Pool Mate 21 ft Winter Pool Cover for Above Ground Pools — Azure Blue, Solid Non‑Porous with Winch & 3 ft Overlap

The Pool Mate 21 ft Basic Value Line winter cover is a solid, non-porous winter closing designed to shield 21-foot round above-ground pools from snow, ice and winter debris.

Built to be a straightforward, heavy-duty winter barrier, this Pool Mate cover uses a coated azure-blue top layer and a woven polyethylene core to resist UV and hold up through the off-season. It includes a winch and cable system for perimeter anchoring, a three-foot factory overlap for easier fit, and is backed by an eight-year warranty. It is intended for traditional above-ground pools with a top rail and is not designed as an in-season debris cover.

How does this cover keep winter water and debris out of my pool?

The cover is a solid (non-permeable) winter cover that does not allow water to pass through its material, keeping rain and meltwater from entering the pool. The coated azure-blue top helps block UV exposure and reduces material degradation while sinking snow and ice rest on the surface.

• Non-porous polyethylene construction prevents water seepage.
• Coated top resists UV damage and extends life.
• Designed to support winter loads like snow and ice while floating above water.

Will this 21 ft cover fit my above-ground pool and how is it secured?

The cover is sized for 21-foot round pools but includes a 3-foot overlap, so the total material spans about 24 feet across. The supplied winch and cable thread through perimeter grommets to tighten and secure the cover; additional cover clips or wrap (sold separately) can improve anchoring where needed.

• Includes three-foot overlap for easier installation and better fit.
• Winch and cable included for perimeter fastening through grommets.
• Use cover clips or cover wrap for extra security on large-top-rail pools.

What materials, weight, and durability can I expect?

This Basic Value Line model uses 2.2 oz/yd² (about 74 g/m²) woven polyethylene with a 7 x 7 scrim pattern, giving added strength and tear resistance compared with thinner covers. Pool Mate builds this cover roughly 10% heavier than industry baseline and provides an eight-year warranty to support its expected lifespan.

• 2.2 oz/yd² polyethylene with 7 x 7 scrim for durability.
• Coated topside for UV protection and longer life.
• Constructed slightly heavier than standard covers; backed by an eight-year warranty.

How should I install and maintain the cover over winter?

Lay the cover over the closed pool allowing the three-foot overlap to drape evenly; secure the cable through the grommets and tension with the included winch. For pools with decks, position the cover across the deck area and use vinyl water weights on top; run the cable under the deck when possible for best anchoring.

• Ensure the cover floats loosely on the water—consider sizing up for large top rails.
• Place vinyl water weights on decks where applicable to hold edges flat.
• Do not use as a summer debris cover; store when not in off-season use.

Who is this cover best for? Pool Mate’s 21 ft Basic Value Line winter cover suits owners of traditional round, above-ground pools who want a reliable, budget-friendly winter closure that blocks water and resists UV. Choose this model if you value a simple installation with a built-in winch+cable system, a three-foot overlap for easier fit, and an industry-leading eight-year warranty. If your pool has unusually large top rails or nonstandard framing, consider ordering the next larger size to ensure a loose float and secure fit. Accessories such as cover clips, cover wrap, vinyl water weights, and an ice equalizer pillow are available separately for added protection.