The most certain answer is that there is a substance on your die that is blocking the surface from treatment. If Die-Slide is working on the remainder of the surface, it will work in spotty areas that must be cleaned thoroughly.
The shelf life of Die-Slide is one year from purchase. Once a bottle of Die-Slide or Die-Slide Renovate has been opened for use, it should be loosely capped or covered while being applied so that its volatile organic compounds (VOCs) are not allowed to escape. Left exposed to the air over prolonged periods of time, Die-Slide will lose its potency and therefore become less effective. Larger consumers of Die-Slide, who use the product a number of times daily often purchase the 4-ounce or 120 milliliters sized bottle. Smaller shops usually buy the 2-ounce or 60-milliliter amount in order to prevent constant VOC evaporation from taking place.
Die-Slide is an organic-ceramic-based compound after it is fully cured. When Die-Slide is applied, the fluid seeps in the smallest pits or crevices of the substrate and begins a chemical bonding with the surface, and that is also found in certain similar types of ceramic materials. In contrast, typical coatings such as PTFE are made to physically cling to a surface, and will detach sporadically over a period of time. However, Die-Slide wears down as would a tool, so that there will always be a certain amount of chemically bonded ceramic embedded in the surface. It is the reason is why it can be refurbished with Die-Slide Renovate.
PDMS is not in the cured Die-Slide material. When Die-Slide is applied to the edge or surface of a die, it begins a complete chemical transformation into an entirely different and singular nano-ceramic-based compound. Like many ceramics, its composition works through covalent bonding—not only to its own molecular structure, but also uniquely to the surface of the host substrate. The use of PDMS, introduced as a polymeric reactive chemical contributes to making this transformation, and ultimately is consumed completely in the process.
As presented in our instructions document—“How to Apply Die-Slide”—it is stated that less is better when determining how much liquid is to be applied to the surface of the tool. Die-Slide works because its components have chemically and specifically interacted with the substrate’s surface. An excess amount of applied Die-Slide will not cure. If you are concerned that you may have applied too much, the remedy is to clean the tool by following the same instructions you used for preparing it for the initial Die-Slide application. This will ensure that all surfaces are free of non-desirable material. Since the effective properties of Die-Slide are due to its chemical transformation, wiping the tool’s surface after application will not affect its outstanding performance.
The formulations for Die-Slide and Die-Slide Renovate are somewhat similar in chemistry, but the bonding requirement for Renovate is reduced due to the first application, and allows it to be ready for use in a shorter period of time. Die-Slide Renovate may be applied multiple times if tools wear and require it, however, original Die-Slide may be applied only once, as the original application. It is important to note that once the Renovate has been applied, the original Die-Slide will adhere to the Die-Slide Renovate product.
The five-day curing period is due to the fact that certain chemistries can’t be rushed—without creating an entirely different condition. If you were to heat the tool, for example, going beyond a threshold temperature, it will have the effect of creating no positive slip capability at all. The formulation for Die-Slide conversion takes place at ambient temperatures, meaning a safe range of between 50° to 105°F (10° to 40°C). Five days is provided as the curing time in order to ensure that maximum efficacy is achieved and that results are assured. Our chemists are researching whether there may be a way to shorten this period, but until that is possible, we strongly recommend that you work with the instructed curing time, in order to see how well Die-Slide performs for your process.
However, once Die-Slide has been cured completely, it may be used on tooling that could theoretically be heated up to operating temperatures of 1200°F (650°C), which is much higher than is required for die cutting purposes.