The right oil absorbent is the one that matches the liquid, the surface and the water around it, not the one with the biggest "times its weight" claim. Bonded pads, rolls and pillows suit drips and aisles; booms and socks contain a spreading liquid; granulars cover a floor and sweep up; and a caustic or acid spill needs a neutralizing sorbent instead. This guide sorts the 12 oil and spill absorbent products ERE stocks by those jobs and shows why the capacity numbers on the bag are not directly comparable.
In this guide
- Oil-only, universal or hazmat: which absorbent type do you need?
- Pads, rolls, pillows, socks or booms: which format fits the spill?
- How much oil does a roll or a bag actually absorb?
- Which granular absorbent is right: diatomaceous earth, peat or paper?
- What do you use on water, in a sump or in a monitoring well?
- What changes when the spill is a chemical and not oil?
- What happens to the absorbent after the spill?
- How do you choose an oil absorbent, step by step?
- Frequently Asked Questions
Oil-Only, Universal or Hazmat: Which Absorbent Type Do You Need?
Pick the type from the liquids on your safety data sheets. Oil-only absorbents are hydrophobic: they pull in petroleum liquids and repel water. Universal (general purpose) absorbents take up water-based liquids as well as oils. Hazmat absorbents are for chemical areas where the SDS names acids, bases or solvents. The types are not interchangeable, and the mistake is almost always the same one: an oil-only product bought for a spill that turned out to be coolant or water-based cleaner.
| Type | Takes up | Leaves behind | ERE examples |
|---|---|---|---|
| Oil only | Hydraulic oil, diesel, lube, fuel | Water | SpilKleen oil-only range, Zenith oil-only rolls, CANSORB |
| Universal | Oils, coolants, water-based fluids | Nothing selective | Zenith universal pads, Zenith all-purpose granular |
| Hazmat | Chemicals, as named on the SDS | Depends on the chemical | Zenith hazmat pillows (18 x 18 in.) |
The Canadian Centre for Occupational Health and Safety is direct about compatibility: contain a liquid spill with absorbent socks, boom, pillows or other material that is compatible with the spilled chemical, and never soak up an oxidizer with a combustible such as sawdust, because it can catch fire (CCOHS, Spill Response - Chemicals). For the kit-level view of the same choice, see our spill kit guide.
Pads, Rolls, Pillows, Socks or Booms: Which Format Fits the Spill?
Match the format to the shape of the spill. A drip under a machine is a pad or pillow job; a long aisle wants a roll you tear to length; a liquid that is running or spreading needs a sock or boom to stop it first. Both the SpilKleen range and the Zenith bonded range come in these formats, and the products in the table are the ones in the ERE catalogue.
| Format | Use it for | Sizes in the product records |
|---|---|---|
| Pads | Drips, bench and floor wipe-up, under equipment | Zenith: 15 x 18 in. in packs of 100 (universal or oil-only) and a universal pack of 25 listed at 15 x 17 in. SpilKleen: heavyweight SPK-P100, mediumweight SPK-EP100, lightweight SPK-P200 |
| Rolls | Aisles and walkways; tear off what you need | Zenith oil-only: 150 ft mediumweight or 300 ft lightweight, 30 in. wide. SpilKleen: 30 x 150 in. and 15 x 150 in. |
| Pillows | Under a leaking fitting or dispenser, in a confined spot | Zenith: hazmat 18 x 18 in. or oil-only 18 x 8 in., packs of 10. SpilKleen: 8 x 18 in., 18 x 18 in., 15 x 21 x 6 in. |
| Socks | Diking around a leak, drain or equipment base | SpilKleen: 3 x 48 in. and 3 x 120 in. |
| Booms | Containing a spreading liquid, including on water | SpilKleen: 5 in. x 10 ft and 8 in. x 10 ft |
Two build details matter. The Zenith bonded pads are 100% bonded polypropylene, which the record describes as more durable than traditional meltblown, low-linting, static resistant and made with up to 90% recycled material; they are perforated down the centre so you can split them and waste less. The SpilKleen oil-only range uses pure meltblown fibres, which the supplier calls the most cost-effective absorption technology. Those are the suppliers' own positions: bonded is sold on durability and low lint, meltblown on cost. Ask for a sample if the pads will be handled a lot.
How Much Oil Does a Roll or a Bag Actually Absorb?
Less than a headline multiplier suggests, and the numbers are not comparable across products. Both Zenith bonded pads and rolls are rated at more than 25 times their weight. Each Zenith roll variant also carries a stated volume in its name, and that is where a useful comparison hides.
| Mediumweight roll | Lightweight roll | |
|---|---|---|
| Length x width | 150 ft x 30 in. | 300 ft x 30 in. |
| Area (our arithmetic) | 375 sq ft | 750 sq ft |
| Stated volume | 40 US gal | 55 US gal |
| Volume per sq ft (our arithmetic) | about 0.107 US gal | about 0.073 US gal |
The lightweight roll holds more per roll (55 versus 40 gallons) because it is twice as long, but the mediumweight material holds about 46% more per square foot. If you are lining a drip tray, the heavier grade does more work per sheet; if you are covering a long aisle for occasional wet-ups, the lightweight roll is the better value. Two caveats: the records do not state the test method behind the gallon figures, and we have read them as the roll's rated absorbency, so confirm that with us before you size a purchase on it.
For granulars the problem is worse, because each supplier states capacity differently. Gransorb is described as absorbing its own weight (1:1), roughly 4 gallons for a 30 lb bag. Oil Gator absorbs up to six times its weight in petroleum hydrocarbons. CANSORB picks up 8 to 12 times its weight. Multi-Zorb is rated at 10 US gallons per bag. A 30 lb bag at "1:1" and a bag of peat at "8 to 12 times" are not telling you the same thing about the same liquid. Read the product data sheet for the liquid you actually handle, and treat multipliers as a ranking inside one supplier's range, not across suppliers.
Which Granular Absorbent Is Right: Diatomaceous Earth, Peat or Paper?
Use granular on a flat floor or paved area where you want to cover the spill and sweep it up, and on rough surfaces where a pad will not make contact. The material decides everything else: whether it takes water, whether it can burn, and how you dispose of it.
| Product | Material | Stated performance | Takes water? |
|---|---|---|---|
| Zenith All-Purpose Granular Sorbent | 99.5% diatomaceous earth, 25 lb | Water, grease, paint, alcohols, solvents, coolants, oils, fuels; traction aid; accepted for Canadian food processing facilities | Yes |
| SpeediKleen Premium | Diatomaceous earth, 20 lb bag | 50% more absorbency per pound than clay | Yes |
| Multi-Zorb | Universal granular, 1.5 cu ft bag | 10 US gal per bag; slip resistant; non-combustible; indoor use | Yes (universal) |
| Gransorb | 100% recycled paper, 30 lb | Dust-free, incinerable; oil and water-based fluids at about 1:1 | Yes |
| Oil Gator | Chemically modified cellulose, 30 lb | Up to 6x its weight; adds nitrogen, sulphur and phosphorus to support hydrocarbon biodegradation | Oil-based |
| CANSORB | Sphagnum peat moss, 5 lb or 20 lb compressed | 8 to 12x its weight in hydrocarbons; hydrophobic; on land or water | No (oil only) |
The practical split is wet or dry. On an outdoor yard or a dock that sees rain, a hydrophobic peat absorbent keeps taking up oil while the surface is wet; diatomaceous earth and paper granulars will absorb water too and spend capacity on it. On a dry shop floor the universal granulars are simpler, and diatomaceous earth doubles as traction on a slick floor. The Oil Gator record also notes that it is a bioremediation product, and that the type of hydrocarbon absorbed determines the right disposal route.
What Do You Use on Water, in a Sump or in a Monitoring Well?
Use oil-only booms and socks on open water or sheen, and passive skimming socks in sumps and wells. Oil-only material floats on water and leaves the water behind. The PIG sump skimming socks are the lowest-effort version: tie a rope to the sock and lower it into the sump, pit, tank, well or bilge. They come in three diameters: 1.5 in. for lifting surface oil from monitoring wells, 3 in. for small sumps and bilges, and 8 in. for large tanks and pits. The record states 500 ml absorbed per sock, 30 to a box.
Absorbent socks are a maintenance product, not a recovery system. When the oil load is continuous, move up to a skimmer or a separator that removes it at the source. Our industrial oil skimmer comparison and the oil-water separator guide cover those steps.
What Changes When the Spill Is a Chemical and Not Oil?
An absorbent alone may not make a chemical spill safe. For a caustic spill, the Zenith base spill neutralizer sorbent is a dry, 20 kg pail product that absorbs and neutralizes in one step, with colour-changing indicators that show when neutralization has occurred. CCOHS says to neutralize acids and bases according to the manufacturer's or supplier's instructions, to keep spilled chemicals out of drains, and to store used absorbent and spilled chemical in labelled containers made of compatible material without mixing incompatible wastes (CCOHS).
Two limits to respect. First, the neutralizer in our catalogue is for caustics; an acid spill needs a different product, so confirm against the SDS. Second, follow the CCOHS caution that first aid is the first priority: if a chemical reaches the eyes, flush for at least 15 minutes, and for some chemicals up to 60. Know where your eyewash station is before you need it, and check your gloves against the SDS with our EN 374 gloves guide.
What Happens to the Absorbent After the Spill?
It becomes waste, and the liquid it absorbed decides the route. CCOHS says to dispose of contaminated materials according to local environmental regulatory requirements. Product records give a few useful starting points: Gransorb is incinerable; Oil Gator can be incinerated at about 7,000 BTU per pound with less than 3% ash, or placed in a landfill or non-hazardous oil field land farm depending on the hydrocarbon absorbed; Multi-Zorb compacts for easy disposal. None of that replaces your waste hauler's acceptance criteria.
A spill that reaches a drain or the environment may also have to be reported. In Quebec, Urgence-Environnement takes accidental contaminant reports 24 hours a day at 1-866-694-5454, and Environment and Climate Change Canada lists the contacts for the other provinces and territories (Canada.ca, Report an environmental emergency). Absorbent limits what you have to clean up; it does not discharge the duty to report.
How Do You Choose an Oil Absorbent, Step by Step?
- List the liquids. Pull the SDS for every liquid stored or used in the area, including coolants and cleaners.
- Sort them. Petroleum only points to oil-only; mixed or water-based points to universal; chemicals point to hazmat or a neutralizer.
- Note the surface and the weather. Wet or outdoor areas favour hydrophobic oil-only products; dry shop floors can use universal granular.
- Choose the format by the spill's shape. Pads and pillows for drips, rolls for aisles, socks and booms to contain, granular for flat areas.
- Size by rated capacity, not by multiplier. Ask for the data sheet and the test method behind the number.
- Plan the disposal. Confirm the route for the liquid and the absorbent before you stock a large quantity.
- Stock it where the hazard is. Keep absorbents near the point of use and restock the same day.
Need help choosing an absorbent?
ERE Inc. has been Canada's environmental equipment specialist for 30+ years. Send us the liquids on your site and we will match the absorbent, format and quantity.
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Frequently Asked Questions
What is the difference between oil-only and universal absorbents?
Oil-only absorbents take up petroleum liquids and repel water. Universal absorbents take up oils and water-based liquids. Use oil-only on wet or outdoor areas with oil, and universal where fluids are mixed.
Which oil absorbent works on water?
Oil-only booms, socks and granular peat float on or sit in water and take up the oil without absorbing the water. The PIG skimming socks are lowered into sumps and wells for the same reason.
Are pads or granular absorbents better for an oil spill?
Pads suit drips and small, defined spills. Granular suits a flat area you can cover and sweep, and rough surfaces where a pad cannot make contact. Booms or socks go first when the liquid is spreading.
How much does a roll of oil absorbent hold?
The Zenith 30 in. oil-only rolls state 40 US gallons for the 150 ft mediumweight roll and 55 US gallons for the 300 ft lightweight roll. Confirm the test method with ERE before you size on those figures.
Can I use an oil absorbent on a chemical spill?
Only if the absorbent is compatible with the chemical on the SDS. For caustics, use a neutralizing sorbent. Never absorb an oxidizer with a combustible material such as sawdust.
How do I dispose of used oil absorbent?
It follows the liquid it absorbed and your local environmental rules. Store used absorbent in a labelled, compatible container and do not mix incompatible wastes. Check your waste hauler's acceptance criteria.
Related articles
- Spill Kit Guide: Oil-Only, Universal and HazMat Kits
- Industrial Oil Skimmers: 5 Types Compared
- Oil-Water Separators: The Complete Industrial Guide
- Chemical-Resistant Gloves: How to Read EN 374 Codes
Lire en français : Absorbants d'huile : tampons, rouleaux, boudins ou granulaires, comment choisir au Canada