Previously coated boats application on top of old antifouling in good condition – easy switch to Silic One System
Hempel’s Conversion Primer is a two component epoxy primer for an easy conversion from antifouling to Silic One Fouling Release System, It can be applied on previously painted antifouling in good condition.
Surface preparation: identify the condition of antifouling you currently have on your boat. Use a metal scrapper to determine whether the aged antifouling adheres sufficiently. In case of bad adhesion, remove all loose/brittle layers. Abrade with wet abrasive paper. Rinse carefully with fresh water and allow the surface to dry.
Application: mix the two components of Hempel’s Conversion Primer thoroughly to an even consistency. Be aware that the product has a very low viscosity and any runs and sags should be brushed out immediately. Thinning is NOT recommended. Pot life at 20̊C: 8 hours. Minimum application temperature is 5̊C. In case the overcoating interval is exceeded, a new coat of Hempel’s Conversion Primer or Silic One Tiecoat must be applied accordingly.
Surface preparation: identify the condition of antifouling you currently have on your boat. Use a metal scrapper to determine whether the aged antifouling adheres sufficiently. In case of bad adhesion, remove all loose/brittle layers. Abrade with wet abrasive paper. Rinse carefully with fresh water and allow the surface to dry.
Application: mix the two components of Hempel’s Conversion Primer thoroughly to an even consistency. Be aware that the product has a very low viscosity and any runs and sags should be brushed out immediately. Thinning is NOT recommended. Pot life at 20̊C: 8 hours. Minimum application temperature is 5̊C. In case the overcoating interval is exceeded, a new coat of Hempel’s Conversion Primer or Silic One Tiecoat must be applied accordingly.



*Apply Silic One Tiecoat as soon as previous coat of Conversion Primer is dry to touch. The Silic One Tiecoat must be applied to full coverage to ensure adhesion.
**After 48 hours surface must be cleaned with Pre-Clean 67602, rinsed with fresh water and allowed to dry before applying the next coat. Overcoating must be carried out as soon as possible after surface has dried.
**After 48 hours surface must be cleaned with Pre-Clean 67602, rinsed with fresh water and allowed to dry before applying the next coat. Overcoating must be carried out as soon as possible after surface has dried.
View products
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Hempel's Conversion Primer
Hempel's Conversion Primer is a two-component epoxy to enable easy conversion from antifouling to Hempel's advanced biocide-free fouling protection. Can be applied on previously painted antifouling in good condition.
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Hempel's Silic One Tiecoat 27450
Hempel's Silic One Tiecoat is a high solid, silicone based tiecoat for Hempel's Silic One. Secures adhesion between Hempel's Light Primer or Hempel's Conversion Primer and Hempel's Silic One.
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Hempel's Silic One 77450
Hempel's Silic One is a biocide free, high solid, fouling release coating. Based on silicone, a hydro gel micro layer provides a smooth, low friction surface which prevents organisms attaching to the hull and propellers. Service life of Silic One on the hull is 2 years.
How to
From basic explanations to high end tricks of the PRO's, Hempel bring useful tutorials of the yacht painting process. If in doubt, check this section out, we have just what you need.
