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Fiberglass Bottomkote With Irgarol

Fiberglass Bottomkote Boat Paint with Irgarol, Red, Qt - Interlux
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  • Hard type antifouling
  • Proven all purpose antifouling protection
  • Irgarol®™ improves antifouling performance by reducing slime
  • Solid protection against all types of fouling, including Zebra Mussels
  • Overcoats any existing bottom paint
  • Fast dry, paint and launch the same day

    Fiberglass Bottomkote is the world's most widely used antifouling paint. It provides excellent season long protection and is compatible with any other antifouling paint.

    Interlux Bottomkote® is ideally suited for cruising and power boats that desire very good, dependable protection. Soft, eroding finish, enables easy cleaning and minimal paint film build up. It has a universal application over all types of properly prepared bottom paints and surfaces (except Aluminum). Dependable, low-cost protection.

    All paint colors shown here are for guidance only. Due to differences in screen displays that are beyond our control the colors on these pages cannot be guaranteed to match the actual color in the can.

    The copper compound within the antifouling is difficult to mask with color pigments. All antifouling paints change color when they are immersed. So don't be surprised when you have finished and the color is not what you had hoped from the color chart, the true color will establish itself after the boat has been launched. Copolymer and ablative type coatings tend to fade more than hard antifouling paints.

    Along the waterline the antifouling will often look dirty or faded, and can even turn green. This is due to the reaction of the paint with oxygen forming green copper oxide. For these reasons you should try keep the paint as close to the true waterline as possible.

    Antifouling is the most common (and most important) painting job carried out by boat owners. You can very easily do a professional quality job yourself, but you must bear in mind a few important points.

    The type of antifouling you choose should be tailored to the fouling challenges in your boating area. Different water qualities and temperatures produce different types and breeds of fouling. Even in a small area the differences can be quite dramatic, due to outfalls, pollution, inflows from rivers and streams, the speed of flow of the water - and even shading from cliffs, trees and buildings.

    It is vital to protect your boat through antifouling as once fouling has a hold on your hull; it will rapidly colonize the surface, making it difficult to remove. Prevention is therefore much better than cure.

    Safety: Heavy fouling growth reduces responsiveness as well as making the boat sit lower in the water. This can have serious implications in challenging weather conditions.

    Protection: Prolonged fouling growth will damage the substrate of the hull. For example, the natural glues organisms use to attach to the hull damage wood and fiberglass.

    Speed & Efficiency: Fouling causes drag, which slows you down and increases fuel costs.

    Bottom Paint Application Chart To use this chart refer to "Different Types of Antifouling Paints." Then pick the type that is best for your boat.
    Power Boat
    Top Shelf Next Best Top Shelf Next Best
    Self-Polishing Copolymers Micron® 66 N/A Micron® 66 N/A
    Controlled Solubility Copolymers Micron® Extra Micron® CSC Micron® Extra Micron® CSC
    Ablative Fiberglass Bottomkote® ACT Super Ablative Fiberglass Bottomkote® ACT Super Ablative
    Hard Ultra, Ultra-Kote® Fiberglass Bottomkote® Ultra, Ultra-Kote® Fiberglass Bottomkote®, Trilux® 33
    Large Boats
    Used Infrequently
    Top Shelf Next Best Top Shelf Next Best
    Self-Polishing Copolymers Micron® 66 N/A Micron® 66 N/A
    Controlled Solubility Copolymers Micron® Extra Micron® CSC Micron® Extra Micron® CSC
    Ablative Fiberglass Bottomkote® ACT Super Ablative Fiberglass Bottomkote® ACT Super Ablative
    Hard Ultra, Ultra-Kote® Fiberglass Bottomkote® Ultra, Ultra-Kote® Fiberglass Bottomkote®
    Trailer Boat
    & Rack Storage
    Top Shelf Next Best Top Shelf Next Best
    Self-Polishing Copolymers Micron® 66 N/A N/A N/A
    Controlled Solubility Copolymers Micron® 66 N/A N/A N/A
    Ablative Fiberglass Bottomkote® ACT Super Ablative Fiberglass Bottomkote® ACT Super Ablative
    Hard VC® Offshore, Baltoplate, Trilux® 33 (White), VC 17m® Extra Fiberglass Bottomkote®, Fiberglass Bottomkote® Aqua Fiberglass Bottomkote® Aqua Fiberglass Bottomkote®
    Non Antifouling VC® Performance Epoxy - VC® Performance Epoxy -
    Top Shelf Next Best Top Shelf Next Best
    Self-Polishing Copolymers Micron® 66 N/A N/A N/A
    Controlled Solubility Copolymers Micron® Extra Micron® CSC Micron® Extra Micron® CSC
    Ablative Fiberglass Bottomkote® ACT Super Ablative Fiberglass Bottomkote® ACT Super Ablative
    Hard Ultra, Ultra-Kote® Fiberglass Bottomkote® Ultra, Trilux® 33 VC 17m® Extra
    Non Antifouling - - VC® Performance Epoxy -
    This chart is for guidance only. Your Boat and the conditions in which you use your boat will vary.

    Antifouling type is dictated by the quality, combinatino, quantity and type of resin.

    SELF-POLISHING COPOLYMERS - SPC technology antifoulings work because the film contains a patented resin called an 'SPC Copolymer'. This copolymer reacts with saltwater in a controlled way. As a result, the chemical reaction controls and sustains the release of biocides throughout the lifetime of the antifouling without decline. This chemical reaction will take place at the same rate whether you boat is underway or sitting at the dock. This type of technology has previously only been available in tin-based copolymer coatings, which are restricted in their use to boats over 82 feet in length. This new, patented Interlux® technology is available for professional application to boats of all sizes. It is not recommended for use in fresh water.
    For Self-Polishing Copolymers use Micron® 66®

    CONTROLLED SOLUBILITY COPOLYMERS or CONTROLLED DEPLETION POLYMERS - These types of antifoulings are partially soluble which means that as water passes across the surface of the coating, it wears down much like a bar of soap would wear away. The physical action of the water over the surface steadily reduces the thickness of the paint at a controlled rate, which results in always having fresh biocide at the surface of the paint throughout the season. For this reason these types of antifoulings have the capability to perform in the areas of highest fouling challenge. Boats painted with Controlled Solubility Copolymers can be hauled and relaunched without repainting since the biocides are chemically bound to the paint film and are only active when in the water. The longevity of these coatings is related to the thickness of the paint.
    For Controlled Solubility Copolymer Antifoulings use Micron® Extra with Biolux®, Micron® CSC or Micron® Optima.

    ABLATIVE ANTIFOULINGS - Ablative antifoulings wear away with use like the controlled depletion polymers but at a much less controlled rate. Ablative antifoulings are affected more by water temperature, salinity and alkalinity than are the controlled depletion polymers and generally wear away faster. They are less expensive than controlled depletion polymers and they provide excellent antifouling protection but they don't last as long as the controlled depletion polymers or controlled solubility copolymers.
    For Ablative Antifoulings use Fiberglass Bottomkote® ACT.

    HARD ANTIFOULINGS - The technical term for these types of antifouling paints is 'contact leaching'. The paint dries to a porous film that is packed with biocides, which leach out on contact with water to prevent fouling growth. This leaching is chemically designed to release biocide throughout the season, but the amount will steadily decrease until there is not enough biocide coming out of the paint film to maintain fouling protection. Once the biocide is exhausted, the hard paint film remains on the boat. Hard antifoulings do not retain their antifouling ability out of the water and cannot be hauled and relaunched without repainting. One of the main benefits of this type of antifouling is its resistance to abrasion and rubbing. This makes it ideal for fast powerboats, racing sailboats or boats where the owners have the bottoms scrubbed regularly. Most hard antifouling paints can be wet sanded and burnished prior to launch to reduce drag and improve hull speed.
    For Hard Antifoulings use Ultra with Biolux®, Ultra-Kote®, Fiberglass Bottomkote® or Fiberglass Bottomkote® Aqua. For Hard Racing Finishes use VC® Offshore with Teflon®, Baltoplate, VC 17m® Extra or VC 17m®.

    How much antifouling
    paint do I need?
    Powerboat Sailboat
    Waterline Length (feet) 20 25 30 35 40 20 25 30 35 40
    standard range
    3 4 6 8 10 3 4 5.5 7 9
    VC 17m / VC 17m Extra
    3 4 5.5 7.5 9.5 2.5 3 4.5 5.5 7.5

    Conventional One-Part Products This system provides a good level of protection
    Stage Product Aluminum Steel Wood
    Clean Fiberglass Solvent Wash 202 or
    Fiberglass Surface Prep YMA601
    or Special Thinner 216
    YES YES 202 or 216
    Sand - grind or sandblast grind or sandblast Sand with 80 grit sandpaper
    Surface Primer Viny-Lux Primewash 353/354 1 coat 1 coat DO NOT USE
    Primer Primocon® 1 coat 1 coat 1 coat (thinned 10-15%)
    Filler Watertite as needed as needed as needed
    Primer Primocon® 2-3 coats 2-3 coats 1-2 coats
    Antifouling Interlux® Antifouling 2-3 coats 2-3 coats 2-3 coats

    Drying Information 50 Degrees F 73 Degrees F 95 Degrees F
    Touch Dry (ISO) 3 hours 2 hours 1 hour
    Immersion 16 hours 12 hours 8 hours
    Overcoating Time 16 hrs min-72 hrs max 12 hrs min-72 hrs max 8 hrs min -72 hrs max


    Scrub the surface thoroughly with using a stiff brush and Interlux All Purpose Boat Soap. Rinse with fresh or salt water to remove loose dirt. Flush with fresh water to remove the soap residue and allow to dry. Remove mold release wax using one of the following methods. Apply Fiberglass Surface Prep YMA601 with a maroon, 3M Scotch-BriteTM pad and scrub well. Flush with fresh water or wipe off with a clean, wet cloth ensuring that no traces of Fiberglass Surface Prep remain. An alternative method would be to dampen a cheesecloth with Interlux Fiberglass Solvent Wash 202. Wipe thoroughly to remove all surface contamination and cleaners. Wipe off with a clean, dry rag before liquid dries. To be certain the contamination has been removed, run water over the surface. If the water beads up or separates, repeat one of the above methods. When the water sheets off, all contamination has be removed. Sanding does not remove contamination. After the surface has been properly prepared follow the application system below.
    Bare Fiberglass - No Sanding System: Clean surface as above. Apply one thin, continuous coat of Interlux Fiberglass No-Sand Primer with brush or roller (do not spray; do not sand). Follow application guidelines for the primer and apply Fiberglass Bottomkote® with Irgarol.
    Bare Fiberglass -Sanding System: Clean the surface following the preparation procedure above. Sand with 80 grade (grit) paper and remove sanding residue with Fiberglass Solvent Wash 202. Repair defects with Watertite, then sand and wipe clean. Apply Fiberglass Bottomkote® with Irgarol.
    BARE WOOD: Sand with 80 grade (grit) sandpaper and remove sanding residue with Special Thinner 216. Repair defects with Watertite, then sand and wipe clean. Apply first coat reduced 10% with Special Thinner 216 or Brush-Ease 433. Fill seams, if necessary, with Seam Compound Brown 30. Apply 2 further coats of Fiberglass Bottomkote® with Irgarol.
    In Good Condition: Wet sand surface with 80 grade (grit) paper to a clean firmly attached surface. Clean with Special Thinner 216.
    In Poor Condition: Use Interstrip to remove all traces of antifouling. Sand and wipe clean with Fibreglass Solvent Wash 202 for fiberglass and wood substrates. For steel, sandblast or grind to bright metal finish.

    Apply a minimum of 2 coats (3 on bare wood) by brush, short-nap roller or spray. To prevent premature failure, ensure correct amount of paint is applied using the coverage as a guide.

    Stir or shake contents thoroughly before use.
    Thinner Special Thinner 216 or Brush-Ease 433.
    Thinning Thin only if necessary. Thin no more than 10%. Use Brush-Ease 433 if roller or brush drags during application.
    Cleaner Painted Surfaces - Special Thinner 216. Bare Fiberglass - Fiberglass Solvent Wash 202 or Fiberglass Surface Prep YMA601. Bare Wood - Special Thinner 216.
    Airless Spray Tip Size: 0.53-0.66 mm/21-26 thou. Pressure: 170-204 bar/2500-3000 psi.
    Conventional Spray Pressure Pot: Tip Size: 1.8-2.2 mm/70-85 thou. Pressure: 4.08-4.76 bar/60-70 psi (gun pressure); 10-15 psi (pot pressure).
    Roller Use a 3/8" nap solvent resistant roller.
    Other Take care to apply all the paint calculated even if it means applying an extra coat. Do not apply thin coats. Fill seams if necessary in between 1st and 2nd coats of antifouling with Underwater Seam Compound 30. Spraying of antifouling paints is prohibited in Canada.

    Some Important Points
    Not suitable for use over aluminium/alloy substrates. Colors may fade or change above the waterline. Stir well before use. Product temperature should be minimum 10°C/50°F and maximum 29°C/85°F. Ambient temperature should be minimum 10°C/50°F and maximum 29°C/85°F. Substrate temperature should be minimum 10°C/50°F and maximum 29°C/85°F.

    Not suitable for use over Aluminium/Alloy substrates. Suitable for fiberglass, wood and painted surfaces. Do not apply over tin-based copolymer antifouling paints. Do not use under vinyl based antifouling paints such as VC Offshore, Baltoplate or TBT based antifoulings such as Micron 33.

    Number of Coats
    2 coats, 3 on bare wood

    (Theoretical) - 455 (ft/Gal)

    Recommended DFT
    2.0 mils dry

    Recommended WFT
    3.5 mils wet

    Application Methods
    Brush, Conventional Spray, Roller, Airless Spray

    Disclaimer: Charts apply to Interlux products only. The information provided is not intended to be exhaustive. Because iboats.com does not know how this information is being used, they cannot take responsibility for any actions as a result.

    The performance of marine paint on many factors outside the control of iboats.com, including surface preparation, proper application, and environmental conditions. Therefore, iboats.com cannot guarantee this product's suitability for your particular purpose or application.

    By purchase or use of this product, buyer agrees that the sole and exclusive remedy, if any, is limited to the refund of the purchase price or replacement of the product at iboats.com's option.

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