Overview
BYK-A 535 is a silicone-free air release additive for solvent-borne and solvent-free epoxy and polyurethane systems. As one of the recommended international brand products in our auxiliary agent range, this additive is supplied with supply chain resource support for formulators sourcing a silicone-free defoamer for ambient-curing plastic systems, adhesives, sealants, and coatings.
Key Features of BYK-A 535
- Silicone-free air release additive
- Prevents foam and bubbles during manufacture and application
- Prevents air bubbles and pinholes
- Suitable for materials that come into contact with food, including drinking water
Applications
In ambient-curing plastic systems, this additive helps prevent foam and bubbles during manufacture and application, and is particularly recommended for polyurethane-based floorings and casting systems, such as polymer concrete and mineral casting, that are based on epoxy resins. In adhesives and sealants, it functions as a defoamer for all solvent-borne and solvent-free formulations, particularly recommended for systems based on polyurethane and epoxy resins. In the coatings industry, it is particularly suitable for solvent-free systems such as polyurethane and epoxy coatings.
Why Silicone-Free Air Release Matters
Silicone-containing defoamers can leave surface contamination that interferes with recoating, adhesion, or subsequent finishing steps, which is why many formulators specifically look for a silicone-free option when working with epoxy and polyurethane systems that will be recoated, bonded, or used in food contact applications. Because BYK-A 535 is silicone-free and suitable for materials that come into contact with food, including drinking water, it is positioned for formulations where silicone contamination or food safety compliance would otherwise rule out a conventional defoamer.
Preventing air bubbles and pinholes is particularly important in cast and flooring applications, where trapped air can create visible surface defects or weak points in the cured part. Formulators should always confirm current dosage recommendations and compatibility against the latest technical data sheet for their specific formulation.
What to Consider When Sourcing BYK-A 535
When sourcing an air release additive for epoxy or polyurethane systems, formulators typically evaluate defoaming efficiency, compatibility with the resin system already in use, and food contact suitability where relevant. Working with a supplier that can provide consistent documentation and responsive technical support can help reduce qualification time when approving a new additive for a flooring, adhesive, sealant, or coating line.
Because BYK-A 535 may cause cloudiness in transparent systems, formulators working with clear or transparent epoxy or polyurethane formulations should test for this effect before finalizing a formulation, rather than assuming it will perform identically to a defoamer used in opaque or pigmented systems.
General Handling and Storage Guidance
As with most air release additives, this product should be kept in tightly sealed original containers, stored in a cool, dry location away from direct sunlight and heat sources, and used within the manufacturer’s recommended shelf life. Because dosage and dispersion can affect defoaming performance, formulators should confirm current mixing recommendations before use.
Shelf life and specific storage recommendations vary by batch and packaging format, so formulators should always confirm current shelf life, recommended storage conditions, and any handling precautions against the latest technical data sheet and SDS for the specific batch of BYK-A 535 they are working with.
How This Additive Performs Across Applications
Ambient-curing plastic systems such as polymer concrete and mineral casting typically prioritize air release during casting to avoid trapped bubbles in thick sections, while adhesives and sealants place more emphasis on defoaming during mixing and application without disrupting bond strength. The coatings industry adds further requirements around film-level air release, since surface pinholes are more visually apparent in a thin, cured coating film than in a cast part.
Because this additive is positioned across all three application areas, formulators evaluating it for a new system should confirm which performance priority, bulk air release in casting, defoaming during mixing, or film-level pinhole prevention, matters most for their specific end use, and review current technical data before finalizing a formulation.
Where to Source This Product
Thousands Chemicals connects formulators with BYK-A 535 and related auxiliary agent products through our digital B2B marketplace. Air release and defoaming performance for epoxy and polyurethane systems are commonly evaluated using test methods published by organizations such as ASTM International. Our team can help confirm packaging, lead times, and technical documentation for your target application and order volume.
Documentation We Can Provide
For buyers evaluating this additive for a new flooring, casting, adhesive, sealant, or coating formulation, our team can help arrange the current technical data sheet and safety data sheet. Having this documentation in hand before finalizing a formulation can help avoid delays later in your qualification or approval process.
FAQ
What is BYK-A 535 used for?
It is a silicone-free air release additive used in ambient-curing plastic systems, adhesives and sealants, and solvent-free polyurethane and epoxy coatings.
Is this additive suitable for food contact applications?
Yes, it is suitable for materials that come into contact with food, including drinking water.
Does BYK-A 535 affect transparent systems?
It may cause cloudiness in transparent systems, so formulators working with clear formulations should test compatibility before finalizing a formulation.
Can you provide technical documentation and bulk pricing?
Yes, technical data sheets and SDS documentation are available on request, and our team can provide bulk pricing and lead times based on your target volume and delivery location.
Get a Quote for BYK-A 535
Contact our team for a quote, technical data sheet, or SDS for this additive. We support bulk supply and global shipping for formulators sourcing silicone-free air release additives for epoxy and polyurethane systems.
