
DRYLOK® is a waterproofing paint that can be used to prevent water from penetrating foundation walls and destroying your home's foundation. It is designed to be used on bare masonry and concrete surfaces and can be applied to walls with a brush, roller, or paint sprayer. DRYLOK® Fast Plug® is a quick-setting hydraulic cement used to fill joints, holes, and cracks in walls before applying DRYLOK® Masonry Waterproofer. While DRYLOK® can be used over any cementitious-type waterproofing paint in good condition, it is not recommended for use over oil or latex-based paints as it will not effectively waterproof the surface. This raises the question of whether DRYLOK® Fast Plug® can be used over DRYLOK® Masonry Waterproofer for effective waterproofing.
| Characteristics | Values |
|---|---|
| Can you put fast plug over drylock waterproof paint? | Yes, you can put fast plug over drylock waterproof paint. However, it is advised to use waterproofing paint or apply a water sealant before applying paint. |
| Drylok Fast Plug | A water-resistant product that creates a watertight seal to prevent active or recurring leaks from flowing through holes and cracks in a variety of masonry surfaces. |
| Drylok Waterproofers | Protect surfaces from moisture penetration. |
| Using Drylok over paint | DRYLOK® may be used over any other cementitious-type waterproofing paint in good, repaintable condition, either inside or outside. However, DRYLOK® cannot be used over an oil or latex-based paint on the inside of a building. |
| Drylok Concrete Protector | A penetrating sealer for bare concrete. After application, wait 24 to 48 hours before painting with a latex or acrylic floor paint. |
| Drylok Wetlook Sealer | A decorative high-gloss coat over floor paint. |
| Drylok Latex Masonry Waterproofer | Acts as a primer for any good-quality latex paint. |
| Drylok Fast Plug Usage | Wear eye protection, rubber gloves, and a dust mask. The area to be patched should be cleaned thoroughly by wire-brushing, scraping, or any other effective process. Mix 3 parts DRYLOK® Fast Plug® and 1 part water at room temperature thoroughly until you achieve a putty or heavy troweling consistency. |
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What You'll Learn
- Drylok Fast Plug can be painted over with a variety of paints and sealers
- Drylok cannot be used over oil or latex-based paint
- Drylok may be used over cementitious-type waterproofing paint
- Drylok will not work over paint if it can't penetrate the pores of the masonry
- Drylok Original Masonry Waterproofer can be used to paint over Drylok Fast Plug

Drylok Fast Plug can be painted over with a variety of paints and sealers
DRYLOK® Fast Plug is a water-resistant product that creates a watertight seal to prevent active or recurring leaks from flowing through holes and cracks in a variety of masonry surfaces. It is a hydraulic cement for masonry structures and can be used for anchoring handrails, filling cracks and holes, and filling utility openings. DRYLOK® Fast Plug can be used over any other cementitious-type waterproofing paint in good, repaintable condition, either inside or outside. However, it cannot be used over an oil or latex-based paint on the inside of a building.
Before using DRYLOK® Fast Plug, it is important to wear eye protection, rubber gloves, and a dust mask. The area to be patched should be cleaned thoroughly by wire-brushing, scraping, or any other effective process. The area to be patched should be chiselled out to the shape of an inverted "V", with the point at the surface. Both DRYLOK® Fast Plug and the water for mixing should be at room temperature. The mixture, which consists of 3 parts DRYLOK® Fast Plug and 1 part water, should be mixed thoroughly until a putty or heavy trowelling consistency is achieved. This mixture will set in 3 to 5 minutes, and the patched area may be smoothed and trimmed to the surrounding area in approximately 5 minutes.
DRYLOK® Fast Plug can be painted when set with DRYLOK® Original Masonry Waterproofer, DRYLOK® Extreme Masonry Waterproofer, DRYLOK® Powdered Masonry Waterproofer, or DRYLOK® Concrete Floor Paint. Unlike DRYLOK® waterproofers, you can easily apply a variety of paints and sealers over DRYLOK® Fast Plug. For example, you can use DRYLOK® Wetlook Sealer for a decorative high-gloss coat over floor paint.
If you have patched a wall that was previously painted with a DRYLOK® waterproofer, follow the recommendations set out in "Can You Apply DRYLOK® Over Old DRYLOK®" for the best results. Additionally, if you plan to use DRYLOK® Latex Masonry Waterproofer, note that it will act as the primer for any good-quality latex paint, so you do not need to prime before putting on a decorative paint.
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Drylok cannot be used over oil or latex-based paint
While DRYLOK® can be applied over any other cementitious-type waterproofing paint in good, repaintable condition, it cannot be used over oil or latex-based paint on the inside of a building. This is because DRYLOK® works by entering the pores of the masonry and expanding as it dries to become part of the wall surface. However, if the paint is oil or latex-based, it will not be able to penetrate into the pores of the masonry, and therefore will not be able to waterproof the surface.
DRYLOK® will still adhere to these paints, and can be applied smoothly with a stiff-bristle brush or paint roller. However, the chemical will not be able to prevent moisture from seeping in through the concrete wall or flooring.
To prepare the painted walls or flooring for DRYLOK®, the surface must be completely clean and free of any dust, dirt, and debris. Use a piece of 200- or 220-grit sandpaper to smooth out any rough areas on the painted wall, including peeling and cracking paint. After sanding, wipe the walls or flooring with a wet cloth to remove any remaining debris.
In summary, while it is possible to apply DRYLOK® over oil or latex-based paint, it is not recommended as it will not effectively waterproof the surface.
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Drylok may be used over cementitious-type waterproofing paint
DRYLOK® is a versatile masonry waterproofer that can be applied to interior and exterior concrete or masonry walls. It is designed to stop water ingress and resist mildew on the dry paint film.
When it comes to using DRYLOK® over other paint, the answer is a qualified yes. DRYLOK® may be used over any other cementitious-type waterproofing paint in good, repaintable condition, either inside or outside. This is because DRYLOK® works by entering the pores of the masonry and expanding as it dries, becoming part of the wall surface.
However, it is important to note that DRYLOK® cannot be used over oil or latex-based paint on the inside of a building. While DRYLOK® will adhere to these paints, it will not be able to penetrate into the pores of the masonry, and therefore will not effectively waterproof the surface.
Before applying DRYLOK®, it is important to ensure that the surface is clean, dry, and free of grease, oil, form release compound, and old paint. Old paint should be removed by wire-brushing, sandblasting, or other suitable methods. If the surface is only slightly damp, DRYLOK® can still be applied, but the best results are obtained on a completely dry surface.
In summary, DRYLOK® is a reliable and effective waterproofing solution, especially when used over cementitious-type waterproofing paint in good condition.
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Drylok will not work over paint if it can't penetrate the pores of the masonry
DRYLOK® is a waterproofing paint that can be used on both exterior and interior masonry surfaces. It is designed to enter the pores of the masonry and expand as it dries, becoming part of the wall surface. This process creates an effective waterproof barrier.
However, DRYLOK® cannot be applied over oil or latex-based paints on interior walls. While DRYLOK® will adhere to these paints, it will not be able to penetrate the pores of the masonry and, therefore, will not provide adequate waterproofing. To ensure the effectiveness of DRYLOK®, it is recommended to remove any existing coatings before application.
DRYLOK® is specifically formulated for cementitious-type waterproofing paint and can be used over such paint in good, repaintable condition, both indoors and outdoors. It is important to note that DRYLOK® Masonry Waterproofer is intended for use on bare masonry and concrete surfaces, including porous terracotta, concrete, stucco, and cement.
In summary, DRYLOK® will not work as intended if it cannot penetrate the pores of the masonry due to the presence of certain types of paint or coatings. Proper surface preparation, including the removal of existing paint or coatings, is crucial to ensure the effectiveness of DRYLOK® as a waterproofing solution.
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Drylok Original Masonry Waterproofer can be used to paint over Drylok Fast Plug
DRYLOK® Original Masonry Waterproofer can be used to paint over DRYLOK® Fast Plug®. DRYLOK® Fast Plug® is a fast-setting hydraulic cement used to patch holes and cracks in masonry. It is recommended to wet the surface to be patched so that the Fast Plug® can better anchor itself into the wall. After applying the Fast Plug®, the patch should be smoothed so that it is even with the surface around it. As it sets rapidly, it is important to only mix the amount that can be used within 3 to 5 minutes.
DRYLOK® Original Masonry Waterproofer is a waterproofing product designed to be applied to bare masonry surfaces. It is important to note that the surface should be clean, dry, and free of grease, oil, form release compound, and paint for optimal results. While the product can be applied to a slightly damp surface, it is recommended to remove any old paint in poor condition before applying the waterproofer.
When applying DRYLOK® Original Masonry Waterproofer, it is important to stir the product thoroughly before and during application and not to thin it. The first coat can be applied using a three-quarter-inch nap roller, a DRYLOK® Brush, or a quality nylon bristle brush. If using a brush, it is important to work the product into the pores of the masonry, ensuring that all pores and pinholes are filled. If using a roller, the first coat should be back-brushed to fill in any pores or pinholes. After the first coat has dried (typically within three hours), a second coat should be applied using a roller or brush.
It is important to apply a minimum of two coats of DRYLOK® Original Masonry Waterproofer to ensure proper waterproofing. After the second coat, the surface should be carefully inspected for any pinholes, and additional coats should be applied as needed. If leaking persists after two coats, it indicates that there are still open pores or pinholes. In such cases, it is recommended to paint these areas again.
In summary, DRYLOK® Original Masonry Waterproofer can be effectively used to paint over DRYLOK® Fast Plug®, a fast-setting hydraulic cement used for patching holes and cracks in masonry surfaces. By following the recommended application techniques and allowing adequate drying time, a durable and waterproof finish can be achieved.
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Frequently asked questions
No, you cannot put Drylok Fast Plug over Drylok waterproof paint. Fast Plug is used to fill in holes and cracks before applying the paint.
Drylok Fast Plug is a quick-setting hydraulic cement used to fill in holes, cracks, and joints before applying Drylok waterproof paint.
To apply Drylok Fast Plug, first, clean the area and wet it down. Then, fill in the gaps and holes with the Fast Plug. It will set in approximately 3 minutes.
No, Drylok Fast Plug is specifically designed for use on cement or bare masonry surfaces. It can be applied to porous terracotta, concrete, stucco, and cement.
Drylok Fast Plug is used to fill in holes and cracks before painting, while Drylok Masonry Waterproofer is the actual paint that waterproofs the surface.











































