Bituminous solvent primer
Bituminous solvent primer is a type of coating used to prepare surfaces for bitumen-based waterproofing materials. It is a solvent-based mixture made up of bitumen, solvents, and other additives. The bitumen used in the primer is usually derived from petroleum, and the solvent is typically a low-aromatic hydrocarbon or a blend of different solvents.
The purpose of the primer is to provide a clean, stable, and adhesive surface for the subsequent bitumen-based waterproofing materials to adhere to. The primer penetrates into the surface to be coated and forms a thin, uniform layer that helps to seal and protect the surface from moisture and other contaminants.
Bituminous solvent primer is commonly used on concrete, masonry, and other porous surfaces. It can also be used as a bonding agent between different layers of bitumen-based waterproofing materials. The primer is typically applied with a brush or a roller, and it dries quickly to form a tacky surface that is ready for the subsequent coating.
Bituminous solvent primer is primarily used to prepare surfaces for bitumen-based waterproofing materials, such as roofing membranes, asphaltic coatings, and sealants. The primer helps to create a clean, stable, and adhesive surface that allows the subsequent coatings to adhere more effectively. Here are some specific uses of bituminous solvent primer:
- Roofing: Bituminous solvent primer is commonly used to prime concrete and metal roofs before applying bitumen-based roofing materials such as APP waterproofing membrane or SBS waterproofing membrane. The primer helps to improve adhesion and creates a more durable and long-lasting roofing system.
- Tank linings: Bituminous solvent primer is used to prepare the surface of steel and concrete tanks before applying bitumen-based linings. The primer helps to seal the surface and create a more effective bond between the lining and the substrate.
- Bridge decks: Bituminous solvent primer is used to prime concrete bridge decks before applying a bitumen-based APP waterproofing membrane system. The primer helps to improve adhesion and create a more durable and long-lasting system that can withstand harsh weather conditions.
- Foundations/Basements: Bituminous solvent primer is used to prime concrete and masonry foundations before applying bitumen-based waterproofing materials. The primer helps to seal the surface and prevent water from penetrating the foundation, which can cause damage and lead to structural issues.
- Podium Slabs: Bituminous Solvent Primer is used to prepare Concrete surface of podium slab to receive Bituminous Polyurethane (PU) liquid applied membrane. The primer helps to improve adhesion between the concrete and the Bituminous PU membrane.
General application instructions for bituminous solvent primer:
- Surface preparation: The surface to be coated should be clean, dry, and free from any contaminants, such as dust, oil, grease, or loose debris. If necessary, the surface should be cleaned using a suitable detergent or solvent, and any cracks or defects should be repaired before applying the primer.
- Mixing: Bituminous solvent primer should be stirred thoroughly before use to ensure that the ingredients are well-mixed. If the primer has settled or separated during storage, it should be re-stirred until it is uniform.
- Application: Bituminous solvent primer can be applied using a brush or roller. The primer should be applied in a thin, even layer, taking care to avoid pooling or excessive buildup.
- Drying time: Bituminous solvent primer typically dries quickly, usually within a few hours. However, drying times can vary depending on factors such as temperature, humidity, and substrate porosity. It is important to follow the manufacturer’s instructions regarding drying times and recoat intervals to ensure that the primer is fully cured before applying the subsequent coatings.
- Clean-up: Any tools or equipment used for applying bituminous solvent primer should be cleaned with a suitable solvent immediately after use. The solvent should be disposed of properly, according to local regulations.
It is important to note that specific application instructions may vary depending on the particular product and the conditions of the application site. It is always recommended to follow the manufacturer’s instructions carefully to ensure proper application and optimal performance.
The recommended coverage rate is typically around 0.2 to 0.4 liters per square meter, but this may vary depending on the specific product and application.