Product Information
Description
Merlin Dura-Mesh II 18' x 36' Rectangle w/ 1' Offset Step In-Ground Pool Safety Cover
Thicker mesh, stronger cover, cleaner spring.
The Merlin Dura-Mesh II Safety Cover for 18' x 36' Rectangle w/ 1' Offset Step pools (SKU PST-20MMGR, MPN 20MMGR) is a heat treated polypropylene mesh built 33% thicker and 68% stronger than standard mesh, which is why Merlin puts a 15-year warranty behind it. The 6.4 oz per square yard weave delivers 95% shade and filters water down to 85 microns while rain and snowmelt drain straight through, so there is no cover pump and no standing water. Tensioned on Merlin's patented stainless steel springs and brass deck anchors, it meets or exceeds the ASTM F1346 safety cover standard.
68% Stronger Than Standard Mesh
Dura-Mesh II is 33% thicker and 68% stronger than ordinary standard mesh, which shows up as abrasion resistance, tear strength and burst strength where covers actually fail: at the strap joints, along the coping, and anywhere wind flap works the fabric all winter. The heat treated polypropylene weave holds its tension season after season instead of stretching out, and Merlin backs it for 15 years with the first 2 years full.
95% Shade, 85 Micron Filtration
The tighter Dura-Mesh II weave blocks 95% of sunlight and filters water to 85 microns, so most of the silt and grit that ordinary mesh passes goes back out with the debris instead of into your filter. Rain and melting snow drain straight through into the pool, which means no cover pump, no extension cord, and no pond on top of the cover for a child or pet to reach.
Merlin's Patented Spring System
Every cover ships with Merlin's patented safety cover spring (US Patent 2021/0324931 A1), stainless steel buckles, protective spring covers and non-corrosive brass concrete deck anchors that retract flush when the cover is off. Straps are heavy duty and triple stitched into specially formulated polypropylene and nylon 2-ply webbing that crosses the pool in both directions. Stainless steel and wood deck anchors are available for decks that need them.
Who It's For
Homes With Kids & Pets
Anchored and tensioned, the cover is a taut physical barrier over the water, meeting or exceeding ASTM F1346, for the months the pool sits unattended.
In-Ground Winter Closings
The straightforward pick for a seasonal closing on any in-ground pool with a concrete deck to anchor into, from a 12 x 24 to a 30 x 60.
Windy, Exposed Yards
Extra thickness and burst strength matter most where the cover flaps. Dura-Mesh II is built for the sites that chew through standard mesh.
Second Homes and Rentals
Set it in the fall and leave it. There is no cover pump to power or babysit and no water bags to refill while the property sits empty.
Why PST Customers Pick This
Real Safety Barrier
Spring tension and brass deck anchors hold the cover taut over the water, helping keep children and pets out. A water-bag winter tarp cannot do that.
33% Thicker Weave
Dura-Mesh II is 33% thicker and 68% stronger than standard mesh, with the industry's best mix of abrasion resistance, tear strength and burst strength.
No Cover Pump
Rain and snowmelt drain straight through the mesh into the pool, so there is never standing water to pump off the top.
Filters to 85 Microns
The tight weave screens fine silt at the surface instead of letting it wash down onto your liner or plaster, so spring vacuuming is far shorter.
2-Ply Webbing
Heavy duty triple stitched straps run into polypropylene and nylon 2-ply webbing, with stainless steel buckles at every spring.
Complete Install Kit
Brass concrete anchors, stainless springs and spring covers, an allen wrench, installation rod, storage bag and instructions all ship in the box.
Anchor It Right
A safety cover only performs to ASTM F1346 when every anchor is set in sound concrete and every spring is tensioned to Merlin's instructions. Recheck tension after installation and periodically through the winter, keep the cover fully anchored whenever the pool is unattended, and do not allow anyone to walk on it.
Full Specifications
Frequently Asked Questions
How is Dura-Mesh II different from ordinary standard mesh?
Dura-Mesh II is 33% thicker and 68% stronger than standard mesh at 6.4 oz per square yard, and it blocks 95% of sunlight while filtering to 85 microns. In practice that means better tear and burst strength at the strap joints, less silt getting through to the pool, and a 15-year warranty instead of the shorter terms typical of entry-level mesh.
Should I get the Dura-Mesh II or the Solid XLS cover?
Mesh lets rain and snowmelt drain straight through with no pump, and it is lighter to handle twice a year. The Solid XLS is 11.5 oz vinyl coated polyester that blocks 100% of light and every bit of debris, but it moves water through a mesh drain panel or an automatic pump. Choose solid for heavy-debris yards and the cleanest opening, mesh for the lowest maintenance.
What size cover should I order?
Order by your pool's water dimensions. A 18' x 36' cover is built for a 18' x 36' pool and the finished fabric is cut larger so it overlaps the deck and reaches the anchors on all sides. If your pool has a step section, order the matching step shape so the cover follows your outline instead of bridging over the steps.
Can I install a safety cover myself?
Most owners can. You lay the cover out, drill anchor sockets into the concrete deck with a hammer drill and masonry bit, set the included brass anchors, then stretch each spring on with the included installation rod. Merlin also offers stainless steel and wood deck anchors at extra cost. A second set of hands makes the first fit much easier.
Do I need a cover pump?
No. Mesh drains rain and snowmelt straight through into the pool, so there is nothing standing on the surface to pump off. Leaves and debris stay on top where they dry out and blow or brush away.
Which colors does Dura-Mesh II come in?
Merlin makes Dura-Mesh II in blue, green, gray, tan and black. This listing is the color shown in the title, which is the color we stock for fast shipment.
What does the 15-year warranty cover?
Merlin backs Dura-Mesh II with a 15 year limited warranty, first 2 years full and the remainder prorated, against defects in materials and workmanship. Keep your proof of purchase and run any claim through PST Pool Supplies as your authorized dealer.
Order Your Merlin Dura-Mesh II Cover
Authorized Merlin dealer. Dura-Mesh II covers ship free from PST Pool Supplies.
Additional Info
| Category | Seasonal Pool Winterizing Pool Safety Covers |
| SKU | PST-20MMGR |
| MPN | 20MMGR |
| Manufacturer | Merlin |
| Weight | 55.2 lb |
Let customers speak for us
The bulb was lost in transit and PST reached out proactively to ask if I wanted a replacement shipped out!
part was an exact fit for my old spa, price was great thanks
Fast shipping and great customer support. I appreciate all of the help in getting my spa up and working.
The cord worked perfectly when I upgraded my older Balboa spa and pump.
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Shipping and delivery were quick. Would definitely order again from PST.
Fit perfectly and works great.
Awesome item. I can control my spa from my phone!! Love it. Item was shipoed out and delivered so fast. Hooking it up was a breeze.
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Fit perfectly on our bubbler lightv
The only place I could find with the part I needed. Delivery was fast and the price was great. Best pool supply store on the web.
Part was easy to find and arrived a couple of days earlier than originally scheduled.
The ceramic spindle in the center of the original impellor broke. Replacement with this part was super easy and pump performs like new.
