Anti-Osmosis Treatment

THE PROBLEM OF OSMOSIS. The problem of osmosis appears with the presence of bubbles caused by moisture infiltration under the gelcoat layer. Depending on its entity it may be necessary in some cases to remove the gelcoat layer completely; alternatively if the problem is confined to some areas of the surface only, it is possible to carry out a waterproofing treatment with the application of 2-3 coats of EPOSEALER Impregnazione & Antiosmosi.
This is a two pack dense solvent-free epoxy product performing an insulating waterproofing barrier able to effectively withstand the formation of osmosis

CURING AND PREVENTION SYSTEMS

Fibreglass affected by osmosisi / Curing system. Surface preparation. Remove all bubbles and swollen parts from the surface by light sanding or mechanical disking extending this to near surrounding areas. Take care to remove old paint residuals and rinse the surface with fresh water. Let dry for 30-60 days.

Waterproofing with EPOSEALER Impregnazione & antiosmosi. After a suitable lapse of time when the surface is dry and free from condensation, apply a first coat of EPOSEALER Impregnazione & Antiosmosi without dilution, using a stiff haired type of brush, taking care to particularly coat the areas where the problem appears to be. Apply 120-200 wet microns. Let dry for 24 hours and wet sand. Then apply a second coat and if necessary also a third one, allowing the required waiting period between coats.

New fibreglass / Osmosis prevention system. The application of EPOFOND H.B., two component epoxy antiosmosis primer, onto the fibreglass surface of a new boat enables to effectively prevent the problem of osmosis. In order to grant the best possible protection it is recommended that the gelcoat substrate be well degreased and sanded with medium grain abrasive paper. When the substrate preparation has been completed, apply 2-3 coats of EPOFOND H.B., anti-osmosi coating to build up a total thickness of approx. 150-200 dry microns. (For new boats it is however suggested that one month waiting period be waited before starting painting application of the prevention system).
EPOFOND H.B., anti-osmosis coating can also be applied as a primer or intercoat system in bottom coating system without sandpapering. If overcoated with two-component coatings within 30 days the product performs suitable adhesion over all types of surfaces. In case of overcoating with one-component products, including antifouling paints, the recommended recoat time to be allowed between coats is 6-8 hours for temperatures above 20°C or 12-24 hours when temperatures are between 10 and 20°C.