PTM&W Industries, Inc ES6249

• Very Light Weight Material
• Non-Hazardous Product - Safe to Use
• Easily Sanded & Carved with Shop Tools
• Negligible Shrinkage
• Non-Critical, 2 to 1 Ratio by Weight or Volume
• Excellent Non-Sag Properties - Even Upside Down
• Slightly Flexible Cure - Not Brittle in Thin Sections
• Excellent Adhesion to A Variety of Surfaces
• Stable Formula - No Separation of Components in Storage

PREPARATION: All surfaces to be bonded or patched must be free of dirt, oil and grease. Sanding or roughening the surface to be bonded increases the surface area and enhances the bond.

MIXING: The mix ratio of ES6249 is 2 parts resin (Part A) to 1 part hardener (Part B) by weight or volume. Measure out the correct amount of Parts A and B, combine, and mix thoroughly until a uniform color and consistency is reached. Mix for at least 1 to 2 minutes, scraping the sides and bottom of the container to avoid leaving unmixed material that will cause soft spotsin the cured epoxy. A uniform tan color, free of light or dark streaks indicates properly mixed material.

APPLICATION: After mixing, ES6249 must be used within 25 to 30 minutes for best surface wetting and adhesion. For filling pinhole porosity and shallow defects, ES6249 can be splined into the area, filling the defects and striking off the excess, leaving a smooth surface. Depending upon the final finish required, sanding of this type of repair may not be necessary, as ES6249 exhibits negligible shrinkage upon curing. For thicker sections, such as deep holes or gouges, it is advisable to apply the mixed material in layers to reach the final thickness. The layers will be applied in rapid succession. There is no need to let each layer gel or cure. The purpose of this technique is to prevent trapping air pockets that would weaken the cured material. In instances of filling large areas and irregular surfaces, it is usually not possible to apply the patching material to the exact contour. In those situations, leave the excess material on the surface, and the high spots can be easily sanded back to contour when the epoxy has cured.

CURING: ES6249 will cure completely at room temperature. This cure can be accelerated with mild heat if necessary. This heat addition can be accomplished by placing the patched part in the sunlight to warm it; by putting it into a warm room or industrial oven at very low heat; or by placing light bulbs in a box containing the part. Avoid the use of hot air guns or heat lamps, as they develop entirely too much heat, and tend to concentrate the heat in small areas. This excessive heat can cause shrinkage and improper cures.

FINISHING: ES6249 develops “green strength” rather rapidly, and at normal shop temperatures it can be carved and shaped with rasps or shaving tools in 2 to 3 hours. As it continues to cure, in 5 to 6 hours it is to the point at which it can be sanded without loading the emery cloth or sandpaper. In some instances, it may not be possible, or desirable, to sand the cured surface of ES6249. For example; patching a foam surface, or patches that will be covered with film or fabric. In these instances, the surface of the patch is smoothed to the desired shape and allowed to cure. A technique that works well here is to lay a piece of clear “cling wrap’ such as Saran Wrap over the patch and smooth it down to evenly contact the ES6249. When the patch has cured, the cling wrap can be peeled off, leaving a smooth, even surface ready to cover.

CLEANUP and SAFETY: ES6249 can be removed from hands and tools (before it gels) with warm soapy water. In general, in the case of partially gelled epoxies on tools, common solvents should remove it. Once the epoxy has cured hard on tools, abrasive action, such as wire buffer wheels or a grinder will be necessary. ES6249 is a safe, non-hazardous system with minimal potential for reaction to the user. It should be noted, however, that persons who might be overly sensitive to chemicals, due to individual body chemistry or prior exposure could show some response to any epoxy system. As with many industrial materials, if the AEROPOXY products are used in a responsible manner, and cleaned off the skin as soon as possible, the chances of adverse reaction are minimal.