InstaGel 40® rubber mold and the UraGel 770™ back up mold from the surface. When you are ready to cast reproductions of the part surface lay the InstaGel 40® rubber mold into the rigid UraGel 770™ back up mold. Reproductions of the wall surface can be made by applying urethane, plaster or concrete into your finished mold. The rigid back up mold will help your rubber mold maintain the proper shape when it is placed on the floor and filled with casting material. Always use mold appropriate release agents to prevent unwanted bonding of parts to your rubber mold. Your mold will allow you to reproduce the exact shape and texture of the original wall surface from a variety of materials. We recommend our SpeedSet™ 350 or StyroSpray® 710 for casting lightweight wall display panels from InstaGel 40® and TrueCast™ rubber molds.

Other Uses

InstaGel 40® can be used as a strong flexible bonding adhesive for wood, fiberglass, flexible foam and masonry components. It fills large surface gaps and holds pieces together, but hardens slowly enough to permit bonded parts to be fitted or adjusted while curing.

InstaGel 40® bonds well to other urethane materials and its 2-hour set time makes it an excellent bonding adhesive for production line assembly.

UraGel 770™ is also used as adhesive, surface filler and hard coating over expanded polystyrene (E.P.S.) foam. Parts made from

UraGel 770™ can be painted with solvent base or water base paints. UraGel 770™ bonds well to other urethane materials and its 2-hour set time makes it an excellent bonding adhesive for production line assembly.

Mixing Instructions

Have all materials at 70° - 85°F before mixing. Combine A and B components together in the proper portions (see chart below). Mix thoroughly for 1 minute (1 gallon or less). While mixing, periodically scrape material off container sides to ensure proper blend. Do not overmix the material as this will reduce the viscosity of gels and cause them to become too thin. Avoid whipping air into the solution. If you are mixing quantities of ten pounds or more, we recommend using a mixing attachment (Jiffy® mixer) on an electric drill. Care should be taken to stop and scrape sides of mixing container with spatula if using an electric drill. Close containers tightly after use, liquid components of polyurethane can absorb atmospheric moisture when exposed to air.

Storage/Shelf Life

InstaGel™ and UraGel 770™ liquids should be stored in the original, unopened containers in temperatures between 64°F and 86°F (18°C and 30°C). Shelf life of materials when kept in unopened, sealed containers at the recommended storage temperature is six months. Container should not be opened until ready for immediate use. When resealing opened containers, purge with Dry-It™ spray (available from Industrial Polymers, Inc.).