Adhesive deformulation laboratory: how should I compare adhesive and sealant analysis scopes?
Short answer
We would compare proposed adhesive and sealant deformulation scopes by the chemical question they answer, the specimen state they describe and the identity level their evidence can support. Ask each laboratory to review the actual water-based product, hot-melt solid, separate reactive components or cured layer before shipment, because receiving decisions depend on the specific proposed material. Request findings that separate supported compounds, broader polymer or curing families and estimated proportions, with unresolved fractions stated rather than converted into an exact original adhesive recipe.
What should you ask every lab before sending an adhesive or sealant sample?
Give each laboratory the same specimen description and decision question, such as investigating tackifier chemistry in a pressure-sensitive layer or comparing retained ingredients in two newly cured sealant beads. The following questions help keep the proposed work tied to that decision instead of treating every adhesive analysis heading as a promise to recover all starting ingredients.
Will the result describe uncured adhesive or the cured bond line?
Ask which chemical state the study will describe and whether volatile or reactive ingredients can disappear when the specimen is cured, since a cured bead can support retained-chemistry questions without preserving the original cartridge contents. Also state whether your decision concerns incoming material, application behavior or the finished joint, because those questions need different evidence.
Can separate A and B components be proposed without losing their identities?
For a two-part system, ask whether each original component can be reviewed separately and how the cured companion would be related to them, rather than assuming the receiving decision for one component covers both. A free hardener and its reacted contribution answer different identity questions, so request that distinction in the proposed report.
Which solvent-based, aqueous or hot-melt forms can the laboratory review?
Describe the actual liquid medium, solid or semi-solid state and reactive ingredients, then ask about that specimen rather than relying on the broad label adhesive or sealant. If a film or solids fraction is proposed instead of the supplied liquid, ask which original-liquid questions will remain unanswered after preparation.
Can the adhesive layer be distinguished from the bonded substrate?
Ask whether the laboratory needs the intact joint, a separated adhesive layer or an accompanying unbonded substrate, especially when a thin adhesive contribution sits between much larger backing materials. Separation can carry over substrate fragments or lose interface material, so identify any preparation already performed and ask how that uncertainty will be reported.
Can a pressure-sensitive adhesive distinguish tackifier from elastomer?
Ask whether the proposed output distinguishes tackifier evidence from the elastomer or polymer backbone, because an accessible resin fraction does not necessarily describe the whole pressure-sensitive adhesive. Wax, oil or other mobile ingredients may accompany the same extract, and overlapping resin features can leave some contributions at family level.
What is the basis of each estimated ingredient proportion?
Ask whether estimates refer to supplied wet adhesive, a cured film, a whole bonded assembly or an extracted fraction, because changing that basis changes the apparent ingredient balance. Request separate labels for supported molecular estimates, measured elements and unresolved material so the table does not suggest an exact mixing sheet.
Would a matched reference, unused rejected batch or substrate blank help?
Ask which companion specimen could distinguish a formulation change from substrate contribution, storage history or cure differences, and identify the purpose of each proposed reference. Compare corresponding layers in comparable states; different cure histories can alter retained chemistry before any change in the incoming formulation is considered.
Which bond or seal performance questions remain unanswered?
Ask which tack, peel, shear, movement or weathering questions fall outside the composition study, rather than treating matching binder or additive families as proof of equal joint behavior. A chemical difference can guide a development trial, but substrate preparation, cure and joint design remain separate explanations for application behavior.
What do several labs publicly say they offer for adhesive and sealant deformulation?
EAG Laboratories includes pressure-sensitive, hot-melt and waterborne adhesives among its listed deformulation objects on its deformulation page. The same list names epoxy, polyurethane and silicone sealants.
Alfa Chemistry lists thermosetting, thermoplastic and elastomeric adhesives on its adhesive deformulation page. Its curing-method list also includes two-part adhesives and hot-melt adhesives.
Jordi Labs includes adhesives among the products named on its product deformulation page. The page describes its service scope as complete material deformulations.
We review water-based adhesives, hot-melt solids and cured adhesive films after declaration and SDS review; non-water-based liquids are not received as supplied, so declare the original and propose a suitable cured specimen for review. Our English PDF would connect supported identities and estimates to a conclusion card, component table and data appendix, explaining the unresolved portion of the accepted adhesive or sealant.
Our reports are research-grade analytical reports from a laboratory that is not accredited. They cannot be used for product registration or legal proceedings.
Which questions can only a test sample answer?
Only the actual specimen can show whether the target tackifier or additive is accessible, whether substrate material masks it and whether the molecular evidence distinguishes one ingredient from a broader family. For example, a manufacturer who wants to replace a sealant can use supported retained-chemistry differences to frame a formulation trial, while keeping cure behavior and the intended joint movement as separate application checks.
What adhesive or sealant forms should I declare to us before shipment?
Identify every proposed component, cured layer and substrate, with SDS and preparation details; isocyanate-containing two-part adhesives and reactive polyurethane hot melts require case-by-case review. Use our industrial inquiry page and shipping guide; ship after agreement, payment and an acceptance number.
Which related guides should I read?
FAQ
Can a cured sealant reveal the original liquid blend?
A cured sealant describes retained and reacted material; lost solvents and consumed reactive ingredients prevent that specimen alone from supplying the complete original liquid blend.
Does a public adhesive service description authorize shipment?
A public adhesive service description does not determine receipt of your specific component or prepared layer, so obtain the laboratory’s decision for that actual specimen before shipping.
Does a matching tackifier family prove equivalent tack?
A matching tackifier family is composition evidence; polymer balance, mobile ingredients, backing and application conditions can still change pressure-sensitive adhesive behavior.
Send a sample declaration and tell us which question the sample should answer.