UIRWAY 18FT Round Pool Liner Pad — 300GSM Heavy-Duty Black Geotextile Underlayment, Puncture-Resistant Cushion

UIRWAY 18FT Round Pool Liner Pad is a pre-cut, 300GSM heavy-duty geotextile underlayment designed to protect and extend the life of 18-foot above-ground pool liners.

Built from a double-layer, heat-pressed 300g/m² fabric, this black geotextile pad provides a durable barrier between the ground and your pool liner. It blocks sharp rocks, roots, sticks, and weeds while offering cushioning and thermal benefits. The one-piece, precision-cut round shape fits standard 18-foot pools from popular brands and installs in minutes with no tools required.

How does the 300G/M² fabric protect my pool liner?

The denser, heat-pressed construction increases puncture resistance compared with common 200GSM pads, creating a tighter weave that resists cuts and abrasion from below. It also cushions the liner to reduce stress points and movement during use.

• 300g/m² double-layer geotextile for stronger puncture resistance
• Heat-pressed fabric structure reduces fraying and gaps
• Cushions liner contact with rough or uneven ground
• Acts as a barrier to roots, rocks, and debris

Will it fit my above-ground pool and is installation difficult?

This pad is precut for standard 18-foot round pools and compatible with major brands like Intex, Bestway, and Summer Waves. The seamless one-piece design sits flat to minimize wrinkles and can be trimmed for custom fit; installation is as simple as unrolling and centering the pad.

• Precut round size for 18ft above-ground pools
• Seamless one-piece design for even support
• Tool-free installation—trim if needed for custom fit
• Works with soft- and hard-sided pool frames

Can the black pad affect water temperature or yard surfaces?

The black geotextile absorbs sunlight, which can modestly reduce ground heat loss and help the pool retain warmth. It also functions as a weed barrier, keeping plant growth and small debris from reaching the liner across a range of surfaces, from grass to concrete.

• Black color absorbs sunlight to retain heat
• Reduces heat transfer into the ground
• Helps prevent weeds, roots, and grass intrusion
• Compatible with grass, sand, gravel, dirt, and patio bases

How durable is the pad for family use and active backyards?

Designed for larger family pools and busy outdoor spaces, the high-density geotextile maintains stability under heavy water weight and frequent use. It resists bunching and compression, keeping the liner evenly supported season after season.

• High-density fabric stays stable under weight
• Resists shifting, bunching, and permanent compression
• Provides long-term protection to prolong liner life
• Suitable for families, gatherings, and active play areas

Who is this for: Homeowners with an 18-foot above-ground pool who want a quick, reliable way to protect their liner and improve comfort. It’s ideal for families, renters, and anyone installing a pool on grass, dirt, sand, gravel, or patio surfaces who wants a durable, pre-cut underlayment that installs without tools and helps maintain pool water temperature.