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Dock Pontoons

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Environmentally Safe

Highland floats are pontoons manufactured out of the same virgin food grade high density polyethylene as municipal water pipe. 


The floats do not react with the environment.  They emit no gasses or residues.  The floats do not react with petroleum products. Are non reactive through PH 1-13

Floats will not corrode or degrade in salt or sea conditions. 


Will not rust, rot, pit or corrode

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Basic specs for

16”dia.  X  20 foot long pontoon

Weight - 250 lbs.

Min Wall: .492”

Weight:  14.5 lbs. / ft. including mount tabs and end caps

Nominal OD: 16.00" 

Buoyancy: 1500 lbs. / pontoon

3000 lbs. for two pontoons

Ideal Dead load = ½ the buoyancy or ½ the HDPE pipe in the water

Highland floats are;

A direct replacement for metal pontoons. 

  • Do not use foam as floatation.  Foam filling can be added at additional cost

  • Are able to withstand temperatures of negative 180 degrees. 

  • Are guaranteed against damage from ice.

  • Resist marine growth

Floats come in many diameters up to 160 inches to fit every floatation requirement.


Mounting tabs and end caps are fused into the float literally making the unit one piece. Fusing is much stronger than a weld.  Mounting tabs can be attached on a custom basis to conform to existing dock structures

Please see our website at: 

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Warranty Agreement

  25 Years 

Fully Transferrable

through the life of the warranty

LIMITED LIFETIME WARRANTY ON HIGHLAND FLOTATION SYSTEMS ISCO Industries, Inc. (“ISCO”), whose address is 100 Witherspoon Street, Louisville, KY, warrants that the Product described in this warranty will be leak-free, corrosion resistant and free from material defects in workmanship and materials, subject to the terms set forth herein (“Limited Warranty”). WHO MAY USE THIS WARRANTY? This warranty extends to the original purchaser of the Product and any subsequent owner or other transferee of the Product but only to the extent such individual has registered with ISCO at [] within a reasonable time from the date of purchase (the “Consumer”). WHAT IS COVERED IN THIS WARRANTY? This warranty covers normal use of the high-density polyethylene (“HDPE”) pontoon component (the “Product”) of the Highland Flotation System and does not apply to any other component of the Highland Flotation System, including but not limited to any wood framing, decking, metallic pieces, brackets, bolts or other non-HDPE material (the “Parts”). For purposes of this warranty, normal use means being floated in water and not in continuous contact with marine floor or other abrasive surfaces.  HOW LONG DOES THIS WARRANTY LAST? The term of this warranty begins on the date the product is purchased by the  original purchaser and continues for so long as the Consumer owns the Product,  not to exceed 100 years (the “Term”). WHAT WILL ISCO DO UNDER THIS WARRANTY? Subject to the below, in the event of a defect, malfunction, or other failure of the Product during the Term, ISCO will remedy the failure or defect, without charge to the Consumer. ISCO will, at ISCO’s sole option to either:        •  Repair the Product.        •  Replace the Product.        •  Refund the purchase price. ISCO will not be responsible for labor charges, installation, or other incidental or consequential costs, nor will ISCO’s liability exceed the purchase price of the Product. WHAT ARE THE WARRANTY’S EXCLUSIONS AND LIMITATIONS? This warranty does not cover damage due to: (a) transportation; (b) storage; (c) misuse; (d) neglect or (e) external causes such as accidents, abuse, or other actions  or events beyond ISCO’s reasonable control. To obtain performance of any obligation under this Limited Warranty, the Consumer must promptly contact ISCO [http://www.] or the ISCO-authorized distributor from whom the Product was originally purchased.
ISCO PROVIDES THIS LIMITED WARRANTY IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. ISCO DISCLAIMS ALL LIABILITY FOR SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES. Some states/provinces do not allow limitations of how long an implied warranty lasts or the exclusion or limitation of such damages, so these limitations and exclusions may not apply to you. This warranty gives you, the Consumer, specific legal rights. You may also have other rights that vary from state/province to state/province.
This is ISCO’s exclusive written warranty.

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