Drain covers also called drain blockers or drain seals are flexible polyurethane mats used to temporarily seal storm drains and floor drains during a spill. They stop oil, chemicals, fuels and contaminated liquids from entering the drainage system.
The polyurethane material is tacky and flexible, so it conforms to the surface and creates a seal even on uneven concrete or grates. Place the cover over the drain and press down — it seals in under 30 seconds. No tools or adhesive are required. After the spill is cleaned up, the cover can be washed and reuse.
Available in sizes from 6-54 inch for round, square and rectangular drains. Commonly used in factories, warehouses, fuel stations, loading docks and manufacturing plants. For ongoing stormwater filtration (not emergency blocking), see our Drain Filters. Pair with Oil Spill Kits or Chemical Spill Kits for a complete first-response setup.
For round drains up to 6"
For square drains up to 12".
For round drains up to 14" dia.
For square drains up to 18".
For round drains up to 24" dia.
For square drains up to 30".
For square drains up to 36".
For square drains up to 42".
For rectangular drains up to 48" × 24".
For rectangular drains up to 54" × 30".
| Size | Shape | Typical use |
|---|---|---|
| 6" | Round | Small floor / process drains |
| 12"–18" | Square / round | Workshop and plant drains |
| 24"–36" | Round / square | Larger yard and dock drains |
| 42"–54" | Square / rectangular | Wide storm and loading-bay drains |
Measure the opening and allow at least 5 cm overlap on each side for a reliable seal.
Measure the drain opening — polyurethane drain covers come in standard sizes to fit square and round drains from 30cm to 90cm. The cover should overlap the drain edge by at least 5cm on each side to create a proper seal. For non-standard drain sizes, Enviroguard can supply custom-cut covers.
Under 30 seconds. Place the polyurethane cover over the drain opening and press down — it seals to the surface immediately. No tools, no adhesive. After the spill is cleaned up, peel it off, wash it, and store it for next time. Keep one pre-positioned within arm's reach of every drain near your chemical or oil storage areas.
Yes. A drain blocker placed over a storm drain during a spill creates an instant seal that stops oil, chemicals, and fuel from entering the drainage system. Polyurethane blockers are reusable — peel them off after cleanup, wash, and store for next time. Keep one near every drain within 10 metres of your oil or chemical storage area.