What are float drums made of?

TechniDock float drums are rotationally molded from virgin polyethylene with UV inhibitors. The seamless one-piece shell resists oil, gas, marine organisms, salt water, and fresh water. The interior is filled with steam-pressured expanded polystyrene (EPS) foam, which provides buoyancy even if the outer shell is ever punctured.

How much weight can a float drum support?

Buoyancy varies by drum size. TechniDock float drums range from approximately 100 lbs to over 2,000 lbs of buoyancy per drum depending on dimensions. The full size chart on this page lists the rated buoyancy for each of our 102 available models. As a general rule, plan for 50% of rated buoyancy as your working load to maintain adequate freeboard.

How long do float drums last?

TechniDock float drums carry a 15-year warranty to the original owner. With proper care — including seasonal removal in freeze-prone climates, correct vent plug installation, and avoiding prolonged UV exposure when out of the water — float drums routinely last 20–30 years or more.

What is the difference between standard and long-slot float drums?

Standard float drums (FF prefix) have fixed mounting slots on the top surface for attaching to a dock frame. Long-slot float drums (FFLS prefix) have extended slots that run a greater portion of the drum length, giving more flexibility in frame attachment positioning. Long-slot drums are useful when frame spacing is non-standard or when precise positioning is required.

Can float drums be used in salt water?

Yes. TechniDock float drums are manufactured from virgin polyethylene with UV inhibitors that resist salt water, oil, gas, and marine organisms. They are suitable for both fresh and salt water applications including marinas, tidal waterways, and coastal installations.

Float Drums

Home/Float Drums

TechniDock distributes a full line of high-quality dock flotation products. Our float drums provide reliable buoyancy for floating dock systems in commercial and residential applications.

Float drums are a critical component of any floating dock system. TechniDock supplies durable, UV-resistant float drums engineered to maintain consistent buoyancy over years of use. Our flotation products are compatible with a wide range of dock frame systems and are available in multiple sizes to meet your specific load requirements. Contact us to discuss the right flotation solution for your project.

TechniDock float drum — rotationally molded polyethylene dock flotation

Built to Last

Every float drum we supply is engineered for long-term performance in fresh and salt water environments.

One-Piece Seamless Shell

The plastic exterior is rotationally molded as a single seamless unit — no joints or seams that can leak or separate over time.

Virgin Polyethylene Construction

Drum walls are made from tough virgin polyethylene with UV inhibitors to resist sun damage, debris, oil, gas, marine organisms, and both salt and fresh water.

Nominal .150" Wall Thickness

A thicker-than-standard wall provides superior impact resistance and durability compared to thinner-walled alternatives on the market.

EPS Foam-Filled Interior

Steam-pressured expanded polystyrene foam fills the interior for maximum buoyancy. The foam also provides flotation if the outer shell is ever punctured.

Molded-In Mounting Slots

The flat top surface features molded-in mounting slots for easy, secure attachment to any standard dock frame — no special hardware required.

15-Year Warranty

Backed by a 15-year float drum warranty to the original owner, reflecting the manufacturer's confidence in long-term performance and durability.

Float drum cross-section diagram showing EPS foam fill, polyethylene shell, and mounting slots

Float Drum Types

With over 70 sizes available — from 1 to 4 feet wide, 3 to 8 feet long, and 8 to 36 inches high — there's a float drum for every application.

Standard Float Drum

The most versatile option for new or existing dock systems. Available in the widest range of sizes and suitable for private dock builders and large commercial marina contractors alike.

FFLS

Long Slot Float Drum

Features extended mounting slots along the top for greater flexibility in frame attachment. Ideal for dock systems that require more precise positioning or non-standard frame spacing.

FF…RND

Cylindrical Float Drum

Round-profile drums designed for wave attenuation applications such as breakwaters, barriers, and booms. Provides effective protection in exposed or high-traffic waterways.

FF…LF

Log Float Drum

A compact, lightweight option designed for log float and similar low-profile applications where minimal freeboard is required.

Quality Tested. Installation Ready.

Every float drum is continuously tested to meet or exceed the Hunt Water Absorption Test standard of 3 lbs per cubic foot. The "Falling Dart" impact test and ultrasonic wall thickness testing are standard quality procedures to ensure long service life. Detailed installation guidelines cover storage, vent plug insertion, frame support, attachment methods, and seasonal removal.

Float Drum Sizes & Specifications

Over 70 sizes available. Dimensions shown as Width × Length × Height (inches). Buoyancy in lbs. Click any part number to expand details.

Part No.	Description	Wt (lbs)	Dimensions (in)	Buoyancy (lbs)
Click any row to expand details
F-1420	Float Drum	27	12 × 48 × 20	359
F-1428	Float Drum	31	12 × 48 × 28	472
F-1.5420	Float Drum	33	18 × 48 × 20	542
F-1.5436	Float Drum	54	18 × 48 × 36	966
F-1.5616	Float Drum	45	18 × 72 × 16	620
F-1.7608	Float Drum	34	20 × 72 × 08	360
F-1.7610	Float Drum	38	20 × 72 × 10	450
F-1.7810	Float Drum	50	20 × 96 × 10	592
F-2308	Float Drum	21	24 × 36 × 08	211
F-2312	Float Drum	27	24 × 36 × 12	318
F-2316	Float Drum	30	24 × 36 × 16	436
F-2320	Float Drum	33	24 × 36 × 20	540
F-2412BM	Float Drum	30	24 × 48 × 12	409
F-2416BM	Float Drum	35	24 × 48 × 16	546
F-2408	Float Drum	27	24 × 48 × 08	288
F-2412	Float Drum	33	24 × 48 × 12	433
F-2416	Float Drum	39	24 × 48 × 16	581
F-2418	Float Drum	39	24 × 48 × 18	628
F-2420	Float Drum	44	24 × 48 × 20	729
F-2424	Float Drum	50	24 × 48 × 24	866
F-2428	Float Drum	55	24 × 48 × 28	979
F-2436	Float Drum	72	24 × 48 × 36	1,297
F-2612	Float Drum	44	24 × 72 × 12	629
F-2616	Float Drum	57	24 × 72 × 16	796
F-2808	Float Drum	53	24 × 96 × 08	562
F-2812	Float Drum	64	24 × 96 × 12	866
F-2816	Float Drum	75	24 × 96 × 16	1,155
F-2820	Float Drum	84	24 × 96 × 20	1,420
F-2828	Float Drum	88	24 × 96 × 28	1,956
F-2.5412	Float Drum	33	30 × 48 × 12	514
F-2.5416	Float Drum	38	30 × 48 × 16	712
F-2.5616	Float Drum	56	30 × 72 × 16	1,051
F-3408	Float Drum	37	36 × 48 × 08	429
F-3412	Float Drum	45	36 × 48 × 12	650
F-3416	Float Drum	51	36 × 48 × 16	874
F-3418	Float Drum	54	36 × 48 × 18	990

Part No.	Description	Wt (lbs)	Dimensions (in)	Buoyancy (lbs)
Click any row to expand details
F-3420	Float Drum	62	36 × 48 × 20	1,088
F-3424	Float Drum	66	36 × 48 × 24	1,280
F-3432	Float Drum	82	36 × 48 × 32	1,644
F-3512	Float Drum	58	36 × 60 × 12	783
F-3516	Float Drum	61	36 × 60 × 16	1,017
F-3520	Float Drum	74	36 × 60 × 20	1,328
F-3612	Float Drum	62	36 × 72 × 12	999
F-3616	Float Drum	78	36 × 72 × 16	1,313
F-3620	Float Drum	87	36 × 72 × 20	1,638
F-3624	Float Drum	99	36 × 72 × 24	1,951
F-3632	Float Drum	107	36 × 72 × 32	2,553
F-3812	Float Drum	90	36 × 96 × 12	1,331
F-3816	Float Drum	103	36 × 96 × 16	1,735
F-3820	Float Drum	112	36 × 96 × 20	2,172
F-3824	Float Drum	132	36 × 96 × 24	2,597
F-3828	Float Drum	135	36 × 96 × 28	2,928
F-3832	Float Drum	149	36 × 96 × 32	3,349
F-3.16.512	Float Drum	76	38 × 78 × 12	1,133
F-3.5612	Float Drum	70	42 × 72 × 12	1,166
F-3.5616	Float Drum	81	42 × 72 × 16	1,555
F-3.5620	Float Drum	98	42 × 72 × 20	1,934
F-4412	Float Drum	55	48 × 48 × 12	878
F-4416	Float Drum	67	48 × 48 × 16	1,182
F-4420	Float Drum	75	48 × 48 × 20	1,480
F-4424	Float Drum	83	48 × 48 × 24	1,738
F-4432	Float Drum	108	48 × 48 × 32	2,231
F-4436	Float Drum	114	48 × 48 × 36	2,480
F-4512	Float Drum	73	48 × 60 × 12	1,101
F-4516	Float Drum	80	48 × 60 × 16	1,497
F-4520	Float Drum	92	48 × 60 × 20	1,851
F-4524	Float Drum	106	48 × 60 × 24	2,199
F-4532	Float Drum	130	48 × 60 × 32	2,815
F-4612	Float Drum	78	48 × 72 × 12	1,369
F-4616	Float Drum	98	48 × 72 × 16	1,823
F-4620	Float Drum	111	48 × 72 × 20	2,225
F-4624	Float Drum	123	48 × 72 × 24	2,701

Part No.	Description	Wt (lbs)	Dimensions (in)	Buoyancy (lbs)
Click any row to expand details
F-4628	Float Drum	141	48 × 72 × 28	2,940
F-4632	Float Drum	154	48 × 72 × 32	3,457
F-4636	Float Drum	166	48 × 72 × 36	3,800
F-4712	Float Drum	89	48 × 84 × 12	1,510
F-4716	Float Drum	105	48 × 84 × 16	2,056
F-4812	Float Drum	109	48 × 96 × 12	1,803
F-4816	Float Drum	131	48 × 96 × 16	2,396
F-4820	Float Drum	145	48 × 96 × 20	2,996
F-4824	Float Drum	163	48 × 96 × 24	3,578
F-4828	Float Drum	172	48 × 96 × 28	4,017
F-4832	Float Drum	193	48 × 96 × 32	4,631
F-4-1012	Float Drum	124	48 × 120 × 12	2,118
F-4-1016	Float Drum	143	48 × 120 × 16	3,020
F-4-1020	Float Drum	177	48 × 120 × 20	3,692
F-LS1420	Long Slot Float Drum	23	12 × 48 × 20	289
F-LS2420	Long Slot Float Drum	44	24 × 48 × 20	602
F-LS2424	Long Slot Float Drum	50	24 × 48 × 24	756
F-LS3420	Long Slot Float Drum	62	36 × 48 × 20	967
F-LS3620	Long Slot Float Drum	74	36 × 72 × 20	1,474
F-LS3624	Long Slot Float Drum	82	36 × 72 × 24	1,756
F-LS3820	Long Slot Float Drum	99	36 × 96 × 20	1,978
F-LS4416	Long Slot Float Drum	67	48 × 48 × 16	1,115
F-LS4420	Long Slot Float Drum	77	48 × 48 × 20	1,367
F-LS4424	Long Slot Float Drum	86	48 × 48 × 24	1,639
F-LS4432	Long Slot Float Drum	108	48 × 48 × 32	2,129
F-LS4508	Long Slot Float Drum	51	48 × 60 × 08	720
F-LS4620	Long Slot Float Drum	96	48 × 72 × 20	2,002
F-LS4624	Long Slot Float Drum	108	48 × 72 × 24	2,396
F-LS4632	Long Slot Float Drum	130	48 × 72 × 32	3,305
F-LS4820	Long Slot Float Drum	145	48 × 96 × 20	2,894
F-LS4824	Long Slot Float Drum	163	48 × 96 × 24	3,134
F-LS4832	Long Slot Float Drum	193	48 × 96 × 32	4,438
F-2323-24RND	Cylindrical Float Drum	22	23 × 24	330
F-2308LF	Log Float Drum	21	24 × 36 × 08	194

* Cylindrical float used for wave attenuation as breakwaters, barriers, and booms. Contact us for ordering information.

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