Sansin Timber-Tec Seal ’n Hide

Flexible Sealant for Checks and Joints in Log and Timber Construction

Sansin Timber-Tec Seal ’n Hide is a 100% solids, zero-VOC mastic sealant formulated to seal and protect checks and joints in log and timber structures. It is ideal for filling cracks 3/16″ to 1/2″ wide and delivers outstanding adhesion, flexibility, and weather resistance. Designed to blend seamlessly with wood surfaces, Seal ’n Hide is paintable, stainable, and available in seven natural wood-tone colors, making it virtually invisible once applied.

What Makes Seal ’n Hide Unique?

Seal ’n Hide offers a lightly textured, non-shrinking finish that bonds tightly to interior and exterior wood, even in extreme temperatures. It resists cracking, sagging, and separation—delivering deep, durable protection with a fast cure time and zero measurable shrinkage. Unlike conventional caulks, it maintains elasticity with 350–450% elongation and is compatible with most stains and finishes. This mastic is freeze-thaw stable and maintains its flexibility down to -28°C (-20°F).

Key Benefits

• Flexible, long-lasting joint and check sealant
• Zero-VOC, solvent-free, and freeze-thaw stable
• 350–450% elongation with deep cure technology
• No shrinkage, sag, or slump after application
• Paintable and stainable to match surrounding wood
• Compatible with most wood treatments and finishes

Where to Use

• Exterior and interior log checks and cracks
• Log and timber joints up to 1/2″ wide
• Chinkless log systems and decorative beams
• High-movement cracks in vertical or horizontal logs

AVAILABLE COLORS

PLEASE NOTE:

Our colors have been optimized for accurate viewing across a variety of media. However, due to differences in how screens display color, actual color may vary. See your dealer for details.
Color may vary depending on texture, grain, color, porosity and type of wood and may not be exactly as illustrated.
Always test the purchased product on an inconspicuous part of the project to ensure the color and transparency meet expectations of your control sample.

Application Notes

Surface Preparation Requirements

• Inspect and clean surfaces thoroughly with ammonia water or alcohol
• Do not use petroleum-based cleaners or detergents that may interfere with adhesion
• Use only on dry, solid, properly prepared wood

Application

• Apply with a caulking gun or knife directly into checks and joints
• Insert backer rod to ensure proper depth and support
• Recommended joint depth: minimum 3/8″
• Recommended for checks between 3/16″ and 1/2″ wide
• Tool the joint to ensure adhesion and smooth appearance
• Clean tools with a citrus-based cleaner or soap and alcohol mixture

Coverage

Maintenance Required

Check sealant annually for signs of cracking or separation. If necessary, clean and reapply in affected areas. Minor touch-ups can be made with additional Seal ’n Hide and tool-blended into surrounding material. Proper surface preparation and annual inspection will extend performance and maintain a uniform, natural appearance.

Frequently Asked Questions

What size checks can Seal ’n Hide fill?

It is designed for checks between 3/16″ and 1/2″ wide with at least 3/8″ depth.

Can I stain over Seal ’n Hide?

Yes, it is compatible with most water- and oil-based stains once fully cured.

Does it shrink over time?

No, Seal ’n Hide is a zero-shrinkage formula with excellent dimensional stability.

Is it freeze-thaw stable?

Yes, it is not damaged by freezing and can be gunned at -1°C (30°F) when warmed.

What colors are available?

Seven standard colors: Natural, Mortar, Colonial, Oxford, Tamarack, White, and Limestone.

Is it VOC compliant?

Yes, it contains 0 VOCs and is solvent-free and non-flammable.

Can it be used inside the home?

Yes, it is safe for interior use and has a slight mint odor that disappears when cured.

How long does it take to cure?

It is tack-free in 15–40 minutes and develops full cure over 14 days under normal conditions.

What is the service temperature range?

-40°C to 38°C (-40°F to 100°F) continuous service temperature range.

What’s the shelf life?

Seal ’n Hide has a shelf life of 1 year when stored properly in a cool, dry location.

Downloads

• • 📎Sansin Seal ’n Hide Product Data Sheet (PDF)