What is Bostik Prep P and why choose it?
Bostik Prep P is a low-viscosity, solvent-based liquid pre-treatment designed to improve the adhesion of Bostik elastic bonding and sealing products on porous substrates. It is especially suitable for mineral substrates such as masonry and concrete, and for wooden substrates including teak, making it a key product in the preparation of teak decks and other marine or construction applications. Its fast drying and dedicated formulation help ensure reliable, durable bonding performance.
Main features
- Optimised for porous substrates: Enhances adhesion of Bostik elastic bonding products on mineral and wooden surfaces.
- Ideal for teak and other wood: Recommended as a pre-treatment for teak (including joints in teak decks) and other wood in contact with adhesives and sealants.
- Fast drying: Approximate drying time of 30 minutes at 20°C and 50% relative humidity.
- Easy application: Low-viscosity liquid that is applied in a thin, continuous film with a clean brush or roller.
- Good coverage: Coverage of approximately 8–10 m² per litre, depending on substrate porosity.
- Professional-grade product: Reserved for industrial and professional use, with clear guidance for safe handling and storage.
Technical characteristics
- Physical form: Low-viscosity liquid
- Colour: Light yellow / transparent
- Specific density: Approximately 1.1 g/ml
- Solid content: Approximately 50%
- Coverage: 8–10 m²/L (depending on substrate)
- Drying time: Approximately 30 minutes at 20°C / 50% RH
- Application temperature: +5°C to +30°C
- Flash point: Approximately -4°C (closed cup)
- Packaging: 500 ml metal can
- Storage stability (unopened): Up to 12 months in a dry place between +5°C and +30°C
- Use after opening: Up to 2 weeks, if the can is kept tightly closed when not in use
Applications and uses
Recommended applications
- Mineral substrates:
- Pre-treatment of masonry, brickwork and concrete surfaces before applying compatible Bostik elastic adhesives or sealants.
- Wooden substrates:
- Pre-treatment of wood surfaces, including teak, that will be bonded or sealed with Bostik products.
- Recommended for joints in teak decks as part of marine bonding and caulking systems.
Surface preparation and application overview
- Substrates must be clean, dry, firm and free from dust and grease.
- Contaminated substrates can be pre-cleaned with appropriate Bostik cleaners (for example Cleaner I, Cleaner 14, Cleaner E or Cleaner 6, depending on the system used). Allow cleaners to dry for 5 minutes before applying Prep P.
- Do not use Prep P directly from the original container. Pour only the quantity needed for up to 30 minutes of work into a clean glass or metal container and immediately close the original can tightly.
- Never return unused material to the original can.
- Apply Prep P in a thin, continuous film using a clean brush or suitable roller, ensuring the surface is completely but thinly coated.
- Do not apply Prep P on top of already dried Prep P.
- For best results, perform bonding or sealing within 6 hours after Prep P application and avoid any contact with the pretreated surface before bonding.
- Do not use Prep P when condensation is forming on the substrate or when relative humidity is very high.
Use on wooden decks and teak decks
- All wooden substrates in contact with adhesive or sealant should be pretreated with Prep P.
- Apply with a suitable roller or brush in a thin but fully closed coat.
- For wooden decks mentioned in the manual, typical drying time after priming is:
- Wooden deck surfaces: minimum 1 hour, maximum 6 hours before applying adhesive.
- Teak seam sides for caulking: minimum 1 hour, maximum 24 hours before applying deck caulk, with bond breaking tape placed after the pretreatment is dry.
FAQ
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What is Bostik Prep P used for?
Prep P is a liquid pre-treatment that improves adhesion of Bostik elastic bonding and sealing products on porous substrates such as mineral surfaces (masonry, concrete) and wooden substrates, including teak.
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Can Prep P be used on teak decks?
Yes. Prep P is recommended for teak and other wooden substrates, including joints in teak decks, both for bonding teak planks and for priming seam sides before deck caulking within Bostik marine systems.
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How should the substrate be prepared before applying Prep P?
The surface must be clean, firm, dry and free from dust and grease. If necessary, clean with the appropriate Bostik cleaner and let it dry for about 5 minutes. Old wooden surfaces should be sanded with 80–100 grain sandpaper and thoroughly vacuumed before priming.
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How is Prep P applied?
Pour the required amount into a clean glass or metal container, keeping the original can tightly closed. Apply a thin, continuous film with a clean brush or roller. Do not apply a new layer over dried Prep P and do not return unused material to the original can.
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What is the drying time before bonding or sealing?
The technical data sheet indicates a drying time of approximately 30 minutes at 20°C and 50% RH. In specific marine deck instructions for wood and teak seams, minimum drying times of 1 hour are stated, with maximum open times up to 6 hours for bonding and up to 24 hours for caulking seams.
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What coverage can be expected?
Coverage is typically between 8 and 10 m² per litre, depending on substrate type and porosity.
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How should Prep P be stored?
Store unopened cans in a dry place at temperatures between +5°C and +30°C. Under these conditions, shelf life is up to 12 months. After opening, the product can be used for a maximum of 2 weeks, provided the can is kept tightly closed when not in use.
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Is Prep P suitable for consumer use?
According to the safety data sheet, the product is reserved for industrial and professional use and is not recommended for consumer use.
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Is Prep P flammable?
Yes. Prep P is classified as a highly flammable liquid and vapour (Flammable liquids Category 2) with a flash point of approximately -4°C. It must be kept away from heat, hot surfaces, sparks, open flames and other ignition sources.
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What should I do if I need data that is not listed here?
Consultar ficha técnica del fabricante.
Section 14 – Transport information
The following information is taken from the safety data sheet for Bostik Simson Prep P and applies to transport under ADR/RID, IMDG and IATA regulations:
- UN number or ID number: UN1993
- UN proper shipping name: Flammable liquid, n.o.s. (Ethyl acetate, n-Butyl acetate)
- Transport hazard class: 3
- Packing group: II
- Label: Class 3 flammable liquid
- ADR description: UN1993, Flammable liquid, n.o.s. (Ethyl acetate, n-Butyl acetate), 3, II, (D/E)
- IMDG description: UN1993, Flammable liquid, n.o.s. (Ethyl acetate, n-Butyl acetate), 3, II, (-4°C c.c.)
- IATA description: UN1993, Flammable liquid, n.o.s. (Ethyl acetate, n-Butyl acetate), 3, II
- Marine pollutant: Not classified as marine pollutant (IMDG: NP)
- Limited quantity (ADR/IMDG/IATA): 1 L
- ADR tunnel restriction code: (D/E)
Always ensure that packaging, labelling and documentation comply with current transport regulations for dangerous goods.
Section 8 – Individual protection measures
The safety data sheet classifies Bostik Simson Prep P as a highly flammable liquid that can cause serious eye irritation, may cause an allergic skin reaction, and may cause drowsiness or dizziness. The following individual protection and exposure control measures are recommended for professional users:
Exposure controls
- Ensure adequate local exhaust ventilation, especially where vapours or aerosols can form. Vapours should be extracted directly at the point of origin.
- Prevent the product from entering drains and soil.
Personal protective equipment (PPE)
- Eye and face protection:
- Wear tight-sealing safety goggles or safety glasses with side shields.
- Eye protection should conform to EN 166.
- Hand protection:
- Wear suitable chemical-resistant gloves, for example multilayer laminate gloves.
- Gloves must meet EN 374 requirements.
- Ensure the breakthrough time specified by the glove manufacturer is not exceeded; typical breakthrough time for the recommended material is generally greater than 60 minutes.
- Skin and body protection:
- Wear suitable protective clothing to avoid skin contact.
- Respiratory protection:
- In case of insufficient ventilation, wear respiratory protection.
- Recommended: respirator conforming to EN 140 with Type A/P2 filter or better.
- Use an organic vapour and particles filter conforming to EN 14387.
General hygiene and safety measures
- Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
- Avoid breathing vapours, mist or spray and avoid contact with skin, eyes and clothing.
- Do not eat, drink or smoke when using this product.
- Wash hands before breaks and after handling the product.
- Remove contaminated clothing and wash before reuse.
- Only trained industrial or professional users should handle this product.
*Contenido generado por IA
