2 products, shipped nationwide
Epoxy Additives
Additives that modify how an epoxy floor coating behaves, including accelerators that shorten cure time and UV packages that improve color hold. Used by contractors adjusting a system for schedule or exposure.
Epoxy Additives
2 products · $14.00 to $142.00
TCS Epoxy Accelerator
One gallon epoxy accelerator for promoting cure in cold temperature conditions and one day floor applications.
$142.00
SKU 1393
Epoxy UV Pack
8 oz UV additive pack dosed into epoxy coatings to help slow color shift under light exposure.
$14.00
SKU 1388
When an additive helps and when it just shortens your pot life
An additive changes the chemistry you already bought, so the first question is always whether the manufacturer of that specific resin approves it. Additives are not universal. A dose rate that is right for one epoxy can leave another soft, cloudy or short of full cure.
Accelerators exist for schedule and for temperature. Cold slabs slow epoxy down, sometimes to the point where the next day's coat cannot go on. An accelerator pulls that timeline in. What it also does is cut your working time, and that cut is real. If you add accelerator, reduce your batch size in the same breath, because the pot life you planned the day around no longer applies.
UV packages address the other epoxy weakness, which is ambering. They improve how the film holds color under light exposure. They do not turn an epoxy into a UV stable topcoat, so on a floor that genuinely sees sun a proper UV stable clear is still the answer.
Measure the dose. Additives are sold by a ratio to the resin, and eyeballing it is how a floor ends up with inconsistent gloss or patchy cure across bays. Mix the additive in fully at the stated point in the sequence, not after the material is already on the floor.
What to check before you order
- Confirm the additive is approved for the specific resin you are using, not just for that chemistry in general
- Check the dose rate and whether it is measured by volume or by weight
- Recalculate your batch size after adding an accelerator, since working time drops
- Confirm where in the mixing sequence the additive goes in, before or after Part B
- Check whether the additive affects gloss, color or clarity on a decorative floor
Epoxy Additives: common questions
What does an epoxy accelerator do?
An epoxy accelerator speeds up the cure of a two-component epoxy so the floor reaches recoat or traffic sooner, which matters most on cold slabs and tight schedules. The trade-off is a shorter pot life, so batches have to be mixed smaller and placed faster once accelerator is added.
Can I add an accelerator to any epoxy?
No. Epoxy accelerators are formulated for specific resins, and using one outside its approved system can leave the film soft, hazy or short of full cure. Check the manufacturer's guidance for the exact epoxy you are using, and follow the stated dose rate rather than estimating.
Does a UV additive stop epoxy from yellowing?
A UV additive improves how an epoxy film holds its color under light exposure, but it does not make epoxy behave like a UV stable topcoat. On floors with real daylight exposure, a UV stable clear coat over the epoxy is still the correct answer.
How much additive do I put in a batch of epoxy?
Epoxy additive dose rates are set by the manufacturer as a ratio to the resin volume or weight, and they should be measured rather than estimated. Adding too much can leave inconsistent cure and gloss across the floor, and it will shorten pot life more than expected.