The answer depends on which type of activator you’re looking for. The most commonly searched activator is the liquid or powder used to make slime, which is made from a boron compound called borax (sodium tetraborate). But “activator” also refers to products in hair coloring, super glue bonding, and laundry bleaching, each with very different ingredients. Here’s what goes into each one.
Slime Activator Ingredients
Slime activator is built around one key ingredient: borax, also sold as 20 Mule Team Borax. When borax dissolves in water, it breaks down into borate ions. These ions act like tiny bridges between the long, flexible molecules in white glue (polyvinyl acetate), linking them together so the mixture thickens into a stretchy, semisolid mass instead of flowing like a liquid. A basic slime activator is nothing more than about a quarter teaspoon of borax stirred into a tablespoon of water.
If you’ve bought a premade slime activator from a craft store, the active ingredient is still a boron compound. Some products use liquid starch (which contains sodium tetraborate) or contact lens solution that lists boric acid and sodium borate on the label. All of these work the same way: they supply borate ions to cross-link the glue.
Safety of Boron-Based Activators
Borax is not something you want to eat, but in the small amounts used for slime, the risk is low. The European Toy Safety Directive caps boron migration from liquid or sticky toy materials at 300 mg per kilogram, and testing in 2017 found that nearly 80% of commercial slime products met that limit. A risk assessment by the German Federal Institute for Risk Assessment found that the probability of acute health effects from a child accidentally swallowing a small amount of slime (about 5 grams) remains very low even at boron levels nearly 40 times the EU limit. The main practical precaution: wash hands after playing, and keep slime away from toddlers who might put it in their mouths.
Hair Color Activator Ingredients
In hair dye kits, the bottle labeled “activator” or “developer” is a hydrogen peroxide solution. Its job is to open the hair cuticle and trigger the chemical reaction that deposits permanent color. Most consumer hair developers contain hydrogen peroxide at concentrations between 3% and 12% by weight, corresponding to the 10-volume through 40-volume strengths you see on the box.
The rest of the formula is mostly water plus stabilizers that keep the hydrogen peroxide from breaking down in the bottle before you use it. These stabilizers are acids and chelating agents that prevent metal ions in water from degrading the peroxide. Some developers also include thickeners so the mixture stays on your hair instead of dripping. The higher the peroxide percentage, the more lift (lightening) the product can achieve, which is why bleach kits use 30- or 40-volume developer while darker dye shades use 10- or 20-volume.
Super Glue Activator Ingredients
Super glue (cyanoacrylate) activator is an aerosol spray that makes the adhesive cure almost instantly instead of taking 30 seconds to a minute. It contains two main components: a chemical catalyst dissolved in a fast-evaporating solvent.
The solvent is typically a light hydrocarbon like heptane, or sometimes acetone, ethyl acetate, or another liquid with a boiling point below 100°C. It needs to evaporate quickly so only the catalyst remains on the surface. The catalyst itself is usually a sulfur- or nitrogen-containing organic compound. Common ones include compounds from the disulfide family that accelerate the polymerization reaction cyanoacrylate glues rely on. You spray the activator onto one surface, press the glued pieces together, and the catalyst triggers a near-instant bond.
Laundry and Bleach Activators
Powder laundry detergents that advertise stain removal at low temperatures often contain a bleach activator. The most widely used one is a compound abbreviated TAED (tetraacetylethylenediamine). On its own, the hydrogen peroxide in detergent works best in hot water. TAED reacts with hydrogen peroxide to produce peracetic acid, a more reactive bleaching agent that works effectively at lower wash temperatures.
This same chemistry is used in industrial textile bleaching, where cotton fabrics need to be whitened without the energy cost of heating huge volumes of water. Combining TAED with hydrogen peroxide and sodium bicarbonate (baking soda) allows near-neutral pH bleaching at temperatures well below the traditional boiling range. For the average person doing laundry, the takeaway is simple: TAED is the reason your “cold water” detergent can still remove tea and wine stains.
Orthodontic Activators
In dentistry, an “activator” is a removable appliance used to guide jaw growth in children and teens. These devices are made from dental-grade acrylic resin molded to fit the patient’s upper and lower teeth, with stainless steel wire components that provide structural support and clasping. The acrylic is the same type of medical-grade plastic used in retainers and night guards. Some designs replace the wire clasps with stainless steel crowns cemented onto specific teeth for patients who may not wear a removable appliance consistently.
Chiropractic Activators
The Activator is also a brand-name handheld instrument used by chiropractors. The current model, the Activator V, is a cordless electronic device that delivers a controlled, spring-loaded thrust at the push of a button. Internally, it runs on a rechargeable lithium-ion battery that lasts a full day on a single charge. The housing is medical-grade plastic, and the tip that contacts the patient is a small rubber-tipped plunger. It has adjustable force settings (1 through 4) and is FDA registered as a medical device.