Altro resin seals and coatings are used to treat concrete floors and finished walls to provide a tough chemical and abrasion resistant 90-240 micron wall or floor finish. AltroShield Seal Coloured – twin pack epoxy, solvent based. AltroShield Seal Clear – twin pack epoxy, solvent free. Slip resistant coatings – these include a range of light textured surfaces, offering moderate slip resistance - AltroShield Seal Plus.