High-performance peel and seal adhesive formulated for demanding envelope applications. This latex-based adhesive provides exceptional tack for difficult substrates and larger envelope formats where strong, reliable closure is non-negotiable.
High-performance peel and seal adhesive formulated for demanding envelope applications. This latex-based adhesive provides exceptional tack for difficult substrates and larger envelope formats where strong, reliable closure is non-negotiable.
The cream-coloured adhesive delivers consistent performance across varied envelope substrates and production conditions.
Where standard self-seal adhesives struggle with coated papers, heavy card stocks, or recycled materials with irregular surfaces, Aquadex 4628’s high tack formulation maintains reliable grip. This makes it particularly valuable for premium envelope products, catalogue envelopes, and speciality applications where substrate variety is high.
Bigger envelopes place greater stress on closures due to increased weight and larger surface areas that can catch during handling. The high tack properties mean larger envelopes stay sealed through postal sorting equipment and delivery processes, reducing customer complaints and returns.
The combination of high-speed capability with low maintenance requirements means production lines run smoothly without frequent stops for equipment cleaning or adjustment. This consistency translates directly into higher output rates and more predictable production scheduling.
AQUADEX 4628 is a peel and seal latex adhesive. The peel and seal format features a release strip that protects the adhesive until the envelope is ready for use. When the strip is removed, the exposed adhesive creates a pressure-sensitive bond when the flap is pressed down. This format combines the convenience of self-seal with the protection of remoistenable, preventing accidental closure during storage or handling. The formulation has been developed specifically to provide higher initial tack than standard self-seal products, addressing the challenges of bonding to difficult substrates where surface energy or texture can interfere with adhesion. The adhesive maintains its sealing properties over extended storage periods, providing reliable performance even for envelopes that spend months in stock before use.
Envelopes
Dextrin/Starch Adhesive
Cream
Roller, Spray
18.0 Poise
58.0%
N/A
N/A
Liquid
Card, Difficult-to-bond Materials, Recycled Paper Stock, Paper, Envelope Stock, Coated Stock
Use appropriate personal protective equipment when handling, including chemical-resistant gloves and safety eyewear. Work in areas with adequate ventilation to minimise exposure to vapours. Avoid prolonged skin contact and wash thoroughly if contact occurs. Keep containers closed when not in use and store away from heat sources. For complete safety guidance, including first aid measures and fire-fighting procedures, refer to the product Safety Data Sheet. Follow all local regulations for storage, handling, and disposal.
AQUADEX 4628 should be applied at ambient temperature through standard peel and seal equipment. The release strip must be applied immediately after adhesive application and whilst still wet to prevent premature skinning. Stir thoroughly before use to maintain homogeneity. Clean application equipment with warm water before adhesive dries to prevent difficult build-up removal.
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