MJZ 18 FT Pool Liner Pad for Round Above-Ground Pools — Thickened Felt Underlayment, Puncture-Resistant

MJZ 18 FT Thickened Pool Liner Pad is a heavy-duty, seamless felt underlayment designed to protect round above-ground pools from punctures, provide insulation and create a smooth, slip-resistant pool floor.

Whether you’re preparing a new above-ground pool or replacing an old liner, the MJZ 18 FT pool pad delivers a thicker protective layer that reduces wear on liners, helps moderate heat transfer from the ground, and improves footing. Made from reinforced felt fabric with hot-stamped finishing, this pad is built to be durable, tear-resistant, and easy to place on common surfaces like grass, gravel, and wood decking.

How does the MJZ pad protect my pool liner from damage?

The pad adds a thick cushioning layer between the liner and the ground, preventing sharp objects and rough surfaces from cutting or abrading the liner. Its dense felt construction and strong puncture resistance increase the pool’s longevity without altering the liner installation process.

• Thickened felt fabric offers superior puncture and tear resistance
• Seamless manufacturing reduces weak spots that can tear over time
• Compatible with most above-ground pool liners and sizes

Will this pad improve comfort and safety while swimming?

Yes. The smooth, flat surface created by the pad reduces pressure points underfoot and its textured finish helps prevent slipping, so walking in the shallow end feels more comfortable and secure. It also dampens ground irregularities, making the pool floor feel more uniform.

• Soft, flat underlayer for better foot comfort
• Anti-slip properties compared to simple tarps help reduce falls
• Seamless construction minimizes ridges that cause tripping

How does the MJZ pad handle heat and different installation surfaces?

The thick felt provides thermal insulation that reduces heat transfer from hot ground surfaces into the pool, helping keep water temperature more stable. The pad’s pre-cut round shape and pliable material allow it to be laid directly on grass, gravel, sand or wood without complicated adjustments.

• Heat-resistant material slows ground-to-water heat flow
• Works on lawns, gravel, wooden decks and more without extra prep
• Can be trimmed to suit slightly different pool diameters or irregular layouts

Is installation difficult and what size choices are available?

Installation is straightforward: unroll the pad, position it under the pool base, and trim if needed. MJZ offers multiple sizes to match common pool dimensions and recommends choosing a pad slightly larger than the pool to ensure full coverage and edge protection.

• Pre-cut for quick placement under round pools
• Multiple sizes (10FT–24FT and rectangular options) to choose from
• Easily trimmed with a utility knife for a custom fit

Who is this for? The MJZ 18 FT Thickened Pool Liner Pad is aimed at above-ground pool owners who want a durable, comfortable underlayment that protects liners from punctures, improves underfoot comfort, and simplifies pool setup. It’s a practical choice for DIY installers, seasonal pool owners, and anyone installing a pool on varied surfaces like grass or gravel who wants a reliable, low-maintenance solution.