If bubbles keep surfacing in your resin, a torch is the single fastest fix — and for most people the right first buy is an inexpensive butane crème brûlée torch like the Sondiko S400. It reaches roughly 2372 F, pops surface bubbles instantly, and its small, controllable flame suits the jewelry, coasters, and small molds most makers actually pour. The nearly identical Sondiko S907 adds a transparent fuel gauge for a few dollars more. Step up to the Blazer GT8000 when you want a longer burn time and a flame you can stretch up to 5 inches for medium pieces, and reach for the Bernzomatic TS8000 propane torch only for large river tables and trays. The comparison table below lays all five side by side, but one rule overrides every spec: heat the resin in 1-3 second sweeping passes from several inches up, and never let the flame linger — that is what scorches and yellows a pour.
Why a torch beats a heat gun (and a hair dryer)
A torch does two things at once. The flame gently warms the resin surface so trapped air rises, and it burns off both the surface dust and the thin skin holding bubbles down, breaking the surface tension so they pop. A hair dryer or heat gun simply moves air around — it rarely gets hot enough to pop bubbles efficiently, and worse, the moving air blows dust into your wet pour and can make tinted colors look soft or cloudy. That is why experienced casters reach for a torch and rarely go back.
This makes the torch the finishing tool, not the degassing tool. It works the top surface of an open pour after you have poured — it does not reach bubbles buried deep in a thick casting. For deep, bubble-prone castings you crush air under pressure instead; if that is your work, see how the equipment differs in our equipment buyer’s guide. For surface-coat epoxy, art resin, coasters, jewelry, and the top of a river-table pour, the torch is exactly the right instrument.
The one technique that matters more than the torch
Before you pick a model, internalize the technique, because it matters more than the brand on the handle. Apply heat for only 1-3 seconds at a time, in a constant sweeping motion, with the torch held several inches above the surface. Repeat the pass 1-3 times and wait a few minutes between passes to let the resin cool. The single most common mistake is holding the flame still on one spot — that is what burns, yellows, and dimples the surface, and a direct flame held too long will even melt a silicone mold if you swipe too slowly.
This is also why flame temperature is less important than flame control. Every torch here runs hot enough to pop bubbles. A butane crème brûlée torch at roughly 2372 F and a propane torch at 3400 F both clear air instantly — but the propane flame is so much hotter that the margin for error shrinks, and a momentary pause scorches. The skill is the same regardless of fuel: keep it moving, keep it high, keep it brief.
Butane vs propane: which fuel for which piece
The honest answer from resin makers is to start with butane and graduate to propane only when piece size demands it. Butane torches are compact, refill from any can, and produce a smaller, lower-pressure flame that is forgiving on the small work most people do. Propane is easier to find worldwide, performs better in cold conditions, and stores at higher pressure, so it throws a much larger flame — ideal for big surfaces but unforgiving on detail.
The size of your work, not the temperature you can reach, decides the fuel. A single pointed butane flame is perfect over a coaster or a bezel and tedious over a four-foot river table. A wide propane flame clears that table in seconds and is hopelessly clumsy over a pendant. ArtResin’s own recommendation for large pieces is a propane torch head fitted with a flame-spreader clip that converts the pointed flame into a flat, wide fan — the right tool when surface area, not precision, is the problem. Read the Best For column in the table as your fuel decision: small and detailed means butane; large and flat means propane.
Tier 1 — Best for most: Sondiko S400 and S907 butane
For the overwhelming majority of makers, an inexpensive butane crème brûlée torch is the correct and complete answer. The Sondiko S400 (roughly $13-$20, butane not included) reaches about 2372 F, fires from a piezo igniter at any angle — even tilted over a mold edge — and has a flame lock for continuous burn. Its compact culinary body sits naturally in the hand for the close detail work of jewelry, coasters, and bezels.
The Sondiko S907 is the same idea with one meaningful upgrade: a transparent fuel gauge with a MAX fill line, so you stop guessing how much butane is left. It is marketed specifically for resin art, reaches roughly 2372-2500 F, and runs about 20-50 minutes per ~10 g refill with a thumb-reach flame regulator and lock for true one-handed control while your other hand steadies the piece. Between the two, the S907 is worth the small premium purely for the fuel window. The only real limitation of either is reach: a single pointed flame is slow over a large surface, so these are small-and-detail tools, not river-table tools.
Tier 2 — Step up for medium work: Blazer GT8000
When your pieces grow past the coaster-and-jewelry range, the Blazer GT8000 (roughly $55-$75) is the natural next step without leaving butane behind. Its flame is adjustable from 1.25 to a full 5.0 inches, so it covers both fine detail and medium-area sweeps that a crème brûlée torch handles slowly. A 35 g reservoir runs about 35 minutes at maximum — far longer sessions than the small ~10 g culinary torches allow — and an anti-flare brass nozzle keeps the ~2500 F flame stable and controllable.
The trade-offs are price and purpose. At three to four times the cost of a basic butane torch, it is overkill for someone who only makes jewelry, and because it is still butane it throws a single large flame rather than the wide fan a propane spreader produces. Some listings also flag it as professional/industrial rather than home use. Choose it when you regularly work medium pieces and want longer burn time and flame range than a crème brûlée torch gives — not because you expect to clear a river table with it.
Tier 3 — Large surfaces only: Bernzomatic TS8000 propane
For big surface area — river tables, large serving trays, sizable resin paintings — a propane torch is the practical tool, and the Bernzomatic TS8000 (head roughly $40-$55, fuel cylinder separate) is the standard choice. Its large ultra-swirl flame and roughly 12,936 BTU/hr output on propane clear a wide area in a single pass, and the trigger-start with a run-lock means you are not relighting between passes. It threads onto common propane or MAP-Pro cylinders available in any hardware store.
The discipline it demands is real. On propane the flame runs about 3400 F, and on MAP-Pro about 3650 F — far hotter than resin needs. That heat is an asset over a large surface and a liability everywhere else: pause for even a beat and you scorch and yellow the pour instantly. It is also the least portable option once a cylinder is attached, and it is genuinely hard to control on tiny detail pieces. Buy it for large work, keep the flame high and constantly moving, and consider the flame-spreader clip to fan the flame flat.
The niche pick: Bernzomatic ST2200T micro torch
If your work is the opposite of a river table — the finest bezels, tiny inclusions, detail that a crème brûlée flame is too broad for — the Bernzomatic ST2200T micro torch (roughly $25-$35) is the specialist. Its precision needle-point flame is the most controllable option here for spot-popping bubbles in small areas, and the self-igniting, refillable body ships with a 3-in-1 tip (micro flame, fine soldering tip, hot blower) that doubles as a soldering and detail tool on the bench. It is impractical on anything larger than small jewelry, so think of it as a complement to a crème brûlée torch rather than a replacement.
Quick troubleshooting: when the torch causes problems
Most torch problems trace back to violating the technique. Scorched or yellowed patches mean the flame lingered or sat too close — raise it, shorten the pass to 1-3 seconds, and keep it moving. Dimples or craters in the surface come from too much heat displacing the resin; back off the flame and let the pour rest between passes. Bubbles that keep returning after torching usually means the bubbles are deep in the casting rather than at the surface — a torch only reaches the top layer, so deep bubbles need pressure or vacuum instead. A melted or warped mold edge means you swiped too slowly over it; treat silicone with the same brief, high, moving flame you give the resin. If you would rather avoid an open flame entirely, weigh the trade-offs in our heat gun comparison, and browse the rest of our side-by-side comparisons to round out a studio.
Bottom line
A butane crème brûlée torch is the right tool for most resin makers, and the Sondiko S400 or fuel-gauge S907 does the job for under $25. Scale up to the Blazer GT8000 for medium pieces and longer sessions, reach for the Bernzomatic TS8000 propane torch only for large river tables and trays, and keep the ST2200T micro torch for the finest detail. Whatever you buy, the technique is the product: 1-3 second sweeping passes, several inches up, never lingering. That single habit separates a glass-clear finish from a scorched, yellowed one.