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Interlux Interior Primer

Interlux Yacht Paint
Interior Primer 860

Interior Primer 860 is a high build, multipurpose, low VOC epoxy primer, specifically formulated for use in the interiors of all types of construction. Reduced surface preparation requirements, fast walk on time and low odor speed the application process and lower the impact on other trades. Interior Primer 860 provides excellent anticorrosive protection and holds a Surface Spread of Flame Certificate.

Part No.

Description (Click to view & order)









Colour YIC862-White, YIC866*-Gray
Finish Semi-gloss
Specific Gravity 1.45
Volume Solids 70% 
Mix Ratio Mix ratio 4:1 by volume (as supplied), Converter/Curing Agent - YIC861
Typical Shelf Life 2 yrs
VOC (As Supplied) 340 g/lt
VOC (EU Solvent) 234 g/kg EU Solvent Emissions Directive (Council Directive 1999/13/EC)
Unit Size 5 US Gallon (5.28GL once mixed) , 1 US Gallon (1.1GL once mixed)

  50F 59F 73F 95F
Hard Dry [ISO] 7hrs 5hrs 2.5hrs 1hrs
Touch Dry [ISO] 90mins 75mins 60mins 30mins
Dry To Walk On 24hrs 16hrs 7hrs 3hrs
Pot Life 3hrs 2hrs 60mins 45mins

Substrate Temperature
50F 59F 73F 95F
Overcoated By Min Max Min Max Min Max Min Max
Interior Finish 750  7hrs  12mths  5hrs  12mths  2.5hrs  12mths  1hrs  12mths
Interior Primer 860  7hrs  12mths  5hrs  12mths  2.5hrs  12mths  1hrs  12mths
Perfection  7hrs  12mths  5hrs  12mths  2.5hrs  12mths  1hrs  12mths

Note:Overcoating times quoted are when product used in dry environments. When used in wet areas, for example bilges, the maximum overcoating time for Interior Finish 750 and Perfection is reduced to 1 month. If maximum overcoating time is exceeded, use a maroon, 3M Scotch-Brite pad (7447) and scrub well.

Preparation STEEL: Degrease the surface with Thinner 910. Gritblast to SSPC-SP10/NACE 2 (Sa 2) - near white metal surface. If gritblasting is not possible, grind the metal surface with 24-36 grit abrasive discs to a uniform, clean, bright metal surface with 2-3 mils (50-75 microns) anchor pattern to an SSPC-SP-3 / St3 standard. Use angle grinder on small areas. Ensure that the substrate is contaminant/rust free prior to application of coating. Apply the first coat of Interior Primer 860 as soon as possible after the surface preparation.
STEEL with a Shop Primer: Degrease the surface with Thinner 910. Clean the surface with contaminant-free rags and ensure rust, dust, oil, grease and dirt is removed. Note: shop primer should have been applied on to a substrate where standard profile requirements have been achieved.
ALUMINUM: For dry areas: degrease the surface with Thinner 910. For wet areas: degrease the surface with Thinner 910 and scrub well using a maroon, 3M Scotch-Brite pad (7447).
STAINLESS STEEL: Degrease the surface with Thinner 910. Light gritblast to produce a profile of 2 mils (50 microns).
BARE WOOD: Sand with 120 grade (grit) paper. Remove oil from oily woods eg teak, using Thinner 910. Change cloths frequently.
LAMINATE: Closed and sound condition laminate only. Note: fibers are impregnated with resin, no fibers exposed. Degrease the surface with Thinner 910. Scrub well using a maroon, 3M Scotch-Brite pad (7447).
GELCOAT: Degrease surface with Fiberglass Solvent Wash 202 using the two cloth method. Sand with 80 grade (grit) paper. Ensure sanding debris is removed by wiping down with Fiberglass Solvent Wash 202 prior to proceeding.
POWDER COATED SURFACES: Degrease the surface with Thinner 910. Scrub well using a maroon, 3M Scotch-Brite pad (7447).

Method Remove blast/grinding/sanding residues with a clean air line & sweep with a clean brush, or vacuum clean for best results. Apply required no. of coats, detailed in the specification sheets

Hints Mixing Stir or shake individual components thoroughly. Add curing agent to the base and mix well. Add thinner as necessary. No induction required.
Thinner Recommended thinner: Thinner 910. Thinner 920 is also suitable for use if a slower thinner is required.
Cleaner Use Thinner 910 or Thinner 920 for equipment cleaning.
Ventilation and Humidity Control To achieve sufficient curing, the maximum relative air humidity should not exceed 80%. During application and drying in a confined spaces, continuous ventilation is required to extract solvent vapors for health and safety reasons and to assist the drying process.
Airless Spray 0-5% thinner may be used to ease application. Tip Size: 0.38-0.44 mm/0.015-0.017". Pressure: minimum 200 bar/2900 psi
Conventional Spray Pressure Pot - thin 10-15%. Gravity Feed Gun - thin 20-25%. Tip size: DeVilbiss and SATAjet 1.7-1.8mm/0.067-0.071", Binks 95: 66S with 66K aircap, 665 needle. Pressure: <14 psi (pot gauge)/ 44-58 psi (atomizing air pressure). Recommended flow rate 250cc (8.45floz) per minute. 2 coats may be required to achieve recommended DFT.
Brush Thin 0-5% using Thinner 920.
Roller Thin 0-5% using Thinner 920.
Other For maximum performance to be achieved, the curing temperature should be above 10C/50F. Do not apply at a thickness greater than recommended, as this may lead to solvent entrapment within the coating.

Some Important Points Do not use below 5C/40F. Do not apply over conventional (one-pack) coatings. Do not apply when there is a chance of condensation forming on the surface. Ambient temperature should be minimum 5C/41F and maximum 35C/95F. Product temperature should be minimum 10C/50F and maximum 35C/95F. Substrate temperature should be minimum 5C/41F and maximum 35C/95F. If Interior Primer 860 is over applied, the hard-dry time/walk-on time may be longer than indicated. If welding work is required apply the product no closer than 1m/3ft from weld/seam.

Compatibility/Substrates Interior Primer 860 can be used on all suitably prepared substrates and epoxy primers. It should not be used over any one pack products. Interior Primer 860 can also be applied to suitably prepared powder-coated substrates and pipework after consultation with an Interlux Paint Technical Representative.

Number of Coats 1 (check with individual specifications)

Coverage (Theoretical) - 228 (ft/Gal) (1 coat unthinned)

Recommended DFT 4.9 mils dry
Recommended WFT 6.9 mils wet

Application Methods Airless Spray, Brush, Conventional Spray, Roller , Air Assisted Airless

Exposure to air and extremes of temperature should be avoided. For the full shelf life of Interior Primer 860 to be realised ensure that between use the container is firmly closed and the temperature is between 5C/40F and 35C/95F. Keep out of direct sunlight.
Interior Primer 860 should be kept in securely closed containers during transport and storage.

Safety GENERAL: Read the label safety section for Health and Safety Information, also available from our Technical Help Line.

DISPOSAL: Do not discard tins or pour paint into water courses, use the facilities provided. It is best to allow paints to harden before disposal.
Remainders of Interior Primer 860 cannot be disposed of through the municipal waste route or dumped without permit. Disposal of remainders must be arranged for in consultation with the authorities.
Performance Yacht Systems
919 Bay Ridge Road
Annapolis, MD  21403

Toll free: 1-877-379-2248
Local: (410) 267-8681


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