Koch-Chemie × THE FINISHER THE FINISHER "CoverGuard" Textile Sealant 1000ml

THE FINISHER × Koch-Chemie „CoverGuard“ — Textile Sealant for Dry, Low-Stain Boat Textiles

How does CoverGuard help on board? — The breathable marine textile sealant makes upholstery, sprayhoods, biminis & boat covers hydrophobic, slows the penetration of water/dirt, and significantly facilitates cleaning – invisible to the touch, quickly applied, long-term stable with regular washing.

THE FINISHER CoverGuard Textile Sealant reliably protects marine fabrics such as acrylic/polyester canvas, nylon, blended fabrics, and carpet runners from everyday influences: water beads off, dirt adheres less, and stain formation is reduced. The fiber remains breathable and feels close to its original state – without a greasy film. Optimal after cleaning with VinylTexClean (textile mode) and complete drying. Ideal for sprayhoods, biminis, boat covers, berth covers, seat cushions, and carpet runners in the cockpit and cabin.

• Hydrophobic Protective Film: Liquids bead off, dirt penetrates more slowly – more time to dab away, less edge formation.
• Invisible & Breathable: Feel and air permeability are maintained; no "plastic feel," no shiny spots with thin application.
• Practical & Robust: Facilitates subsequent care, shortens cleaning times, and maintains a clean appearance in everyday use on board.

Textile Sealing on Board – Hydrophobicity, Fiber Bonding & Material Understanding

Textile sealants like CoverGuard anchor themselves in a fine film on the fiber structure: Hydrophobic groups orient themselves outwards, creating beading instead of absorption and thereby reducing the rapid penetration of water and dirt. Because the film remains ultra-thin, breathability changes hardly at all – the fabric still feels "textile," not coated. Especially on acrylic/polyester canvas of sprayhoods and biminis, this effect prevents rapid "soaking" from spray or rain and facilitates subsequent, low-edge drying. On interior textiles, CoverGuard reduces everyday marks like beverage or wet clothing stains, without hardening the feel.

Application on Sprayhood, Bimini & Upholstery

Application is successful when the surface is dry, clean, and cool. After cleaning (VinylTexClean in textile mode), allow textiles to dry completely. Mist CoverGuard evenly in a crosshatch pattern in the shade, gently raise the fibers with a soft brush, and thinly re-wet until homogeneous saturation is visible – do not drench. Pay special attention to edges, seams, and high-stress zones. Immediately wipe off overspray on gelcoat/glass; plastic windows are reserved for SeaYou. Maximum hydrophobicity is achieved after 12–24 hours of drying; do not stress or wet before this time.

Durability, Aftercare & Care Plan

Durability depends on sun, salt, and washing frequency. Exposed exterior surfaces (sprayhood/bimini) naturally require earlier refreshing than cabin textiles. Check the beading level: If no more drops form, clean again, let dry, and thinly reapply CoverGuard. Sensible rhythm: Exterior surfaces every few weeks to quarterly depending on seasonal conditions, interior fabrics less frequently. Regular rinsing/washing removes salt, prevents buildup, and maintains a uniform appearance. CoverGuard complements – but does not replace – proper drying and ventilation on board.

Frequently Asked Questions about THE FINISHER × Koch-Chemie „CoverGuard“ — Textile Sealant

What materials is CoverGuard suitable for?

Acrylic/polyester canvas (sprayhood, bimini, boat cover), nylon, blended fabrics, carpet runners, and upholstery fabrics. Not for leather, vinyl, non-skid decks, or plastic windows.

Does CoverGuard change the feel or breathability?

With thin application, the feel remains close to its original state and the fiber breathable. Too much product can make the fabric feel stiffer – therefore, always work in thin layers.

How long does the sealant need to dry?

12–24 hours depending on temperature. During this time, do not stress or wet. Maximum hydrophobicity is shown afterwards.

Can I use it on windows or vinyl?

No. Treat plastic windows with SeaYou, and clean vinyl with VinylTexClean and maintain it with VinylGuard. This ensures the optics and haptics remain material-specific and correct.

How often should I refresh it?

Exposed exterior fabrics every few weeks to quarterly depending on salt/sun, interior fabrics less frequently. The beading test provides guidance: if beading decreases, reapply thinly.

Last updated: 01.11.2025 — Author: Daniel (Detailing1)