Independent laboratory tests prove our covers are 400% more resistant to water vapor absorption than the industry standard. 

Our revolutionary material is tightly heat sealed around the foam core, preventing water vapor absorption. Be aware of other brands that wrap the foam in thin plastic, held in place with only tape.
If you've had it with replacing your water-logged cover every few years, then AccuLok quality is for you. The AccuLok hot tub cover remains lightweight and easy to use for years. Open the zipper, if the barrier is thick, black, and tightly heat sealed . . . it's AccuLok!  Latest Hot Tub Cover Technology.

AccuLok unique design is proven to save significant dollars in heating costs.

The seamless, extra long SHIELD seals the spa, preventing heat escape from the hinge section. This is where significant heat is lost on standard hot tub covers.

Take notice on your hot tub at home,that most anytime, and certainly when the hot tub is in a filtration mode with pump activity, the warmed, moist air is forced out of the fold (hinge) area. View thermal images documenting the escaping heat on traditional hot tub covers.

With AccuLok patent pending heat trapping design, our unique end heat gasket and seamless, "no gap" 7" heat shield traps warmed air. This unique design lowers your heating costs by keeping the warm air in the hot tub, not escaping through a gaping open fold.

1. Made in the USA

Handcrafted by American workers.

2. ASTM Approved

Meets or exceeds industry safety standards.

3. 28 Points of Internal Reinforcement

Every stress point is reinforced including the hinge, locking straps, skirt, and handles.

4. Strong Polyester Thread, UV and Mildew Resistant

Color-matching thread secures all seams and top-stitching. Carriage stitching assures each stitch is strong and independent of the next. No running of loosened or broken stitches.

5. Tough 'N Sturdy Hinge

Four layers of SpaTech MR 25oz. vinyl fabric adds strength to this high stress area.

6. Super Strength Padded Handles
Five layers of added strength where it's needed most.     

Heavy Duty Padded Handles

Four Locking Tie-Downs

7. Tie-Down Straps

Triple-reinforced straps secure cover to hot tub with locking fasteners. Four straps

8. Secure-Loc Fasteners

Locking key for added safety with each of four tie-down straps.

9. Tapered Foam Core

Virgin foam, NO re-grind, 1.5#, tapered from 3 1/2" to 2 1/2". Sloped for rain run-off. This taper has proven more effective than a 4" to 2". The R value is the same as our 3 1/2" to 2 1/2", but their 2" end is far too weak. The AccuLok foam core provides the optimum insulation quality and the strength needed for years of satisfying use.

10. Steel Reinforcement

Non-corrosive steel strengthens center hinge.

11. Commercial Grade Nylon Zipper

Heavy duty nylon zipper, corrosion resistant.

12. Hidden Zipper Pull Protection

Protects zipper and adds quality finished appearance.

            Full 7 year warranty. Made in the USA.

AccuLok hot tub covers are assembled by American craftsman. All materials used to build this fine product are manufactured and supplied by USA companies only. Our staff at Diverse Designs Limited, LLC backs this fine product with over 20 years of experience in the hot tub spa industry.  We deliver the cover you've asked for.