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Product Details

Interlux Seam Compound is available in two versions; one for above the waterline (white), and one for below waterline (brown) applications. Seam compound Brown 30 is specifically designed to the fill seams of wooden boat bottoms and to fill keel joints that flex. Brown 30 is a tried and proven performer that remains durable and flexible after immersion to absorb expansion and contraction of planks.

White 31 compound is a tight sealing material used to fill wooden boat hull seams above the waterline. It too remains pliable to allow plank contraction and expansion. Easy to apply with a putty knife. Do not use White seam compound below the waterline. Both compounds exhibit excellent adhesive qualities when applied over properly primed surfaces.

Tech Specs
White Compound Drying Info 50 Degrees F 73 Degrees F 95 Degrees F
Touch Dry (ISO)3 hours2 hours1 hour
Sandable12 hours8 hours6 hours
Brown Compound Drying Info 3 hours2 hours1 hour
White overcoating temp Min-Max Min-Max Min-Max
Pre-Kote12 hours-12 hours-12 hours-
White Undercoat12 hours-12 hours-12 hours-
Brown overcoating temp Min-Max Min-Max Min-Max
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Ultra with Biolux48 hours-36 hours-24 hours-
ULTRA-KOTE48 hours-36 hours-24 hours-
Info & Guides

APPLICATION AND USE - SEAM COMPOUND BROWN 30

Preparation Seams must be clean and dry; free from dirt, oil, grease, sanding residue or other contamination. Extra wide seams should be first filled with caulking cotton. Before applying Seam Compound Brown, all seams must be primed.

PRIMING: Thin first coat of Interlux antifouling bottom paint of choice 10-15% by volume. Allow to dry overnight before proceeding with Seam Compound Brown 30.

Method Apply using a spatula or putty knife. Work material into all voids, on very wide or deep seams a second application may be necessary.

Hints Do not thin. Remember that shrinkage will occur when adding solvents.

Some Important Points Do not use above the 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 29 deg C/85 deg F.

Compatibility/Substrates Do not apply to bare wood. Apply to clean, dry, properly prepared surfaces only. For use below the waterline only. Do not use under vinyl based antifouling paints such as VC Offshore or Baltoplate.

Number of Coats As required

Coverage (Theoretical) - 60 (sq ft/Gal) yields 60 mils

Application Methods Knife / Spatula


APPLICATION AND USE - SEAM COMPOUND WHITE 31

Preparation Seams must be clean and dry; free from dirt, oil, grease, sanding residue or other contamination. Extra wide seams should be first filled with caulking cotton. Before applying Seam Compound White 31, all seams must be primed.

PRIMING: Thin first coat of White Undercoater 279 or Brightside Primer 10-15% by volume. Allow to dry overnight before proceeding with Seam Compound White 31.

MethodApply using a spatula or putty knife. Work material into all voids, on very wide or deep seams a second application may be necessary.

Hints Do not thin. Remember that shrinkage will occur when adding solvents.

Some Important Points Do not use below the 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 29 deg C/85 deg F.

Compatibility/Substrates Do not apply to bare wood. Apply to clean, dry, properly prepared surfaces only. For use above the waterline only.

Number of Coats As required

Coverage (Theoretical) - 60 (sq ft/Gal) yields 60 mils

Application Methods Knife / Spatula

Technical Information

  • Seam Compound Brown 30 - Technical Specifications
  • Color Y30-Brown
  • Finish Matte
  • Specific Gravity 1.848
  • Volume Solids 85%
  • VOC (As Supplied) 380 g/lt
  • Typical Shelf Life 2 yrs

  • Seam Compound White 31 - Technical Specifications
  • Color Y31-White
  • Finish Matte
  • Specific Gravity 1.965
  • Volume Solids 94%
  • VOC (As Supplied) 60 g/lt
  • Typical Shelf Life 2 yrs

TRANSPORTATION,STORAGE AND SAFETY INFORMATION

TRANSPORTATION: Seam Compound 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 Seam Compound 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: 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 Seam Compound 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.

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

WARNING: Cancer - www.P65Warnings.ca.gov

Reviews for Interlux Seam Compound

8 of 8 Reviews

December 31, 2020

Good product
By Rumrunner from Thousand Islands, NY

Verified Purchase

Sand bottom before applying to seams. Apply with two opposing knife strokes. Finish seam with rag soaked in paint thinner as you apply. Drying time is up to two days.

Bottom Line Yes, I would recommend to a friend

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December 5, 2020

Received it already cured
By Matt from San Francisco

Verified Purchase

The product was already cured and really hard when I first opened it


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May 19, 2020

I would never use this product.
By Boot from St. Joseph, Mn

Verified Purchase

Very disappointed, will return. Tried a test area would not dry in a tiny seam. Not able to sand. Very slow delivery, lots of junk e-mails before the order was confirmed.

Bottom Line Yes, I would recommend to a friend

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August 21, 2019

4th quart and I will do it again
By Esdelle from New York

Verified Purchase

Great product

Bottom Line Yes, I would recommend to a friend

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April 7, 2019

Yes
By Gidly from Columbus OH

Verified Purchase

The viscosity varies greatly from can to can. Some is way too hard to force into the seam and some had a hardened layer on top that had to be removed. Perhaps a product this specific to wooden boats ist on the shelf for a long time.

Bottom Line Yes, I would recommend to a friend

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July 29, 2018

I would not buy this product again
By LR FFO from CA 95682

Verified Purchase

It was dried out... like it had sat on a shelf in inventory a long time.. we had to use a thinner to be able to use it...

Bottom Line No, I would not recommend to a friend

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May 19, 2018

Good product,
By red right from Cape Cod

Verified Purchase

Used for seams on rebuilding beetle cat sailboat. Sets up well.

Bottom Line Yes, I would recommend to a friend

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July 5, 2011

good product, easy to apply, and to sand
By Morris from NH

Reasonable cure time, easy to sand, and seems to work well.

Bottom Line Yes, I would recommend to a friend

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