# Best vacuum chamber for degassing resin and silicone Source: https://resinandmold.com/best/best-vacuum-chamber-for-resin Publisher: Resin and Mold. Picks are chosen from what each Amazon listing states, not from hands-on tests. Method: https://resinandmold.com/how-we-pick Vacuum degassing pulls air out of mixed resin or silicone before the pour. It does not fix bubbles that get trapped in the mold afterward, and some epoxies must not be vacuumed at all, so check the label first. Two things decide whether a setup works: the vacuum it reaches and the room in the container. Silicone makers ask for a pump that pulls 29 inHg (about 98 kPa), and the material rises 4 to 5 times its volume, so the cup needs that much headroom. The options split into two kinds. A stainless steel vacuum chamber of 3 to 5 gallons works with a separate oil vacuum pump rated in CFM; some listings sell chamber and pump as a kit, others sell the chamber alone. A desktop epoxy resin bubble remover has a small pump built in, holds a few mixing cups and states its vacuum in kPa rather than pump flow. This guide compares seven of them by capacity, pump flow, stated vacuum and whether a pump is included, using only what each listing states. Nothing here was tested. ## Picks ### 1. VEVOR 3 Gallon Vacuum Chamber with Pump, 3.5 CFM, Single Stage Vacuum Pump, Stainless Steel Degassing Chamber Kit with Tempered Glass Lid, 5 ft Hose, for Stabilizing Wood Degassing Silicone Resin Capacity: 3 gallon; Pump flow: 3.5 CFM; Pump included: Yes, single stage; Stated vacuum: 5 Pa ultimate (pump) A 3 gallon stainless steel chamber sold with a 3.5 CFM single stage pump, tempered glass lid, gauge and 5 ft hose. A complete kit for degassing silicone and casting resin in batches larger than a desktop machine holds. What the listing offers: - The kit lists the pump, 3 gallon chamber, tempered glass lid, vacuum gauge, 5 ft hose, protective pad and a 200 ml bottle of vacuum oil. - The listing states a 3.5 CFM pump with an ultimate vacuum of 5 Pa and a silicone-oil gauge on the chamber for reading the level. - Pump housing is cast iron and die-cast aluminum with a built-in cooling fan, and the oil window has marked levels. Limits to know: - The pump runs on vacuum oil, so there is an oil level to watch and top up, and the listing gives no noise figure. - Chamber dimensions are not stated, only the 3 gallon volume, so the inside width cannot be checked against a mixing bucket. ### 2. VTG VOGTEN 3 Gallon Vacuum Chamber with Pump Capacity: 3 gallon; Pump flow: 4.5 CFM; Pump included: Yes, single stage 1/3 HP; Stated vacuum: 5 Pa ultimate (pump) A 3 gallon 304 stainless steel chamber with the highest pump flow among these kits: 4.5 CFM, single stage, 1/3 HP. A higher flow pump empties the chamber faster, which helps with silicone on a short pot life. What the listing offers: - The package lists a 3 gallon chamber, 4.5 CFM pump, 1.5 m hose, 2 silencers, a bottle of pump oil, a silicone pad, installation tools and gloves. - Pump data is specific: single stage, 1/3 HP, 4.5 CFM flow, 5 Pa ultimate vacuum, copper motor and aluminum alloy casing. - Chamber is 304 stainless steel, 9.8 in outside diameter by 11.8 in high, with a glycerin-filled gauge reading 0 to 30 inHg. Limits to know: - The listing bullets for this kit do not say what the lid is made of, which matters if you also plan to stabilize wood. - Width is given as outside diameter, so the usable inside width is a little under 9.8 in, and no noise figure is stated. ### 3. BACOENG 3 Gallon Tempered Glass Lid Vacuum Chamber with Pump, Stainless Steel Degassing Chamber Kit for Resin, Silicone, Epoxies, Stabilizing Wood and Fishing Baits Capacity: 3 gallon; Pump flow: 3.6 CFM; Pump included: Yes; Stated vacuum: -29.92 inHg A 3 gallon stainless steel chamber, 9.8 in inside diameter by 9.8 in high, with a 3.6 CFM pump and a tempered glass lid. The listing also covers stabilizing resins and plastisol, which the brand's acrylic lid kit excludes. What the listing offers: - The listing states a 3.6 CFM flow rate and -29.92 inHg vacuum for the pump, with a gauge on the chamber measuring 0 to 30 inHg. - Chamber size is given as inside measurements: 9.8 in diameter by 9.8 in high, stainless steel with a silicone gasket. - The tempered glass lid is listed as suitable for stabilizing resins, alcohol and acetone, and for plastisol fishing baits. Limits to know: - Pump horsepower and voltage are not given in this listing's bullets, and noise is described only as relatively low. - A 3 gallon chamber limits batch size once you leave 4 to 5 times headroom for rising silicone. ### 4. LET'S RESIN Airzero Resin Bubble Remover, 99kPa Remove 99% Bubbles Quickly Capacity: 3 x 8 oz or 1 x 32 oz cup; Pump flow: not stated; Pump included: Yes, built in; Stated vacuum: 99 kPa A desktop resin bubble remover with a built-in pump, a display for pressure and countdown, and room for three 8 oz cups or one 32 oz cup. Suits jewelry, coaster and small mold batches without a separate pump and oil. What the listing offers: - Holds 3 x 8 oz (240 ml) cups or 1 x 32 oz (960 ml) cup per cycle, with a silicone pad in the base. - The display screen shows pressure values and a countdown timer, and one button starts automatic bubble extraction and venting. - The listing states a 99 kPa vacuum and a cycle of 5 to 9 minutes, with a transparent lid for watching the resin. Limits to know: - Pump flow is not stated and capacity is given in cups rather than chamber volume, so it is hard to compare with CFM-rated kits. - Cup-sized capacity rules out a gallon batch of mold silicone; that job needs a 3 to 5 gallon chamber. ### 5. Resin Bubble Remover, 3.5QT Vacuum Chamber 98kPa (20L/min) Pressure Machine with Digital Display &Timer, Remove 99% Bubbles in 5-9 Min, 58-61dB for Epoxy Resin Casting, UV Resin Jewelry Making, Crafts Capacity: 3.5 qt (3.4 L); Pump flow: 20 L/min; Pump included: Yes, built in; Stated vacuum: -98 kPa A 3.5 qt desktop bubble remover that states its pump flow, 20 L/min, along with -98 kPa vacuum, an LED pressure display and a 0 to 60 minute timer. Ships with 10 mixing cups. What the listing offers: - One of the few desktop machines here to state pump flow: 20 L/min at -98 kPa, with 500 ml of epoxy degassed in 5 minutes per the listing. - The 3.5 qt (3.4 L) chamber fits 3 x 8 oz cups or 1 x 32 oz cup, and the timer adjusts from 0 to 60 minutes. - Includes 10 mixing cups, an anti-dirt pad and a charger; the polycarbonate chamber detaches for cleaning and noise is stated as 58 to 61 dB. Limits to know: - 20 L/min is roughly 0.7 CFM, far below the 3.5 to 4.5 CFM oil pumps in the chamber kits, so it suits cups, not buckets. - CFRERO is a little-known brand, and the listing bullets give no warranty detail. ### 6. Resiners AirLess Lite Resin Bubble Remover, 95kPa Vacuum Degassing Chamber Capacity: 2.23 L; Pump flow: not stated; Pump included: Yes, built in; Stated vacuum: 95 kPa The smallest machine here: a 2.23 L polycarbonate chamber with a built-in pump and one-click operation, storing at 6.5 x 6.5 x 7 inches. Sized for a single mixing cup under 500 ml (16 oz). What the listing offers: - One click starts the automatic cycle, and the listing says bubbles are drawn to the surface of resin and silicone within 10 minutes. - Fits standard mixing cups below 500 ml (16 oz) and stores at 6.5 x 6.5 x 7 inches. - The chamber is made of high-strength PC (polycarbonate) and is transparent, so the degassing is visible. Limits to know: - Stated vacuum is 95 kPa, about 28 inHg, which is under the 29 inHg that silicone makers ask of a degassing pump. - The listing warns not to pour resin directly into the chamber and notes a few surface bubbles may remain after a cycle. ### 7. BACOENG 5 Gallon Tempered Glass Lid Vacuum Chamber for Resin Capacity: 5 gallon; Pump flow: none (chamber only); Pump included: No, chamber only; Stated vacuum: 29 inHg max rated A 5 gallon stainless steel chamber with a tempered glass lid, sold without a pump. For buyers who already own a vacuum pump or need more headroom for silicone that rises 4 to 5 times its volume. What the listing offers: - The listing gives the internal size as 11.6 in high by 11.6 in inside diameter, with the gauge mounted 8.8 in from the bottom. - Silicone gasket seal with a maximum rated vacuum of up to 29 inHg at sea level, per the listing. - The tempered glass lid is listed for degassing silicones, epoxies and urethanes and also for wood stabilization. Limits to know: - This listing is the chamber only: no vacuum pump is included and the bullets do not mention a hose, so plan for both. - The listing shows two diameter figures (12.2 in and 11.6 in), so the true inside width is unclear until measured. As an Amazon Associate I earn from qualifying purchases.