Robelle 21 ft Heavy-Duty Solid Winter Pool Cover for Above-Ground Pools — Imperial Blue, 8×8 Scrim & Winch Included

The Robelle 21 ft Heavy Duty Super Winter Pool Cover is a solid, heavy-gauge winter cover for 21-foot above-ground pools, offering a 4-foot overlap, 8×8 scrim, and an included winch and cable for secure seasonal closing.

When winter arrives, choosing a sturdy solid cover is a simple way to protect an above-ground pool from snow, ice, and environmental debris during the off-season. Robelle’s Super Winter Cover is built with heavier-than-standard polyethylene and a dense scrim weave to resist tearing and stretching while floating loosely on the water surface. It is designed specifically for traditional above-ground pools with standard top rails and comes in imperial blue with a black underside so it blocks light and helps reduce algae growth risks while stored.

How does this cover hold up against winter weather?

The cover uses robust construction to resist wind, snow load, and ice pressure. Its heavy-duty polyethylene and 8×8 scrim provide structural strength, while the solid (non-permeable) design keeps meltwater and debris on top for easy removal.

• 2.36 oz/yd² polyethylene material for increased durability
• 8×8 scrim weave improves tear resistance and dimensional stability
• Solid, light-blocking fabric prevents water passage through the material
• Designed to perform in high-wind conditions when secured correctly

What’s included and how do I install it?

The 21 ft cover ships with a winch and cable routed through perimeter grommets so you can tension and secure the cover around the pool. Installation recommends using the included hardware plus optional cover clips or cover wrap for added fastening when needed.

• Includes winch and cable for attachment through grommets
• 4-foot overlap (cover measures approximately 25 ft including overlap)
• Use water weights on decks and run cable under deck areas when applicable
• Consider sizing up if your pool top rail is unusually tall to avoid strain

Why is scrim count and material weight important?

Scrim count indicates thread density per square inch; higher scrim counts create a tougher, longer-lasting fabric. Combined with the heavier polyethylene weight, these factors are the best indicators of the cover’s strength and expected lifespan.

• 8×8 scrim = denser woven reinforcement across the sheet
• 2.36 oz/yd² (~80 g/m²) material weight for added resilience
• 18% heavier construction than many industry-standard covers
• Robust build intended to reduce punctures and premature wear

Can I use this cover during the swimming season?

This model is specifically a winter (off-season) solid cover and is not intended for routine summer debris protection. It is meant to be installed once the pool is closed for the season, floated loosely over the water, and kept secured with the supplied cable and winch.

• Not recommended as an in-season debris cover
• Solid design keeps light out and water on top for winter maintenance
• Ice equalizer pillow and extra securing accessories sold separately
• Follow manufacturer installation steps for best performance

Who is this for: Pool owners with a traditional above-ground pool around 21 feet in diameter who want a long-lasting, heavy-duty winter cover from an experienced brand. If you need a solid, non-permeable cover with generous overlap and included winch hardware—and you plan to winterize for snow and ice—this Robelle cover is built to meet those needs. Choose a larger size if your pool has an oversized top rail or unusual deck configuration to ensure the cover floats without excess stress.