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Product Details

Interlux Micron Extra is a self-polishing copolymer antifouling paint that wears down with use. Unlike some bottom paints, Micron Extra can be hauled and relaunched without repainting.

Interlux's slime blocking chemical Biolux is combined with cuprous oxide (copper) for superior protection against shell, weed and slime fouling. The copolymer compound is designed to self polish (or wear like a bar of soap) over time and use.

Extra can be used as a multi-season antifouling if 2 coats are applied and an additional stripe on highwear area like chines, rudders, sterngear and any leading edges.

Available in Black, Blue, Green, Red, and Shark White in Quart and Gallon sizes. Also available in Dark Blue and Brown in Gallon size only.

Tech Specs
Drying Information 50 Degrees F73 Degrees F95 Degrees F
Touch Dry (ISO)4 hours4 hours1 hour
Immersion16 hours16 hours16 hours
Overcoated By Min-MaxMin-MaxMin-Max
Micron CSC16 hours-16 hours-16 hours-
Info & Guides



PREVIOUSLY PAINTED SURFACES: In Good Condition Remove loose paint by sanding with 80 grade (grit) paper, wipe with Special Thinner 216. In Poor Condition Remove antifouling paint in poor condition with Interstrip Semi-Paste 299E.

BARE FIBERGLASS: Begin by scrubbing well using soap and water and a stiff brush. Rinse with fresh water and allow to dry. Wipe a small area with a clean rag that has been wetted with Fiberglass Solvent Wash 202. While the surface is still wet, wipe with a clean, dry rag. Continue this process until the entire surface has been cleaned. Sand with 80 grade (grit) paper. Remove sanding residue. Wipe with Fiberglass Solvent Wash 202. If primer is needed, sand and apply Primocon YPA984.

BARE WOOD: Sand with 80 grade (grit) paper. Wipe with Brush-Ease 433. Apply first coat reduced 10% with Special Thinner 216. Fill seams, if necessary, with Seam Compound Brown 30.

STEEL: Contact Interlux for further details.

Method At least 2 coats should be applied. Apply an extra stripe coat in areas of high wear such as chines, rudders, sterngear and any leading edges.

Hints Thinner Bare Wood - Special Thinner 216. Spray - Special Thinner 216.

Cleaner Painted Surfaces - Special Thinner 216. Bare Fiberglass - Fiberglass Solvent Wash 202. Bare Wood - Brush-Ease 433.

Airless Spray Pressure: 170-204 bar/2500-3000 psi. Tip Size: 0.53 mm/21 thou.

Conventional Spray Pressure Pot: Pressure: 4.08-4.76 bar/60-70 psi (gun pressure); 10-15 psi (pot pressure). Tip Size: 1.8-2.2 mm/70-85 thou. Other Spraying of antifouling paints is prohibited in Canada. For application of Micron CSC or Extra to underwater metals such as stainless steel, cast iron, lead and bronze, see Interprotect bulletin. Color will change on immersion, this will not affect antifouling performance.

Some Important Points Colors may fade or change color at the waterline. Shark White may turn green above the true waterline. Product temperature should be minimum 10 deg C/50 deg F and maximum 29 deg C/85 deg F. Ambient temperature should be minimum 10 deg C/50 deg F and maximum 35 deg C/95 deg F. Substrate temperature should be minimum 10 deg C/50 deg F and maximum 35 deg C/95 deg F.

Compatibility/Substrates Surface must be dry and clean, and free from grease, detaching paint etc. Micron Extra can be applied to most popular antifouling paints as long as the old coating has been aged, is tightly adhered and is in sound condition. Do not apply Micron over aluminum. Do not apply over tin-based copolymer antifouling paints.

Number of Coats 2-3 minimum Bare Wood: 3 coats (first thinned)

Coverage (Theoretical) - 439.7 (sq ft/Gal) by brush

Recommended DFT 2.0 mils dry
Recommended WFT 3.5 mils wet

Application Methods Brush, Roller, Airless Spray, Conventional Spray (Pressure Pot)

Technical Information

  • Finish: Matte
  • Specific Gravity:1.92
  • Volume Solids: 61%
  • Typical Shelf Life: 3 yrs
  • VOC (As Supplied): 400 g/lt
  • Unit Size: 1 US QUART, 1 US GALLON
  • Number of Coats:2-3 minimun, Bare Wood-3 coats (first thinned)
  • Coverage:(Theoretical) - 440 (ft²/Gal)
  • Touch Dry Time: 50°F - 3 Hrs, 73°F - 2 Hrs, 95°F - 2 Hrs
  • Method of application: Brush / Roller / Airless Spray / Conventional Spray


TRANSPORTATION: Micron CSC should be kept in securely closed containers during transport and storage.

STORAGE: Exposure to air and extremes of temperature should be avoided. For the full shelf life of Micron CSC to be realised ensure that between use the container is firmly closed and the temperature is between 5 deg C/40 deg F and 35 deg C/95 deg F. Keep out of direct sunlight.

DISPOSAL: Container Disposal: Triple Rinse (or equivalent). Then offer for recycling or reconditioning, or puncture and dispose of in a sanitary landfill or by other procedures approved by state or local authorities. Pesticide Disposal: Open dumping is prohibited. Pesticide, spray mixture or rinsate that cannot be used or chemically reprocessed should be disposed of according to procedures approved by Federal, state, or local disposal authorities.

GENERAL: Read the label safety section for Health and Safety Information, also available from our Technical Help Line. Contains biocides. Antifoulings should only be wet sanded. Never dry sand or burn-off old antifoulings. Spraying of antifouling paints is prohibited in Canada.

Reviews for Interlux Micron Extra with Biolux Bottom Paint

10 of 12 Reviews

April 19, 2021

I would buy this again
By Searay from Taylorsville, Kentucky

Verified Purchase

I have used this paint for years. Three coats gets me three seasons. I launch my boat in May and pull it out in September. Fresh water lake in Kentucky

Bottom Line Yes, I would recommend to a friend

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November 3, 2020

12 years of great protection
By Capt Craig from Jacksonville FL

Verified Purchase

Just piled and put on my 5th coat in 12 years and could not be happier. From life in the Potomac and Chesapeake to life here in Florida this paint has done the job year after year with almost zero hard growth on my Corbin 39 in all those years and locations. I currently keep her in a "freshwater" lake just of the ICW in Jacksonvillle Fl that get to the ICW by a lock. Tube worms grow there (if you don't use the boat as much like this stupid year) but simply fall off once under way. Hard growth from long stays at sea just never happens and soft growth even after months at anchor in the Keys is controlled. I will never use anything else.

Bottom Line Yes, I would recommend to a friend

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December 12, 2019

good history... mostly
By art from global cruiser

Verified Purchase

We have used micron extra for a long time....17 years. Mostly it has been good... But not always. And it does rub off too easily when you need to wipe off grass etc. We have used in varying waters...north, tropical, salt, brackish etc. We have tried others but keep coming back.... It's better than most, assuming you want ablative, but could use improvement.

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March 27, 2019

Been using this for years.
By Bill from Cape May

Verified Purchase

No grow. No slime or grass grows at water level. Multi year. You can pull boat for maintenance and put back in weeks later no issue.

Bottom Line Yes, I would recommend to a friend

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June 26, 2018

I just bought my two gallons for this haul out.
By Sailorrandy from Panhandle of Florida to Maine

Verified Purchase

I have been using Micron Extra for biannual haul outs since 2000. I recommend starting with one coat of color other than final color. On my boat, when the blue paint starts to show I know that it is time to refresh the Red.

Bottom Line Yes, I would recommend to a friend

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June 16, 2018

Worth the price, easy to apply.
By Johnnie from Brewster, MA

Verified Purchase

Very durable finish, stands up well for entire NE season. Learned about it while purchasing an Island Packet which had been in water for 12 months in North Carolina. Highly recommended.

Bottom Line Yes, I would recommend to a friend

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April 11, 2018

Long Lasting
By Kurt from Northport, MI

It's one of the longest lasting bottom paints I've ever used.

Bottom Line Yes, I would recommend to a friend

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August 10, 2015

Boat bottom paint ... made easy!!!
By JD from Ohio

Verified Purchase

After using a palm sander to take off old paint and prep & feather chipped areas, the paint rolled on easy and covered completely. Very nice paint!!!

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April 24, 2013

Exellent paint, goes on easy!!
By Don the gofer from Somerset, NJ

I used brush ease to help with rolling.

Bottom Line Yes, I would recommend to a friend

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January 7, 2013

I would buy this product again and agai
By nacho from Framingham, MA

Works well for two seasons in New England

Bottom Line Yes, I would recommend to a friend

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