When comparing cat litter box liners—or narrowing down the best cat litter liners for your specific pan—start with box compatibility, rim closure style, and whether the liner is single-use or reusable before looking at mil thickness or "fits most" labels. This guide compares documented specifications from Jonny Cat, Van Ness, and Modkat; Pawlivy has not performed tear-resistance or leak tests or ranked an overall winner.
Identify Your Litter Box Shape and Rim Before Buying a Liner
Measure and note your litter pan's exact model, entry style (open pan, hooded, top-entry, or self-cleaning), interior floor length and width, wall height, and rim profile. A flat bag dimension that stretches across the top opening does not guarantee that the liner sits flat against the bottom corners without bridging or snagging claws. Our whole-box comparison guide explains how pans, high guards, covers, and liners interact as separate parts.
Compare Three Named Litter Liners by Box Compatibility, Closure, and Reuse
Use this four-column comparison table to check each product's documented construction alongside its compatible or explicitly excluded litter box types:
| Named Litter Liner | Documented Material, Size & Closure | Compatible & Excluded Box Types | Reuse Rule & Fit Question to Confirm |
|---|---|---|---|
| Jonny Cat Heavy Duty Liners | Low-density polyethylene (LDPE), stated 2 MIL thickness, with a drawstring tightened around the pan rim after fitting. | Excludes specialty self-cleaning, top-entry, and unusually tall boxes; advises extra care on round boxes and prohibits use where box damage could occur. | Single-use disposable liner; confirm your pan rim supports a drawstring and is not one of the excluded box designs. |
| Van Ness DL5 Jumbo Liners | 5-count pack of 2-mil plastic drawstring liners, listed at 36 × 18 inches nominal dimensions. | Marketed for jumbo open pans; the product page does not define how 36 × 18 in maps to usable floor length, width, wall depth, and rim overlap. | Single-use drawstring liner; check your pan's outer perimeter and depth rather than assuming "Jumbo" fits every oversized box. |
| Modkat Type A Liners (3-Pack) | Rip-resistant tarpaulin construction with an integrated tension band, listed at 15.8 × 15.8 × 10.5H in (40 × 40 × 27H cm). | Dedicated replacement exclusively for the original Modkat Litter Box; not compatible with Modkat Tray (Type G), Flip, or XL boxes. | Described as reusable with regular cleaning; match the exact Modkat letter code rather than buying by brand name alone. |
Jonny Cat: Check Excluded Box Styles First
The Jonny Cat FAQ explicitly excludes specialty self-cleaning litter boxes, top-entry boxes, and unusually tall pans, and notes taking extra care when fitting round pans. If your cat uses a top-entry or automated sifting box, stepping up to a larger Jonny Cat bag size does not override that design exclusion.
Van Ness DL5: Nominal Bag Dimensions vs. Pan Depth
The Van Ness DL5 product page lists 36 × 18 inches and 2-mil plastic (without naming a specific polyethylene resin). Because two flat bag numbers do not specify how much slack is needed to reach the bottom corners of a deep pan and still fold over the rim, compare your pan's full perimeter and wall height before ordering.
Modkat Type A: Match the Exact Model Letter Code
The Modkat Type A page is built specifically for the square, top-entry original Modkat Litter Box (15.8 × 15.8 × 10.5H inches) using a tailored tension band. Never substitute Type A into a Modkat Tray Type G, Flip, or XL box.
Separate Liner Changes from Full Litter-Box Washing
Even when a disposable drawstring bag or reusable tarpaulin liner lifts out cleanly, condensation, fine dust, or claw pinholes can leave residue on the plastic or steel pan underneath. Follow our litter-box cleaning guide to wash and dry the pan itself between liner changes, and browse litter-box liners and filters after recording your pan's exact dimensions and entry style.
