Concrete has a high porosity which can be a problem when deciding how exactly to seal the floor. This high porosity means that paint doesn’t adhere correctly to the floor and seeps into the concrete giving you a blotchy, streaky concrete floor.

You can apply a second coat of PVA sealer if you think it’s necessary. However, a single coat is often sufficient. Have a look at the final job and if there are patches missing or it seems like it didn’t take properly then apply a second sealer coat of PVA and wait for it to dry. 8. It’s time for the clean-up To use in sand and cement, a mixture of 2 parts PVA to 1 part water is general. Tip the PVA in the water and mix as normal. PVA dries to a colourless finish and will not react with any other surface preparation or finish. We have sealed concrete floors with PVA before with no issues but it’s a debated topic among DIYs and tradesmen.Polyvinyl acetate, (PVA) is a multi-purpose chemical compound that has a large application base and is the ingredient in many compounds that are used around the home DIY industry. You can find PVA in the likes of latex acrylic paint and drywall primer in addition to concrete floor sealers.

PVA can be added to a cement mortar mix to give the mix a) slightly better waterproofing qualities and b) advanced adhesion to the surface it is applied to. Painting a coat of PVA on the surface before the cement mortar is applied can even further increase this adhesion. PVA and Uses With Timber The first step is to inspect the floor and remove any dried concrete that appears on the surface. If you have paint splatters dried in then you are going to want to remove those as well as these will cause issues with the PVA. You can scrape it off for a smooth surface, If you are finding it hard to remove paint marks or blotches then you will need to use a paint stripper before moving onto the next step. 2. Clear the concrete floor PVA also acts as a bonding agent, so applying a coat of PVA before plastering helps bond plaster to walls. Where can you use PVA to seal concrete? You can use it as a sealer on any concrete floor, this could be a garage concrete floor or in the household.Paint it onto the wall the same way you’d paint while decorating, and use a paint roller instead of a brush if you need to cover a large area. Storage & Home Clearance Furniture Clearance Garden & Outdoor Clearance Lighting Clearance Electrical Clearance Tools Clearance Paint & Decorating Clearance Flooring & Tiling Clearance Building & Hardware Clearance Bathrooms & Plumbing Clearance Kitchens Clearance Ensure the area is clean and clear before you start applying the PVA sealer. 6. Wait for the sealer to dry Once the sealer has been applied wait for the concrete to dry out. It won’t take long but it’s best to leave it overnight so leave at least 12hours but it’s best to leave about 24 hours to ensure that all the sealer has completely dried into the concrete. 7. Do you need a second coat